Fail to restart radiusd

[Alan DeKok]

Yang Xue wrote:
> Hi,
> 
> We're running freeradius server v2.0.3 and restart of the daemon failed with:
> 
> #/etc/init.d/radiusd restart
> Stopping RADIUS server: [FAILED]
> Starting RADIUS server: Fri Jul 16 07:50:16 2010 : Info: Starting -
> reading configuration files ... [FAILED]

  If it didn't stop the server, it won't be able to start a new one.

> In the radius.log, it shows:
> 
> Error: There appears to be another RADIUS server running on the
> authentication port 1812 <---
> 
> The odd thing is that there is no radiusd process running on the Linux
> server at all:
> 
> # ps aux  | grep rad
> root      4869  0.0  0.0  4544  636 pts/1    S+   12:11   0:00 grep rad

  <shrug>  It might have a different name.  See also:

$ netstat -an | grep 1812

> Does anybody know why it complains about "another RADIUS server
> running on the authentication port 1812" although there is no existing
> radiusd process at all?

  The server tries to use port 1812, and the OS says it can't, because
there's another process using it.

  Find that process, and stop it.

  Alan DeKok.