Причину нашел, оказывается нужно все параметры каждому юзеру прописывать, хотя есть запись DEFAULT, наверное, я ее не правильно использовал.
Теперь другая проблемма: portslave пишет
Apr 24 17:12:36 unix pppd[7163]: rcvd [PAP AuthReq id=0xc user="UseR" password="pass"]
Apr 24 17:12:39 unix pppd[7163]: radius@192.168.0.1:1813 not responding
Apr 24 17:12:48 unix last message repeated 6 times
Apr 24 17:12:51 unix pppd[7163]: Radius servers 192.168.0.1 and 192.168.0.1 not responding
Apr 24 17:12:51 unix pppd[7163]: user UseR logged in
Apr 24 17:12:51 unix pppd[7163]: sent [PAP AuthAck id=0xc "Login ok"]
И после отключения юзера:
Apr 24 17:13:47 unix pppd[7163]: Script /etc/ppp/ip-down started (pid 7176)
Apr 24 17:13:47 unix pppd[7163]: sent [LCP TermReq id=0x5 "User request"]
Apr 24 17:13:47 unix pppd[7163]: rcvd [LCP TermAck id=0x5 "User request"]
Apr 24 17:13:50 unix pppd[7163]: radius@212.19.139.194:1813 not responding
Apr 24 17:13:50 unix pppd[7163]: radius@192.168.0.1:1813 not responding
Apr 24 17:13:52 unix pppd[7163]: Hangup (SIGHUP)
Apr 24 17:13:52 unix pppd[7163]: radius@192.168.0.1:1813 not responding
Apr 24 17:13:58 unix last message repeated 4 times
Apr 24 17:13:58 unix pppd[7163]: Radius servers 192.168.0.1 and 192.168.0.1 not responding
Apr 24 17:13:58 unix pppd[7163]: Connection terminated.
Apr 24 17:13:58 unix pppd[7163]: Script /etc/ppp/ip-down finished (pid 7176), status = 0x0
Apr 24 17:13:58 unix pppd[7163]: Connect time 1.3 minutes.
Apr 24 17:13:58 unix pppd[7163]: Sent 3147 bytes, received 7058 bytes.
Apr 24 17:13:58 unix pppd[7163]: tcflush failed: Input/output error
Apr 24 17:13:58 unix pppd[7163]: Exit.
А RADIUS по идее на 1812 порту сидит.