Re: Unable To Bind To Port 6400

[email protected] wrote:

>
> "Unable to bind to port: Port=6400 errno=98 "Address already in use"
> "SMTP Server Listener Failure - The requested TCP/IP Port is already 
> in use on this system."
>
> I always thought that SMTP listens on Port 25 if not told to do 
> otherwise.
> When viewing the tasks of the domino server it tells me "SMTP: 
> Listening on port 25".
> So what is this Port 6400 all about ? I couldn't really find anything 
> about this by googling, except for some Trojan called "TheThing" which 
> I can rule out as the new server is running isolated in a testing 
> environment as yet.
>
>
You have something listening on port 25. The error message is 
misleading.  Port 6400 is hex  0x0019 and when you byte swap it it 
becomes 0x1900, hence decimal 6400. Credits to 
http://www-10.lotus.com/ldd/profile.nsf/publicprofile?openform&person=Ross%20Alexander 
for this one.

So your real problem is that you probably have some other SMTP daemon 
running. As suggested, try netstat or type in

fuser 25/tcp

which will give you the process ID of the listening services and we will 
take it from there.

Regards,

Sascha Siekmann

http://spam-exitus.de