Re: [Full-disclosure] Server Redundancy

[wac]

Hi:Thanks I'll check ipvs.RegardsWaldoOn 8/10/06, Tim Hecktor <
[EMAIL PROTECTED]> wrote:




Hello,
 
> DiG 9.2.1 <<>> 
ftp.freenet.de;; global options:  
printcmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: 
NOERROR, id: 59136;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 3, 
ADDITIONAL: 3
 
;; QUESTION 
SECTION:;ftp.freenet.de.    
IN  A
 
;; ANSWER SECTION:ftp.freenet.de
. 
1457    IN  CNAME   
ftp-0.freenet.de.
ftp-0.freenet.de.   
600 IN  
A   
194.97.2.69
ftp-0.freenet.de.   
600 IN  
A   
194.97.2.70
ftp-0.freenet.de.   
600 IN  
A   
194.97.2.67
ftp-0.freenet.de.   
600 IN  
A   194.97.2.68 
 
This will map a name to more than one ip and will give you 
load-balancing this way, but not real redundancy.
To map a service to different hosts redundant you can use a 
box running ipvs. This box can be made redundant with a identical box using 
mon and heartbeat to do ip failover.
 
Best regards,

Tim Hecktor 


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Re: [Full-disclosure] Server Redundancy

[Siim Põder]

Yo!

wac wrote:
> Isn't there a way to map a name to several IPs?
> Or use aliases?
> I'm interested in the subject because I want to do the same thing.

read this: http://www.supersparrow.org/ss_paper/

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Re: [Full-disclosure] Server Redundancy

[h3rcul3s]

Hi,
Yes.You may have to think about clustering.
Regards

On Thu, 10 Aug 2006 06:34:50 -0400, "wac" <[EMAIL PROTECTED]>
said:
> Hi:
> 
> Isn't there a way to map a name to several IPs?
> Or use aliases?
> I'm interested in the subject because I want to do the same thing.
> 
> Regards
> Waldo
> 
> On 8/9/06, Gary E. Miller <[EMAIL PROTECTED]> wrote:
> >
> > -BEGIN PGP SIGNED MESSAGE-
> > Hash: SHA1
> >
> > Yo Sec!
> >
> > On Wed, 9 Aug 2006, Sec Bas wrote:
> >
> > > I was thinking about doing this with Dynamic
> > > DNS and using rsync to replicate changes.
> >
> > Dynamic DNS will not provide the response you are looking for.  Many
> > browsers cache DNS for 30 mins or more regardless of your TTL.  Many
> > ISPs cache DNS for a day or two regardless of your TTL.  My expererience
> > is that it takes up to 2 days before a DNS change fully propogates even
> > with a TTL of 5 mins.  In some pathological cases I have seen it take 6
> > months.
> >
> >
> > RGDS
> > GARY
> > -
> > ---
> > Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701
> > [EMAIL PROTECTED]  Tel:+1(541)382-8588
> >
> > -BEGIN PGP SIGNATURE-
> > Version: GnuPG v1.4.3 (GNU/Linux)
> >
> > iD8DBQFE2oNg8KZibdeR3qURArlxAJ49KBVwNqLDrDPkUzjvg0FmzIKt1gCg4AMb
> > 72lChX0rNrr+zyVeH72SR58=
> > =b2wW
> > -END PGP SIGNATURE-
> >
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Re: [Full-disclosure] Server Redundancy

[wac]

Hi:Isn't there a way to map a name to several IPs?Or use aliases?I'm interested in the subject because I want to do the same thing.RegardsWaldoOn 8/9/06, 
Gary E. Miller <[EMAIL PROTECTED]> wrote:-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1Yo Sec!On Wed, 9 Aug 2006, Sec Bas wrote:> I was thinking about doing this with Dynamic> DNS and using rsync to replicate changes.Dynamic DNS will not provide the response you are looking for.  Many
browsers cache DNS for 30 mins or more regardless of your TTL.  ManyISPs cache DNS for a day or two regardless of your TTL.  My expererienceis that it takes up to 2 days before a DNS change fully propogates even
with a TTL of 5 mins.  In some pathological cases I have seen it take 6months.RGDSGARY- ---Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701
[EMAIL PROTECTED]  Tel:+1(541)382-8588-BEGIN PGP SIGNATURE-Version: GnuPG v1.4.3 (GNU/Linux)iD8DBQFE2oNg8KZibdeR3qURArlxAJ49KBVwNqLDrDPkUzjvg0FmzIKt1gCg4AMb
72lChX0rNrr+zyVeH72SR58==b2wW-END PGP SIGNATURE-___Full-Disclosure - We believe in it.Charter: 
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Re: [Full-disclosure] Server Redundancy

[Gary E. Miller]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Yo Sec!

On Wed, 9 Aug 2006, Sec Bas wrote:

> I was thinking about doing this with Dynamic
> DNS and using rsync to replicate changes.

Dynamic DNS will not provide the response you are looking for.  Many
browsers cache DNS for 30 mins or more regardless of your TTL.  Many
ISPs cache DNS for a day or two regardless of your TTL.  My expererience
is that it takes up to 2 days before a DNS change fully propogates even
with a TTL of 5 mins.  In some pathological cases I have seen it take 6
months.


RGDS
GARY
- ---
Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701
[EMAIL PROTECTED]  Tel:+1(541)382-8588

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Version: GnuPG v1.4.3 (GNU/Linux)

iD8DBQFE2oNg8KZibdeR3qURArlxAJ49KBVwNqLDrDPkUzjvg0FmzIKt1gCg4AMb
72lChX0rNrr+zyVeH72SR58=
=b2wW
-END PGP SIGNATURE-

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[Full-disclosure] Server Redundancy

[Sec Bas]

Hi

I'm setting up a redundant server. Both servers are connected to the
Internet in different data centers. My needs are to have one of the
servers mirroring the another one, with traffic going to one of them,
and, when the active server goes down, traffic should be temporarly
sent to the other server. I was thinking about doing this with Dynamic
DNS and using rsync to replicate changes. Does someone has some
experience they can share in this area? Or if you have insight I would
really like to hear about it.

Thanks.

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