[>Thanks for the response. My original email was very lengthy, but at the bottom you can see a wireshark capture showing the packet arrival. (My understanding is wireshark is a pretty GUI based on tcpdump)

Yes, it arrived but can't get through the firewall. You say you are using default freeradius configuration, so you haven't done anything strange to listen section to cause this - it has to be tha firewall.] OK, I'll investigate the firewall this morning - I am new to openSUSE so I don't know where that is but hopefully google will point me in the right direction. FYI - I uninstalled both installations, removed all the files under /etc/raddb and reinstalled only editing "users and clients.conf" What I found is on the 10.10.10.11 machine which has a full 32 bit version of openSUSE 11.1 installed that radiusd did not respond from other host. It did respond to radtest from another terminal window on the same machine I then started Linux using a openSUSE 64 bit "live CD" on my 10.10.10.10 machine (because its hard drive has windows). In installed the basic packages needed to get freeradius running (C/C++ dev, gnu make etc) - I used an identical "users and client.conf file" with 24 bit mask for clients in 10.10.10.0 On the liveCD host the freeradius server works! - so perhaps it is a lack of firewall? Note: I alsotraied changing the NAS-ID as suggested in another thread - that did not seem to make any difference 10.10.10.11 did not work with either NAS ID while 10.10.10.10 worked with either Thanks for the tips - I will cross my fingers it is a firewall setting that is installed by default in openSUSE 11.1