spamassassin 2.54 released

Spicer, Kevin Kevin.Spicer at BMRB.CO.UK
Fri May 16 11:14:36 IST 2003

> No. (Most) statefull firewall don't keep UDP states because 
> UDP is not a
> connection oriented protocol and thus doesn't have any state.
> Statefull firewalls build their state table based on SYN-packets and
> those are not present in UDP.

Yes and No.  Whilst this is probably true for some firewalls my experience is that both  Checkpoint FW-1 and Linux IP tables (set up with shorewall - which rocks btw) manage to cope with replies to UDP packets quite nicely.  I assume that the firewall tracks outgoing packets destination IP and port then permits traffic from that location back to the originator for a certain period (but I'm guessing!)

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