Tips on books about network security

2003-05-24 Thread Mat
Hi to everyone I'm looking for a book or some other reference (web sites, mailing lists...) that could introduce me to system/network administration (like logs or account management, FTP/APACHE/SAMBA servers configuration...) and network security (authentication, kerberos, SSH, VPN

Network security

2001-03-08 Thread pf
Hi, I have been playing around with kernel 2.4.2 lately, and suddenly my TCP packets get rejected by some firewalls with the error: TCP packet dropped (195.249.21.201-firewall.ao-vvs.dk[129.142.86.2]: Protocol=TCP[SYN 0xc0] Port 58355-25): Bad TCP flags combination (received on interface

Network security

2001-03-08 Thread pf
Hi, I have been playing around with kernel 2.4.2 lately, and suddenly my TCP packets get rejected by some firewalls with the error: TCP packet dropped (195.249.21.201-firewall.ao-vvs.dk[129.142.86.2]: Protocol=TCP[SYN 0xc0] Port 58355-25): Bad TCP flags combination (received on interface

Re: Network security

2001-03-08 Thread Tollef Fog Heen
* | This error is taken from a firewall branded Raptor or something. | Is the 2.4.2 kernel's TCP/IP stack non-standard, the firewall just plain | stupid, or is there a security problem somewhere?? Have you chosen to use 'Explicit Congestion Notification' when you compiled the kernel? If so,

Re: Network security

2001-03-08 Thread pf
On Thu, Mar 08, 2001 at 04:13:15PM +0100, Tollef Fog Heen wrote: Have you chosen to use 'Explicit Congestion Notification' when you compiled the kernel? If so, many firewalls and routers drop packages with this set. It bit me, and I couldn't find out what it was - look at whether

Re: Network security

2001-03-08 Thread Tollef Fog Heen
* | But a good one, it works!! | Thanks!! Nice to hear. :) | Now, I wonder why this problem occours. I'll have to take a look at some RFC | to figure out.. anyone who can point me in the right direction?? RFC 2481, iirc. -- Tollef Fog Heen Unix _IS_ user friendly... It's just selective

Re: Network security

2001-03-08 Thread Alexander Reelsen
On Thu, Mar 08, 2001 at 04:43:14PM +0100, [EMAIL PROTECTED] wrote: Now, I wonder why this problem occours. I'll have to take a look at some RFC to figure out.. anyone who can point me in the right direction?? Best would be to take a look at linux-net mailinglist archives or netfilter, the issue

[RFC] Network Security Policy (was Re: atd...)

2000-09-26 Thread Simon Huggins
On Tue, Sep 26, 2000 at 09:28:17AM +0100, Patrick Lambe wrote: That's dangerous ground to get into, there are always holes in *all* distributions, regardless of how quickly they're fixed. Yes. There was talk on this list before about being able to neatly disable network services. What would

Portmap removal, was Re: [RFC] Network Security Policy

2000-09-26 Thread David Wright
Quoting Simon Huggins ([EMAIL PROTECTED]): There used to be an annoying dependency that stopped portmap being removed at all. I think this has gone now (*removes portmap*) yep, but the policy of Debian IMHO wrt open ports/daemons enabled when installed etc. leaves something to be desired.

Re: [RFC] Network Security Policy (was Re: atd...)

2000-09-26 Thread Henrique M Holschuh
On Tue, 26 Sep 2000, Simon Huggins wrote: On Tue, Sep 26, 2000 at 09:28:17AM +0100, Patrick Lambe wrote: What would be nice would be The One True Way to know if a service was meant to be disabled or not. i.e. when I apt-get install new_network_daemon I want it to look at

Re: Portmap removal, was Re: [RFC] Network Security Policy

2000-09-26 Thread Peter Palfrader
Hi David! On Tue, 26 Sep 2000, David Wright wrote: Quoting Simon Huggins ([EMAIL PROTECTED]): There used to be an annoying dependency that stopped portmap being removed at all. I think this has gone now (*removes portmap*) yep, but the policy of Debian IMHO wrt open ports/daemons

[RFC] Network Security Policy (was Re: atd...)

2000-09-26 Thread Simon Huggins
On Tue, Sep 26, 2000 at 09:28:17AM +0100, Patrick Lambe wrote: That's dangerous ground to get into, there are always holes in *all* distributions, regardless of how quickly they're fixed. Yes. There was talk on this list before about being able to neatly disable network services. What would

Portmap removal, was Re: [RFC] Network Security Policy

2000-09-26 Thread David Wright
Quoting Simon Huggins ([EMAIL PROTECTED]): There used to be an annoying dependency that stopped portmap being removed at all. I think this has gone now (*removes portmap*) yep, but the policy of Debian IMHO wrt open ports/daemons enabled when installed etc. leaves something to be desired.

Re: [RFC] Network Security Policy (was Re: atd...)

2000-09-26 Thread Henrique M Holschuh
On Tue, 26 Sep 2000, Simon Huggins wrote: On Tue, Sep 26, 2000 at 09:28:17AM +0100, Patrick Lambe wrote: What would be nice would be The One True Way to know if a service was meant to be disabled or not. i.e. when I apt-get install new_network_daemon I want it to look at

Re: Portmap removal, was Re: [RFC] Network Security Policy

2000-09-26 Thread Peter Palfrader
Hi David! On Tue, 26 Sep 2000, David Wright wrote: Quoting Simon Huggins ([EMAIL PROTECTED]): There used to be an annoying dependency that stopped portmap being removed at all. I think this has gone now (*removes portmap*) yep, but the policy of Debian IMHO wrt open ports/daemons