[syslog-ng]Does syslog-ng support remote logging?

I’ve had syslog-ng on a Linux 7.1 box for a couple months and it’s been running great. I’m attempting to setup remote logging on the various Cisco routers on my network and have them point to syslog-ng. I think the Cisco configurations are set up correctly since I have a sniffer on the network and I can see the packets going to the Linux box, but nothing shows up in syslog-ng that I can see. What should I be using in the syslog-ng configuration to isolate the relevant data? I’ve unsuccessfully tried several.