ports/protocol through firewall

Russ Allbery rra at stanford.edu
Mon Apr 25 17:41:30 UTC 2005

Bill Tangren <bjt at aa.usno.navy.mil> writes:

> I run an nntp server (inn-2.4.1 compiled from source), on a RHEL ES4
> machine, behind a firewall (that I don't control). I have configured the
> server to accept secure (SSL) connections on port 563. Access to this
> server on this port behind the firewall works fine. I asked the firewall
> admin to open port 563 for nntps traffic. He opened port 563 for tcp
> traffic only. From outside the firewall, I cannot get access to the news
> server.

> Does anyone know if it is necessary to allow udp traffic as well for inn
> to work over SSL?

No, it's not.  Are you sure that your client is connecting directly to
port 563 and not trying to connect to 119?

Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>

    Please send questions to the list rather than mailing me directly.
     <http://www.eyrie.org/~eagle/faqs/questions.html> explains why.

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