[Gllug] ftp / iptables

Paul Brazier pbrazier at cosmos-uk.co.uk
Tue Oct 30 11:46:22 UTC 2001


> Looking at /var/log/messages there were packets from 
> client:high to server:53
> and 
> client:113 to server:high
> port 113 is for authentication - not sure where this is from 

Just found something on this - it seems port 113 is used to see who is
connecting by some services such as irc, ftp, smtp. This just introduces
a ~30s delay though so I think the DNS is causing the overall failure to
connect.
I'll see if proftpd can be set to not try to authenticate via port 113,
unless this is a security risk, in which case I'll try opening port 113
for established connections.


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