[Using freeradius 2.1.12+dfsg-1.2ubuntu8 from ubuntu 14.04] I notice that freeradius listens on UDP port 1814. The problem is that this conflicts with another application I'm using: http://docs.ganeti.org/ganeti/master/man/ganeti-confd.html and I'd rather move freeradius than this one. However I cannot see how to change which port freeradius uses. There is no entry for 1814 in /etc/services. I see the following in freeradius -X output: Listening on proxy address * port 1814 but a grep -R of /etc/freeradius doesn't find 1814. Indeed, a grep -R of the entire source code doesn't find anything relevant for 1814. So my questions are: * why is FreeRADIUS using port 1814? Has it bound a socket to port 1814 for sending *outbound* proxy requests (and is only "Listening" in the sense that it receives replies to the requests it has sent?) * how can I bind this to a different port instead? In ./src/include/radius.h I can see #define PW_AUTH_UDP_PORT 1812 #define PW_ACCT_UDP_PORT 1813 but I'm stuck finding where 1814 is chosen. Ah, maybe it's this: port = sock->port + 2; /* skip acct port */ ... /* * Try to find a proxy port (value doesn't matter) */ for (sock->port = port; sock->port < 64000; sock->port++) { if (listen_bind(this) == 0) { *last = this; last = &(this->next); /* just in case */ break; } } which suggests that it's hard-coded to be the authentication port + 2, or the first available socket after that. OK, to test this theory: stop both apps, restart the other app which binds to 1814, then restart freeradius. # netstat -naup | grep freeradius udp 0 0 0.0.0.0:42388 0.0.0.0:* 23378/freeradius udp 0 0 127.0.0.1:18120 0.0.0.0:* 23378/freeradius udp 0 0 0.0.0.0:1812 0.0.0.0:* 23378/freeradius udp 0 0 0.0.0.0:1813 0.0.0.0:* 23378/freeradius udp 0 0 0.0.0.0:1815 0.0.0.0:* 23378/freeradius Yep, freeradius has moved to 1815. So I can make this work, but only if ganeti-confd starts *before* freeradius. Is there any setting I've missed which would allow the freeradius port scan to start at a different place? Thanks, Brian.