RE: I thought ssh is port #22 ?!!

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Port 32873 is the return port on the ssh client.

Here's how it works. The server listens on port 22. The client opens a
connection to the server, and tells the server which return port to use. If
you do "netstat -an" you will see the server talking on port 22, and the
client talking on some high numbered port like 32873. The high number port
used is random. It will change from one session to the next.

This is true not just for ssh - it is true for most tcp applications.

Michael Martinez
Unix System Administrator

-----Original Message-----
From: cldavis@xxxxxxxxxxxxx [mailto:cldavis@xxxxxxxxxxxxx] 
Sent: Wednesday, March 31, 2004 9:10 PM
To: netfilter@xxxxxxxxxxxxxxxxxxx
Cc: Fajar Priyanto
Subject: Re: I thought ssh is port #22 ?!!

You should edit sshd_config with the port command and set it to 22.  If the
directive is not present, I've had some versions of ssh listen on
everything, others only 22.  

You may also want to use the PermitRootLogin no directive to disable root
logins and use a regular user account to log in and then su to root if need
be.

As far as the firewall, you may want to setup your firewall to drop all
packets except packets sent to needed services.

Hope that helps
Chris
> -----Original Message-----
> From: Fajar Priyanto [mailto:fajarpri@xxxxxxxxxx]
> Sent: Thursday, April 1, 2004 01:32 AM
> To: netfilter@xxxxxxxxxxxxxxxxxxx
> Subject: I thought ssh is port #22 ?!!
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi guys,
> I'm not really sure about this. I thought ssh is made in port #22?
> When I made a ssh session into my server, /var/log/messages showed this:
> Apr  1 09:20:20 server2 sshd[2711]: Accepted password for root from 
> 192.168.0.234 port 32873 ssh2
> 
> Why did it use port #32873?
> Is there something wrong with my ssh or firewall?
> TIA,
> - -- 
> Fajar Priyanto | Reg'd Linux User #327841 | http://linux.arinet.org
> 08:31:42 up 36 min, Mandrake Linux release 9.2 (FiveStar) for i586 
> public key: https://www.arinet.org/fajar-pub.key
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> 
> 



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