Hi List I've got radrelay replicating accounting packets from a primary radius server to a secondary radius server. The secondary radius server is capable of handling radius accounting/auth requests if NASes cannot reach the primary or the primary fails. I want to replicate packets from the secondary to the primary server in addition to replicating from primary to secondary, and so I tried setting up radrelay on the secondary identically to the one on the primary. The idea is to use radrelay as a simple mechanism to ensure that both servers have a copy of all the accounting packets. However, when I test sending accounting packets to the secondary, the two systems go into some kind of circular loop, neither being smart enough to recognise a replicated auth packet when it sees one :-) When I look at the incoming packet dumps I see accounting requests being replicated and responded to with ever-increasing numbers of Proxy-State attributes, until the radrelay instance crashes with a thread related error: --- Sending Accounting-Request of id 76 to 10.1.1.112 port 1646 User-Name = "morpork@ankh.morpork.org" Service-Type = Framed-User NAS-IP-Address = 196.7.321.6 NAS-Identifier = "196.7.321.6" NAS-Port = 1234 NAS-Port-Type = Async Acct-Session-Id = "00001234" Acct-Status-Type = Stop Called-Station-Id = "123456789" Calling-Station-Id = "987654321" Acct-Delay-Time = 5108 Acct-Session-Time = 1000 Acct-Input-Octets = 20000 Acct-Output-Octets = 30000 Proxy-State = 0x3231353235 Proxy-State = 0x3236333439 Proxy-State = 0x3135343437 Proxy-State = 0x3136313331 Proxy-State = 0x35383236 Proxy-State = 0x3435313436 Proxy-State = 0x3532303932 Proxy-State = 0x3137323331 Proxy-State = 0x39323331 Proxy-State = 0x3239343737 Proxy-State = 0x3435383237 Proxy-State = 0x3138313734 Proxy-State = 0x3239343138 Proxy-State = 0x373430 Proxy-State = 0x393131 . . --- My question is, how would i configure two-way replication in a scenario like this, without the loops ? Informational: Server 1/Primary : FreeRADIUS Version 2.1.10, for host i686-pc-linux-gnu, (Debian squeeze/sid) Server 2/Secondary : FreeRADIUS Version 2.1.7, for host i686-redhat-linux-gnu (CentOS 5.5) (both systems on the same physical network and subnet) Thanks in advance, Arch