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Special Forums IP Networking Facing issue in ip6table rule for port based routing management Post 302770383 by DGPickett on Friday 15th of February 2013 01:30:36 PM
Old 02-15-2013
There are many reasons fragmentation is not preferred, and here is another. Since packet fragmentation is an IP level function, the udp or tcp header is just payload, and it is only in the first fragment.

I suppose you could write a stateful version of the ip*table that caches the udp/tcp header and the routing or discard decision it received for fragmented packets. But it is possible for fragements to get out of order, so the first fragment might not arrive first.

A proxy firewall like socks would assemble packets before deciding to forward them or discard them, and if forwarded, they would be re-fragmented.
 

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PAM_ISSUE(8)							 Linux-PAM Manual						      PAM_ISSUE(8)

NAME
pam_issue - PAM module to add issue file to user prompt SYNOPSIS
pam_issue.so [noesc] [issue=issue-file-name] DESCRIPTION
pam_issue is a PAM module to prepend an issue file to the username prompt. It also by default parses escape codes in the issue file similar to some common getty's (using x format). Recognized escapes: d current day l name of this tty m machine architecture (uname -m) machine's network node hostname (uname -n) o domain name of this system release number of operating system (uname -r) current time s operating system name (uname -s) u number of users currently logged in U same as u except it is suffixed with "user" or "users" (eg. "1 user" or "10 users") v operating system version and build date (uname -v) OPTIONS
noesc Turns off escape code parsing. issue=issue-file-name The file to output if not using the default. MODULE TYPES PROVIDED
Only the auth module type is provided. RETURN VALUES
PAM_BUF_ERR Memory buffer error. PAM_IGNORE The prompt was already changed. PAM_SERVICE_ERR A service module error occurred. PAM_SUCCESS The new prompt was set successfully. EXAMPLES
Add the following line to /etc/pam.d/login to set the user specific issue at login: auth optional pam_issue.so issue=/etc/issue SEE ALSO
pam.conf(5), pam.d(5), pam(7) AUTHOR
pam_issue was written by Ben Collins <bcollins@debian.org>. Linux-PAM Manual 06/04/2011 PAM_ISSUE(8)
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