On Feb 27, 2018, at 4:49 AM, Joachim Winkler <joachim.winkler at fmed48.zsbulm.de> wrote: > is it possible to send COA-Reqeust from a specific source Port ? When using "originate-coa" functionality, sure. See the "src_ipaddr" configuration in raddb/proxy.conf. For radclient, no. Alan DeKok.