Hi,
I am a student working as a lab assistant in my institute. We are
facing some real prob. with respect to the proxy server/gateway over here.
The proxy server also acts as a gateway. Now this problem is mainly
concerned with usage of Yahoo messenger.
Initially we had only proxy server. Now in order to enable yahoo to
connect without proxy server we enabled the yahoo port (5050) through
iptables (nat).
This worked fine for some days. But after some days whenever we used to
enable nat thru iptables, the CPU utilization used to become 100% and the
pc used to hang.
We did tcpdump and found that we were getting too many ICMP requests. This
seems to be because of the worm "W32.Welchia.Worm" which is spread in our
network.
We tried cleaning this worm but to no use. Now I got two quesions ...
(1) Now assuming that it is not possible to clean that worm from the
network, is it possible for me to setup rules in iptables so that all the
ICMP requests generated by that worm are ignored ???
(2) Secondly Yahoo messenger does work thru proxy server but it is
extremelyyyyyyy slow. So is it possible to do some setting in the proxy
server ... so that Yahoo works faster !!!
SOMEONE PLZZ HELP ME OUTTT !!!
- Rahul.
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