Hello Please fithting with the freeradius server, yes installed also Mysql and I have the problem that the Error binding to port for 0.0.0.0 appair. No other service are running on this port 1812, yes I’am shure. Today installed a new version bullseye on one other machine. And I have the same issue….. Yes kill -9 PID always done, without any change ->Ps -ax | grep freeradius, appair only if this are active ->Port are always only one time listening Failed binding to auth interface enp3s0 address * port 1812 bound to server default: Address already in use /etc/freeradius/3.0/sites-enabled/default[59]: Error binding to port for 0.0.0.0 port 1812 In this folder > /etc/freeradius/3.0/sites-enabled/default file installed, for now and also remarked IPv6 Listen, no success. Linux HPT610.caloro.m 5.10.0-11-amd64 #1 SMP Debian 5.10.92-1 (2022-01-18) x86_64 GNU/Linux root@name:/etc/default# dpkg -l | grep freeradius ii freeradius 3.0.21+dfsg-2.2+deb11u1 ii freeradius-common 3.0.21+dfsg-2.2+deb11u1 ii freeradius-config 3.0.21+dfsg-2.2+deb11u1 ii freeradius-mysql 3.0.21+dfsg-2.2+deb11u1 ii freeradius-utils 3.0.21+dfsg-2.2+deb11u1 ii libfreeradius3 3.0.21+dfsg-2.2+deb11u1 thanks for any possible help Mauri |