Subba Rao wrote:
> I cannot go out to the Web nor resolve any DNS names. Mail will not go out.
> My system does have a small DNS which forwards requests to my ISP's nameserver.
> Nothing really works.
[snip]
> ipchains -A input -i ppp0 -p UDP -s I.S.P.NS -d $LOCALIP 53 -j ACCEPT
> ipchains -A input -i ppp0 -p UDP -s I.S.P.NS1 -d $LOCALIP 53 -j ACCEPT
These two rules are both assuming that DNS requests are going out with a
source port of 53. Quite often nowadays DNS uses non-privileged source
ports (ie, not < 1024) so this might be what's breaking DNS. If DNS is
broken, that probably doesn't help web or mail traffic. :-/
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