Recently I`ve configured freeradius with mikrotik to connect users via pppoe, pptp or l2tp. The problem is that, when one user is connected, the other user is unable to connect. Here are the logs. --------------------------------------First user connects ------------------------- (46 messages discarded) Echo: radius,debug,packet Calling-Station-Id = "00:50:8D:68:DB:20" Echo: radius,debug,packet Called-Station-Id = "service1" Echo: radius,debug,packet NAS-Port-Id = "bridge1" Echo: radius,debug,packet Acct-Session-Id = "81000000" Echo: radius,debug,packet Framed-IP-Address = 10.194.244.149 Echo: radius,debug,packet Acct-Authentic = 1 Echo: radius,debug,packet Acct-Status-Type = 1 Echo: radius,debug,packet NAS-Identifier = "MikroTik" Echo: radius,debug,packet NAS-IP-Address = 10.194.23.248 Echo: radius,debug,packet Acct-Delay-Time = 0 Echo: radius,debug,packet received Accounting-Response with id 124 from 10.194.2 3.246:1813 Echo: radius,debug,packet Signature = 0x16c0ffe781452ce6261046058ecf4f61 [admin@MikroTik] > Echo: radius,debug received reply for 53:00 Echo: radius,debug request 53:00 processed [admin@MikroTik] > (8 messages discarded) ---------------------------------- Second user is trying to connect -------------- Echo: radius,debug,packet User-Name = "toxie" Echo: radius,debug,packet Calling-Station-Id = "00:C0:26:6D:16:09" Echo: radius,debug,packet Called-Station-Id = "service1" Echo: radius,debug,packet NAS-Port-Id = "bridge1" Echo: radius,debug,packet MS-CHAP-Challenge = 0xc87049d986b943c7773272b9f6c0 76dd Echo: radius,debug,packet MS-CHAP2-Response = 0x0100820169c2908c12b7cfbe01f2 55ef Echo: radius,debug,packet c1c200000000000000004320c48df468 Echo: radius,debug,packet 8a58f84d8d4727c73ee24d4a4e886258 Echo: radius,debug,packet e85c Echo: radius,debug,packet NAS-Identifier = "MikroTik" Echo: radius,debug,packet NAS-IP-Address = 10.194.23.246 Echo: radius,debug could not receive packet for 53:04: Connection refused [admin@MikroTik] > (7 messages discarded) Echo: radius,debug,packet User-Name = "toxie" Echo: radius,debug,packet Calling-Station-Id = "00:C0:26:6D:16:09" Echo: radius,debug,packet Called-Station-Id = "service1" Echo: radius,debug,packet NAS-Port-Id = "bridge1" Echo: radius,debug,packet MS-CHAP-Challenge = 0xc87049d986b943c7773272b9f6c0 76dd Echo: radius,debug,packet MS-CHAP2-Response = 0x0100820169c2908c12b7cfbe01f2 55ef Echo: radius,debug,packet c1c200000000000000004320c48df468 Echo: radius,debug,packet 8a58f84d8d4727c73ee24d4a4e886258 Echo: radius,debug,packet e85c Echo: radius,debug,packet NAS-Identifier = "MikroTik" Echo: radius,debug,packet NAS-IP-Address = 10.194.23.246 Echo: radius,debug could not receive packet for 53:04: Connection refused [admin@MikroTik] > (7 messages discarded) Echo: radius,debug,packet User-Name = "toxie" Echo: radius,debug,packet Calling-Station-Id = "00:C0:26:6D:16:09" Echo: radius,debug,packet Called-Station-Id = "service1" Echo: radius,debug,packet NAS-Port-Id = "bridge1" Echo: radius,debug,packet MS-CHAP-Challenge = 0xc87049d986b943c7773272b9f6c0 76dd Echo: radius,debug,packet MS-CHAP2-Response = 0x0100820169c2908c12b7cfbe01f2 55ef Echo: radius,debug,packet c1c200000000000000004320c48df468 Echo: radius,debug,packet 8a58f84d8d4727c73ee24d4a4e886258 Echo: radius,debug,packet e85c Echo: radius,debug,packet NAS-Identifier = "MikroTik" Echo: radius,debug,packet NAS-IP-Address = 10.194.23.246 Echo: radius,debug could not receive packet for 53:04: Connection refused [admin@MikroTik] > Echo: radius,debug timeout for 53:04 [admin@MikroTik] > ------------------------------------------------------------------------------------ The usernames and the passwords are ok. When I tried to connect one user to one MT and the second user to another mikrotik everything works fine.But when I`m using only 1 MT, only one user can be logged in. Does anybody had some issues like this before ? It`s really annoying me, cause I can`t figure it out where could be the problem. I noticed that when nobody is connected to radius, radius server can ping mikrotik and mikrotik can ping radius too.When somebody connects to radius, radius can`t ping mikrotik anymore, neither the user, but mikrotik can ping the radius server and the user too without no problem.