FC5 iptables issue

[Andy Green]

Scot L. Harris wrote:
> A while back I noted some unexpected entries being allowed through
> iptables in FC4 on a clean install.  I filed a bug report on this
> #181397.
> 
> It appears that FC5 still has similar issues.
> 
> 3    ACCEPT     esp  --  0.0.0.0/0            0.0.0.0/0
> 4    ACCEPT     ah   --  0.0.0.0/0            0.0.0.0/0
> 5    ACCEPT     udp  --  0.0.0.0/0            224.0.0.251         udp
> dpt:5353
> 6    ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           udp
> dpt:631
> 7    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp
> dpt:631
> 
> 
> I don't see any reason that  want to allow UDP traffic to port 5353.
> And I don't believe I want to allow traffic to port 631, no reason for
> anyone to be accessing the cups configuration from the network.

224 blah is some kind of routing multicast thing or somesuch IIRC, it's 
probably not evil.

port 631 is actually used to print stuff on cups, not just the config, 
that's probably why that's open.

No idea what esp and ah protocols are.

-Andy
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