Hi Alan, Just to make sure i've got the right idea about v2 realms. Here is an example config for the Janet Roaming Service, which allows users at any academic institution in the UK to authenticate at any other . The version 1 realm JRS realm jrs { type = RADIUS authhost = roaming1.ja.net:1812 accthost = roaming2.ja.net:1813 secret = theirsecret nostrip ldflag = round_robin } realm jrs { type = RADIUS authhost = roaming2.ja.net:1812 accthost = roaming2.ja.net:1813 secret = theirsecret nostrip ldflag = round_robin } The version 2 realm JRS ############## # Server Pools # realm jrs { auth_pool = jrs_auth_balance acct_pool = jrs_acct_balance nostrip } ############## # Server Pools # server_pool jrs_auth_balance { home_server = jrs1_auth home_server = jrs2_auth type = load-balance } server_pool jrs_acct_balance { home_server = jrs1_auth home_server = jrs2_auth type = load-balance } ############## # Home Servers home_server jrs1_auth { type = auth hostname = roaming1.ja.net port = 1812 secret = theirsecret response_window = 20 zombie_period = 40 revive_interval = 120 ping_check = request ping_interval = 30 num_pings_to_alive = 3 } home_server jrs1_acct { type = acct hostname = roaming1.ja.net port = 1813 secret = theirsecret response_window = 20 zombie_period = 40 revive_interval = 120 ping_check = request ping_interval = 30 num_pings_to_alive = 3 } home_server jrs2_auth { type = auth hostname = roaming2.ja.net port = 1812 secret = theirsecret response_window = 20 zombie_period = 40 revive_interval = 120 ping_check = request ping_interval = 30 num_pings_to_alive = 3 } home_server jrs2_acct { type = acct hostname = roaming1.ja.net port = 1813 secret = theirsecret response_window = 20 zombie_period = 40 revive_interval = 120 ping_check = request ping_interval = 30 num_pings_to_alive = 3 } Very long, but I can see the advantages :) Thanks, Arran