Re: [opensuse-factory] Firewall not consistent..

2007-09-18 Thread M9.
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Carlos E. R. schreef:
 
 The Monday 2007-09-17 at 17:12 +0200, M9. wrote:
 

 
 You know that there are handheld gadgets that you carry in your pocket 
 when you have a walk and beep or buzz when they detect a wifi. I have been 
 told of people doing it in their cars, putting a special aerial with a 
 magnet on the car roof. They can use a portable computer running a certain 
 windows program that detects the networks it finds, and writes all that in 
 a report. Plus, if connected to a GPS and a map software, it plots the 
 findings in the map, with colors showing how kind are the neighbors.
 
 The person that told me this said that they were thinking on doing this 
 for their final project on university, and had a round of the industrial 
 park here with that setup. The findings were very /interesting/, but 
 refrained from making them public.
 
 But I had seen a similar report  published in an article by the IEEE, it 
 wasn't news to me.
 
 
 Not your case, but people should be way more cautious with their wifis. On 
 another message I wrote a sample of what damage can get done to such 
 trusting users.
 

I know this is true, because a friend of mine for years allways only
uses some neighbours wifi-networks, he says that they pay for it anyway,
if he uses them or not, but he only uses the internet connection, and
does not intrude their networks or pc's.

I have tried to crack mine, but only thing that happened was that the
whole network went down every time... ;-)

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Re: [opensuse-factory] Firewall not consistent..

2007-09-18 Thread M9.
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Carlos E. R. schreef:
 
 The Monday 2007-09-17 at 17:03 +0200, jdd wrote:
 
 Carlos E. R. wrote:
 
 A cracker can make his PC look like one of yours and connect, instantly.
 that is a cracker can guess your wep key (don't ask me how :-(), at the 
 moment
 lurking the net gives him the mac adresse of the various hosts.
 
 Yes, but he didn't say if he is using wep. My point is, that basing 
 security only in giving IPs to known machines, using the hardware address, 
 is not secure. Added to other methods, yes.
 
 And wep... I was told of an ISP technician that installed all routers in 
 his area withe keys of the 012345678901234567890xx type, the last to 
 digits being related to the customer. The customers were happy because 
 they had a long key that was easy to remember. The crackers were even 
 happier.
 
 
 the problem is: why should a cracker do this on your network? If this was one
 of a big company or if your work is highly important, may be.
 
 may be also an evil neigbor
 
 Or one without ISP, and just wanting to send his emails free. I have a 
 friend in that case.
 
 Somebody told me that once he tested his neighbors wifi network, and got 
 in easily. He then captured the traffic, and managed to learn his bank 
 login and password - shame on the bank for sending that in clear -. He 
 even tested it by entering the bank account, and exited. Obviously, that 
 neighbor was using windows. He said that, had he being malign, he would 
 have connected to the bank from a second neighbor network, and sent the 
 money to a third one: there would be no way to track him, and the police 
 would blame the second neighbor.
 
 
 Anyway, M9 doesn't have neighbors, so he probably doesn't those problems :-)
 

Looking into my bank-account, he/she would probably get tears in his/her
eyes, and in pity, he/she would send some money to my account ;-))





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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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jdd schreef:
 M9. wrote:
 

 default openSUSE install are usually quite defensives and allow little
 open ports and little running servers (I'm not even sure that sshd is
 running by default)

No it is not..

 


 
 so what is the server you fear to be broken?

I wish i knew..

 
 Offcourse there has to be a change to change something.
 In this case i did not change a thing.
 Why should i?
 It worked, and i never change something that does its job well..


 
 however no firewall and certainly not on Linux can change by itself :-),

That is what i thought..

 so something must have been done, evidently accidentally :-).

Indeed, but not by me, and there is no-one else that uses this pc...

 
 what you could do is:
 
 * backup the /etc/sysconfig folder (it's small , do a complete backup of
 it)
 * do SuSEfirewall2 stop to stop the firewall
 * remove the /etc/sysconfig/SuSEfirewall2
 * in yast, force the reinstall of the firewall, like this you should
 recover the default config file
 
 hope this works
 jdd
 

Yep, sounds sane, i can try that ;-)
I will let you know..

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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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Rajko M. schreef:
 On Saturday 15 September 2007 12:38:53 pm jdd wrote:
 M9. wrote:

 Don't forget that there is few computers in M9 network wireless. and problem
 can come from that side too. They are part of internal network, they probably
 have enabled ad hoc wireless and if some neighbor has no wireless access
 point it can without knowing what he is doing connect to any windows
 computers in range. If he has viruses they will find the way in. Taking how
 easy most of windows users dismiss firewall popups it opens unlimited
 possibilities.


In this case i let my router take security, by selecting which wireless
pc's or laptops can enter the network.
Until now this allways worked.
If i add a new wireless one, i have to give it permission in my router.
It will see the network, but will not be able to acces it.
An advantage my router ( i do not know if any router has that ), has, to
protect the network.

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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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Carlos E. R. schreef:

 The Saturday 2007-09-15 at 19:38 +0200, jdd wrote:

 default openSUSE install are usually quite defensives and allow little open
 ports and little running servers (I'm not even sure that sshd is running by
 default)

 The sshd daemon is intalled and runs, but the port is left closed in the
 firewall, if I remember correctly. Every port is left closed.

 what you could do is:

 * backup the /etc/sysconfig folder (it's small , do a complete backup of it)
 * do SuSEfirewall2 stop to stop the firewall
 * remove the /etc/sysconfig/SuSEfirewall2
 * in yast, force the reinstall of the firewall, like this you should recover
 the default config file

 I think he can simply copy over the default from the
 '/var/adm/fillup-templates/sysconfig.SuSEfirewall2' file.


Even more simple ;-)


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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread jdd

M9. wrote:


so something must have been done, evidently accidentally :-).


Indeed, but not by me, and there is no-one else that uses this pc...


what one can do accidentally is unlimited :-(. This can (just a guess) 
be the result of a powerdown at the worst moment


I have an hosted server (physically hosted by an university) that 
couldn't boot after an unwanted power down.  typing lilo at the 
rescue prompt was enough to restore the boot sector.


after some enquiry, it seems that all the room was cautiously shut 
down for electrical maintenance, but the maintenance crew managed to 
power on all the system in the mean time. probably afraid of doing so, 
tey shut down almost immediately. On my server this was during MBR 
reading. I beg some sort of surge took place on the disks heads, or 
enywhere else, end the MBR was written...


problem: this happenned in the middle of hollidays and the room was 
not accessible by me, so one week off...


there is nothing to be done against such things :-(((

jdd

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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread Carlos E. R.
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The Monday 2007-09-17 at 11:01 +0200, M9. wrote:

[ This is a conversation more appropiate for the normal or the security 
lists, I think ]


 In this case i let my router take security, by selecting which wireless
 pc's or laptops can enter the network.
 Until now this allways worked.
 If i add a new wireless one, i have to give it permission in my router.
 It will see the network, but will not be able to acces it.

By which method do you allow a new PC? For instance, if you do it based on 
the hardware address of the new wireless device, that's very easy to 
break.

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   Carlos E. R.

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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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jdd schreef:
 M9. wrote:

 so something must have been done, evidently accidentally :-).

 Indeed, but not by me, and there is no-one else that uses this pc...

 what one can do accidentally is unlimited :-(. This can (just a guess)
 be the result of a powerdown at the worst moment

This might be possible.
I could have turned the power button off, while the pc was shutting down.
You get a black screen before the log starts..
I remember that when i turned it on again the next day, it started
immediately without me pushing the start button... :-(



 I have an hosted server (physically hosted by an university) that
 couldn't boot after an unwanted power down.  typing lilo at the rescue
 prompt was enough to restore the boot sector.

 after some enquiry, it seems that all the room was cautiously shut down
 for electrical maintenance, but the maintenance crew managed to power on
 all the system in the mean time. probably afraid of doing so, tey shut
 down almost immediately. On my server this was during MBR reading. I beg
 some sort of surge took place on the disks heads, or enywhere else, end
 the MBR was written...

 problem: this happenned in the middle of hollidays and the room was not
 accessible by me, so one week off...

 there is nothing to be done against such things :-(((

 jdd

Yep, Shit happens:-((


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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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Carlos E. R. schreef:

 The Monday 2007-09-17 at 11:01 +0200, M9. wrote:

 [ This is a conversation more appropiate for the normal or the security
 lists, I think ]


 In this case i let my router take security, by selecting which wireless
 pc's or laptops can enter the network.
 Until now this allways worked.
 If i add a new wireless one, i have to give it permission in my router.
 It will see the network, but will not be able to acces it.

 By which method do you allow a new PC? For instance, if you do it based on
 the hardware address of the new wireless device, that's very easy to
 break.


It is very simple in fact,a pc or laptop not listed gets no ip...


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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread Carlos E. R.
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The Monday 2007-09-17 at 16:32 +0200, M9. wrote:

  By which method do you allow a new PC? For instance, if you do it based on
  the hardware address of the new wireless device, that's very easy to
  break.
 
 
 It is very simple in fact,a pc or laptop not listed gets no ip...

Don't you bet on it for a second.

A cracker can make his PC look like one of yours and connect, instantly.

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   Carlos E. R.

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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread jdd

Carlos E. R. wrote:


A cracker can make his PC look like one of yours and connect, instantly.


that is a cracker can guess your wep key (don't ask me how :-(), at 
the moment lurking the net gives him the mac adresse of the various hosts.


at the moment one of these hosts stops, he can use the mac to get an 
ip, he can also share the IP (but it's probably marginally more difficult)


the problem is: why should a cracker do this on your network? If this 
was one of a big company or if your work is highly important, may be.


may be also an evil neigbor

I beg some sort of malfunction is more likely to happen...

jdd


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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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Carlos E. R. schreef:
 
 The Monday 2007-09-17 at 16:32 +0200, M9. wrote:
 
 By which method do you allow a new PC? For instance, if you do it based on
 the hardware address of the new wireless device, that's very easy to
 break.

 It is very simple in fact,a pc or laptop not listed gets no ip...
 
 Don't you bet on it for a second.
 
 A cracker can make his PC look like one of yours and connect, instantly.

Well, as a matter of fact, in my case, this is not as simple as you
suggest..
I live in the middle of nowhere..
Neighbours i have two, a quarter of an hour walk from me..
If you see the place, it look so ancient, that most people who visit me
are very surprised that the inside is very up to date..
They did not expect to find fast ethernet, and many pc's and laptops
that are very recent..
In my place there is no electricity, no gas, no water, no sewer..
Al this is selfmade, and selfcontroled.
If somebody would come so close, that the wireless would pick him, i
would have picked him before that, and if he/she would not come to visit
me, he/she would have no business here.. ;-)

Thnx for your concern ;-)





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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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jdd schreef:
 Carlos E. R. wrote:
 
 A cracker can make his PC look like one of yours and connect, instantly.
 
 that is a cracker can guess your wep key (don't ask me how :-(), at the
 moment lurking the net gives him the mac adresse of the various hosts.
 
 at the moment one of these hosts stops, he can use the mac to get an ip,
 he can also share the IP (but it's probably marginally more difficult)
 
 the problem is: why should a cracker do this on your network? If this
 was one of a big company or if your work is highly important, may be.
 
 may be also an evil neigbor
 
 I beg some sort of malfunction is more likely to happen...
 
 jdd


I guess also, i have no valuable secrets stored on the pc's, nor am i rich.
My house is not protected, there is no need, most people are to afraid
to come by at night.
If one would reach the house, he would stumble and fall, because there
is no light, and it is full of rocks and trees.

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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread M9.
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jdd schreef:
 M9. wrote:

 If one would reach the house, he would stumble and fall, because there
 is no light, and it is full of rocks and trees.

 seems lovely :-))

It is indeed, it is an old farmhouse, about 350 years old..


 and you get adsl there? your are lucky :-)

Yep the telephone transformer is only 6km from the house, and the last
piece there are only 3 people on the line ;-)
Yeah, it is pretty cool living here...
Nobody can shut me off whatever function if i did not pay the bill in
time ;-) (gas, water, electra)

 jdd



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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread Carlos E. R.
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The Monday 2007-09-17 at 17:03 +0200, jdd wrote:

 
 Carlos E. R. wrote:
 
  A cracker can make his PC look like one of yours and connect, instantly.
 
 that is a cracker can guess your wep key (don't ask me how :-(), at the moment
 lurking the net gives him the mac adresse of the various hosts.

Yes, but he didn't say if he is using wep. My point is, that basing 
security only in giving IPs to known machines, using the hardware address, 
is not secure. Added to other methods, yes.

And wep... I was told of an ISP technician that installed all routers in 
his area withe keys of the 012345678901234567890xx type, the last to 
digits being related to the customer. The customers were happy because 
they had a long key that was easy to remember. The crackers were even 
happier.


 the problem is: why should a cracker do this on your network? If this was one
 of a big company or if your work is highly important, may be.
 
 may be also an evil neigbor

Or one without ISP, and just wanting to send his emails free. I have a 
friend in that case.

Somebody told me that once he tested his neighbors wifi network, and got 
in easily. He then captured the traffic, and managed to learn his bank 
login and password - shame on the bank for sending that in clear -. He 
even tested it by entering the bank account, and exited. Obviously, that 
neighbor was using windows. He said that, had he being malign, he would 
have connected to the bank from a second neighbor network, and sent the 
money to a third one: there would be no way to track him, and the police 
would blame the second neighbor.


Anyway, M9 doesn't have neighbors, so he probably doesn't those problems :-)

- -- 
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   Carlos E. R.
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Re: [opensuse-factory] Firewall not consistent..

2007-09-17 Thread Carlos E. R.
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The Monday 2007-09-17 at 17:12 +0200, M9. wrote:

  A cracker can make his PC look like one of yours and connect, instantly.
 
 Well, as a matter of fact, in my case, this is not as simple as you
 suggest..
 I live in the middle of nowhere..
...

Sounds a beautiful place :-)


 Thnx for your concern ;-)

Welcome :-)

You know that there are handheld gadgets that you carry in your pocket 
when you have a walk and beep or buzz when they detect a wifi. I have been 
told of people doing it in their cars, putting a special aerial with a 
magnet on the car roof. They can use a portable computer running a certain 
windows program that detects the networks it finds, and writes all that in 
a report. Plus, if connected to a GPS and a map software, it plots the 
findings in the map, with colors showing how kind are the neighbors.

The person that told me this said that they were thinking on doing this 
for their final project on university, and had a round of the industrial 
park here with that setup. The findings were very /interesting/, but 
refrained from making them public.

But I had seen a similar report  published in an article by the IEEE, it 
wasn't news to me.


Not your case, but people should be way more cautious with their wifis. On 
another message I wrote a sample of what damage can get done to such 
trusting users.

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   Carlos E. R.
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Re: [opensuse-factory] Firewall not consistent..

2007-09-15 Thread jdd

M9. wrote:


In my config there are only trusted hosts...
(in a windows case there are constantly hosts that are informed


informed?


yes it has to let me know who is going out and going in, and i must be
able to shut whatever port i like, in principle..


this is not a firewall but a proxy server.

Usually, a firewall blocks all the ports. That means that no 
communication can be initiated from the exterior to the inside. If 
inside your computer you ask an application to go and search, this is 
allowed.



If some host wants to enter my pc, i want to know this,


what does this mean for you??

all what an external program can do on your computer is read a port or 
write a port.


closing a port means only that this write is rejected (or simply 
ignored). In fact, if no application is listening (by reading this 
port), the write *is* ignored



If i give a password to a host, it can enter without noticing me, as
long as i want to let the firewall exept the password.


this may be the windows way of life, but it's not Linux one. if I do 
ssh somecomputer, my ssh will try to write to the ssh port of this 
computer. If, for example, it's a windows 98 with no firewall at all, 
but with no ssh server neither, nothing is going on and I cannot enter


to enter a computer you must have a server that allows this


A good firewall can handele this perfectly, with just one card.


nope. 	untrusted pc can  attack a trusted one. This is like having all 
computers exposed to the exterior and youi have to protect all of them



As i understand, only for the ports used by samba for the LAN?


well, the windows smb implementation seems to be programed in an evil 
way and don't use always the same ports, so one must let many ones 
open (that is may listen to these ports and answer to them) and this 
is unsecure.





 use of samba server on suse fixes the permission problem.


Samba server i did not use before...


how did you grant access to your linux computer from windows then?

access must be done on the host:

* by a standard protocol (smb, ssh, ftp, http...) accepted by a server
* by two applications sharing the same port

anyway, if you had a working config one day, and now it's no more 
working, there is to have been a change in between :-)


jdd

jdd

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Re: [opensuse-factory] Firewall not consistent..

2007-09-15 Thread M9.
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jdd schreef:
 M9. wrote:
 
 In my config there are only trusted hosts...
 (in a windows case there are constantly hosts that are informed
 
 informed?

spyware and datamining.. ;-)
( i know this is unknown to linux :-)

 
 yes it has to let me know who is going out and going in, and i must be
 able to shut whatever port i like, in principle..
 
 this is not a firewall but a proxy server.

no, in windows, a firewall can do that..
 
 Usually, a firewall blocks all the ports. That means that no
 communication can be initiated from the exterior to the inside. If
 inside your computer you ask an application to go and search, this is
 allowed.
 
 If some host wants to enter my pc, i want to know this,
 
 what does this mean for you??

that my spyware-killers do not work.. (please do not forget my decade of
windows use ;-)

 
 all what an external program can do on your computer is read a port or
 write a port.
 
 closing a port means only that this write is rejected (or simply
 ignored). In fact, if no application is listening (by reading this
 port), the write *is* ignored
 
 If i give a password to a host, it can enter without noticing me, as
 long as i want to let the firewall exept the password.
 
 this may be the windows way of life, but it's not Linux one. 

indeed, some habits die hard ;-)

if I do
 ssh somecomputer, my ssh will try to write to the ssh port of this
 computer. If, for example, it's a windows 98 with no firewall at all,
 but with no ssh server neither, nothing is going on and I cannot enter
 
 to enter a computer you must have a server that allows this
 
 A good firewall can handele this perfectly, with just one card.
 
 nope. untrusted pc can  attack a trusted one. This is like having
 all computers exposed to the exterior and youi have to protect all of them

my router is a firewall, and all PC's and laptops have one..
 
 As i understand, only for the ports used by samba for the LAN?
 
 well, the windows smb implementation seems to be programed in an evil
 way and don't use always the same ports, so one must let many ones open
 (that is may listen to these ports and answer to them) and this is
 unsecure.
 

  use of samba server on suse fixes the permission problem.

 Samba server i did not use before...
 
 how did you grant access to your linux computer from windows then?

Sorry, it is the client and the server, i thought of an aplication like
server-edition.. euh..errr..;-)

 
 access must be done on the host:
 
 * by a standard protocol (smb, ssh, ftp, http...) accepted by a server
 * by two applications sharing the same port

yes that is the procedures..

 
 anyway, if you had a working config one day, and now it's no more
 working, there is to have been a change in between :-)

Offcourse there has to be a change to change something.
In this case i did not change a thing.
Why should i?
It worked, and i never change something that does its job well..

again, that is why i call the firewall inconsistant..


If it is too much trouble to config it right, i shut it off, no big
deal..(router is sufficient, and one pc can use DHZ )

- --


Have a nice day,

M9.   Now, is the only time that exists.



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Re: [opensuse-factory] Firewall not consistent..

2007-09-15 Thread jdd

M9. wrote:


informed?


spyware and datamining.. ;-)
( i know this is unknown to linux :-)


if you let your computer infected, there is nothing a firewall can do. 
it should be some sort of apparmor for Windows, monitoring wich 
application do what. It's not the scope of a firewall and 
SuSEfirewall2 never protected your agianst such thing, anyway if the 
spy uses a classic internet protocol (http), you can only cry :-(



no, in windows, a firewall can do that..


then it have some functions more than a firewall


that my spyware-killers do not work.. (please do not forget my decade of
windows use ;-)


they should. In France, secuser.com links to free spyware defender, 
very effective. I have an XP box, no firewall on it and never infected 
(never for a longtime, though)



Sorry, it is the client and the server, i thought of an aplication like
server-edition.. euh..errr..;-)


default openSUSE install are usually quite defensives and allow little 
open ports and little running servers (I'm not even sure that sshd is 
running by default)





access must be done on the host:

* by a standard protocol (smb, ssh, ftp, http...) accepted by a server
* by two applications sharing the same port


yes that is the procedures..


so what is the server you fear to be broken?


Offcourse there has to be a change to change something.
In this case i did not change a thing.
Why should i?
It worked, and i never change something that does its job well..

again, that is why i call the firewall inconsistant..


If it is too much trouble to config it right, i shut it off, no big
deal..(router is sufficient, and one pc can use DHZ )


yes it is.

however no firewall and certainly not on Linux can change by itself 
:-), so something must have been done, evidently accidentally :-).


what you could do is:

* backup the /etc/sysconfig folder (it's small , do a complete backup 
of it)

* do SuSEfirewall2 stop to stop the firewall
* remove the /etc/sysconfig/SuSEfirewall2
* in yast, force the reinstall of the firewall, like this you should 
recover the default config file


hope this works
jdd

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Re: [opensuse-factory] Firewall not consistent..

2007-09-15 Thread joe
jdd wrote:
 M9. wrote:

 no, in windows, a firewall can do that..
 
 then it have some functions more than a firewall


Linux firewalls can do all that and much more. Your imagination is the limit,
once you start looking into the iptables commands and options.

Don't let the fact that SuSEfirewall2 is only a very rudimentary and limited
graphical shell for a subset of those commands fool you.

Joe
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Re: [opensuse-factory] Firewall not consistent..

2007-09-15 Thread Rajko M.
On Saturday 15 September 2007 12:38:53 pm jdd wrote:
 M9. wrote:
  informed?
 
  spyware and datamining.. ;-)
  ( i know this is unknown to linux :-)

Not yet, but when LSB kick in and it would be easy to install any program to 
any distro, situation may change. 

 if you let your computer infected, there is nothing a firewall can do.
 it should be some sort of apparmor for Windows, monitoring wich
 application do what. 

That is what most 'firewalls' for windows do. 
They call it firewall, as it sounds good, but it is actually proxy that 
monitors all traffic.  

...
 default openSUSE install are usually quite defensives and allow little
 open ports and little running servers (I'm not even sure that sshd is
 running by default)

It is not enabled by default.  

  access must be done on the host:
 
  * by a standard protocol (smb, ssh, ftp, http...) accepted by a server
  * by two applications sharing the same port
 
  yes that is the procedures..

 so what is the server you fear to be broken?
...

Don't forget that there is few computers in M9 network wireless. and problem 
can come from that side too. They are part of internal network, they probably 
have enabled ad hoc wireless and if some neighbor has no wireless access 
point it can without knowing what he is doing connect to any windows 
computers in range. If he has viruses they will find the way in. Taking how 
easy most of windows users dismiss firewall popups it opens unlimited 
possibilities. 

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Rajko.
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Re: [opensuse-factory] Firewall not consistent..

2007-09-15 Thread Carlos E. R.
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The Saturday 2007-09-15 at 19:38 +0200, jdd wrote:

 default openSUSE install are usually quite defensives and allow little open
 ports and little running servers (I'm not even sure that sshd is running by
 default)

The sshd daemon is intalled and runs, but the port is left closed in the 
firewall, if I remember correctly. Every port is left closed.

 what you could do is:
 
 * backup the /etc/sysconfig folder (it's small , do a complete backup of it)
 * do SuSEfirewall2 stop to stop the firewall
 * remove the /etc/sysconfig/SuSEfirewall2
 * in yast, force the reinstall of the firewall, like this you should recover
 the default config file

I think he can simply copy over the default from the 
'/var/adm/fillup-templates/sysconfig.SuSEfirewall2' file.

- -- 
Cheers,
   Carlos E. R.
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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread jdd

M9. wrote:


(it is like this firewall does the opposite job..)


I don't really see how your net is configured.

My firewall is on the router/gateway, not on my desktop.

my desktop access is only managed by the ordinary permission system 
(anyway all the ports are shut down except ssh)


jdd


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[opensuse-factory] Firewall not consistent..

2007-09-14 Thread M9.
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Hi,

This morning i had to shut down the firewall to enter my Lan.
Printing was impossible, and also accessing the other pc's and laptops
in the network.

What i do not understand is why this firewall prevents me from entering
other pc's in the network, while others can acces mine easily?

When are we going to have a configurable firewall?
Like:

Share Files and printers?   x Yes  0 No

Trusted hosts:

Untrusted hosts:

etc etc.

I do not like a firewall that does not what it is supposed to..
It should not limit *my* access to the network..
and grant others to my pc..
(it is like this firewall does the opposite job..)

- --


Have a nice day,

M9.   Now, is the only time that exists.



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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread Carlos E. R.
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The Friday 2007-09-14 at 11:01 +0200, jdd wrote:

 
  (it is like this firewall does the opposite job..)
 
 I don't really see how your net is configured.
 
 My firewall is on the router/gateway, not on my desktop.
 
 my desktop access is only managed by the ordinary permission system (anyway
 all the ports are shut down except ssh)

Even in that case, I like to use a firewall protecting me from the 
internal network.

- -- 
Cheers,
   Carlos E. R.

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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread M9.
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jdd schreef:
 M9. wrote:
 
 (it is like this firewall does the opposite job..)
 
 I don't really see how your net is configured.
 
 My firewall is on the router/gateway, not on my desktop.
 
 my desktop access is only managed by the ordinary permission system
 (anyway all the ports are shut down except ssh)
 
 jdd

I am talking about the SuSE-firewall... and the testing of it in 10.3
beta3..

(offcourse i can also use the routers firewall..)

 
 

- --


Have a nice day,

M9.   Now, is the only time that exists.



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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread M9.
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Carlos E. R. schreef:
 
 The Friday 2007-09-14 at 11:01 +0200, jdd wrote:
 
 (it is like this firewall does the opposite job..)
 I don't really see how your net is configured.
 
 My firewall is on the router/gateway, not on my desktop.
 
 my desktop access is only managed by the ordinary permission system (anyway
 all the ports are shut down except ssh)
 
 Even in that case, I like to use a firewall protecting me from the 
 internal network.
 

Well, if my sons and wife can enter my PC, and their config is adjusted
to share files, and the printer is shared, than i expect to get access
to their pc's.
If SuSE's firewall denies entrance to other pc's, but grants these same
pc's to enter my pc, than something is wrong, it is that simple.
And as far as SuSE's firewall is concerned, from 10.0 it has caused
unaccesible lan. only accessible if the network interface was changed to
the internal zone..
In Beta 3, i moved the network interface to internal zone: no network
access.
I moved it to the external zone again: Network access.
So i thought: Fixed!
Wrong.
I know that i can choose whatever firewall i want to use..
It is just that if SuSE has one of its own, it should be easier to use
that one, am i wrong here?

In an earlier mail i stated that the fault was gone, this was a mistake.
None config wse changed,



- --


Have a nice day,

M9.   Now, is the only time that exists.



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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread jdd

M9. wrote:


I am talking about the SuSE-firewall... and the testing of it in 10.3
beta3..


me too. My router is an openSUSE box.

myconcern is to know how is your lan configured (what PC is used as 
gateway, what is the internal network, what the external (precise, 
with IP's, thanks)


and if possible, what are the differences between the default 
SUSEFirewall2 (/etc/sysconfig/scripts/SuSEfirewall2) script and the 
one you use


only to help you :-)

jdd


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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread M9.
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Alberto Passalacqua schreef:
 It is probably the old and never solved issue with samba high ports, if
 you're using samba to share resources.
 
 In the suse firewall configuration file, look for FW_SERVICES_ACCEPT_EXT
 and set it to:
 
 0/0,tcp,1024:65535,137:139 0/0,udp,1024:65535,137:139
 
 This issue have been affecting SuSE for a lot of time, and it's time to
 find a solution, without hiding behind security reasons or other
 solutions (like using two cards ;-)) as it was done in the past.
 
 With kind regards,
 Alberto
 
 

This one i did not know ;-)
I am going to try it imediately, thnx.

Still i agree that the issue should be solved..

Imagine what is attached to this:
1) The printer is behind a windowsbox = Samba
2) Al the movies and music are on a networkdrive, for everybodies
convienience, except the ones who use SuSE..= Samba
3) Shared files are in shared windows docs..= Samba

For all this samba is *normaly* spoken the way
(i mean without hacking into someones files...)
Like for people coming from widnose, and are used to everything is
configured automaticly, they would not know a solution like Alberto
proposes here ;-)

- --


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M9.   Now, is the only time that exists.



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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread M9.
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jdd schreef:
 M9. wrote:
 
 I am talking about the SuSE-firewall... and the testing of it in 10.3
 beta3..
 
 me too. My router is an openSUSE box.
 
 myconcern is to know how is your lan configured (what PC is used as
 gateway, what is the internal network, what the external (precise,
 with IP's, thanks)
 
 and if possible, what are the differences between the default
 SUSEFirewall2 (/etc/sysconfig/scripts/SuSEfirewall2) script and the one
 you use
 
 only to help you :-)
 
 jdd

I am using a level-one wireless router as gateway, behind a tomson
speedtouch adsl-modem. They are both configured to fit as one, and
function without any error for many years, except for some wireless-card
problems, and windows SP2 updates, which throw the network down every
once in a while...

PC's and Laptops in daily use, some pc's have wireless cards.
tribal is the 64bits AMD 2800+, to test all Linux version i like, the
ibm is the 32bits P4 testbox, (for the night-time), with windows for the
accessability from all other windows-boxes, all production machines...

terminator 192.168.1.9 (WLAN)(Fixed)
ibm-sfn3 192.168.1.7 (LAN) (DHCP)
IslandDreamer 192.168.1.4 (WLAN) (Fixed)
tine-toshi 192.168.1.5 (WLAN) (Fixed)
piii-sfn5 192.168.1.10 (WLAN) (Fixed)
tribal-sfn2 192.168.1.8 (LAN) (DHCP)
Networkdrive 192.168.1.2 (LAN) (Fixed)
TOSP200 192.168.1.3 (WLAN) (DHCP)
asus-sfn6 192.168.1.6 (WLAN) (Fixed)

The printer is behind ibm-sfn2, configured as:
smb://192.168.1.*/EPSONSty (exact name from MSXP)
For this printer, an Epson Stylus C64 Photo edition, is no printserver
available, so i have to hang it behind a box.
In the start, tribal-sfn2 was the server, and main pc, but since the
trouble with the firewall (and the scanner), which started with SuSE
10.0, several years ago, ibm carries this burdon...

The MS boxes use an old and free Norton firewall:sygate

About /etc/scripts/SuSEfirewall2, there are many files there, i do not
know which one you want to see.

I use the gui's in yast to configure the firewall, and that should be
more than enough.
IMHO should a firwall be configured once, and work in silence,
protecting  a pc or laptop against attack fro 'outside'.
It should not block the trusted hosts, and block the untrusted ones.
A warning should be displayed, with an option to grant or denie an
attempt to enter the pc, with a discription of the host and the ip
adress, so that one can decide to let pass once or forever, which does
not mean that 'forever' can not be changed to denie.

A realy good firewall can work with passwords, just as a server can.

this is all the info i can think of, is from any use..



 
 

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Have a nice day,

M9.   Now, is the only time that exists.



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Re: [opensuse-factory] Firewall not consistent..

2007-09-14 Thread jdd

M9. wrote:

so, if I understand well you have only one lan (192.168.1.x) with all 
the PC on it.


previously you said:

This morning i had to shut down the firewall to enter my Lan.
Printing was impossible, and also accessing the other pc's and laptops
in the network.

What i do not understand is why this firewall prevents me from entering
other pc's in the network, while others can acces mine easily?

It looks like you (or any event) swapped the internal and external 
network in the config


try setting with defaults - usually defaults are good


About /etc/scripts/SuSEfirewall2, there are many files there, i do not
know which one you want to see.


it's not a folder but a file in my computer (but the one I have just 
at hand is a 10.1, may be the file was spread in several ones later)


this file is commented internally, and the comments are the only 
firewall notice I know of



IMHO should a firwall be configured once, and work in silence,
protecting  a pc or laptop against attack fro 'outside'.


it's what SuSEfirewall2 do usually :-)


It should not block the trusted hosts, and block the untrusted ones.


not clear in your config wich is what


A warning should be displayed, with an option to grant or denie an
attempt to enter the pc, with a discription of the host and the ip
adress, so that one can decide to let pass once or forever, which does
not mean that 'forever' can not be changed to denie.


it's really too easy to clic on yes without caution and very 
difficult to go back after, and should any user be allowed to do so?




A realy good firewall can work with passwords, just as a server can.


I think somewhat your definition of firewall is wrong. a firewall is 
used to open or close ports, not communication (your firewalls don't 
do NAT, as you have an other router).


whatever you do with these ports is irrelevant.

a firewall works at the packet level, not at the logical one, it knows 
nothing of passwords. It protect networks, so if you want a part with 
trusted pc, it must be the internal and untrusted the external or the 
dmz if they are in your house, but this needs an other net card (an 
other lan).


you can set some filtering based on IP, but I'm not sure it's secure 
and anyway it's difficult to setup.


finally you said This morning i had to shut down the firewall to 
enter my Lan., so the day before the firewall was nice, what did 
change in between?


I beg you use an samba network and windows samba is buggy and needs to 
open nearly anything to work as was said from the beginning by an 
other writer.


http://lists.opensuse.org/opensuse-factory/2007-09/msg00335.html

but if I understand well, doing so is nearly the same as stopping the 
firewall.


 use of samba server on suse fixes the permission problem.

jdd

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