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Legacy Forums => Experienced User Forum => Topic started by: Rob on May 10, 2002, 03:57:54 AM

Title: Port 113 open - why?
Post by: Rob on May 10, 2002, 03:57:54 AM

Hi

a port scan shows that port 113 is open from both sides. doea anyone know if this is "normal"?

If so what service is it providing?

TIA rob

Title: Re: Port 113 open - why?
Post by: Luke Drumm on May 10, 2002, 05:17:54 AM

A look into /etc/services reveals the following:

auth            113/tcp         authentication tap ident

My guess is that the ports used for one of the remote authentication services.

Title: Re: Port 113 open - why?
Post by: trbonja on May 10, 2002, 05:43:12 AM

It's indent that is running on 113. Mainly used by IRC servers. They won't let you connect (most of them) if you close this port

Title: Re: Port 113 open - why?
Post by: Rob on May 10, 2002, 01:15:31 PM

thanks

I have a stock 5.1.2
Is it meant to be open both sides.? or has this happened weirdly?
TIA  rob

Title: Re: Port 113 open - why?
Post by: Gordon Rowell on May 13, 2002, 07:54:12 AM

Most IRC and some SMTP servers wrongly require ident service. It's a silly
requirement as ident data cannot be trusted unless you control all boxes
involved in the transaction. However, not providing ident breaks access
to these servers.

See /etc/identd.masq for precisely how useful the information is to the
remote site :-)

Gordon