This should be representative of the configuration used in production. It contains the appropriate logging and filtering.

# Some basic logging
LogLevel 3                                                                                
                                                                                          
LogDestination         x-syslog:///LOG_DAEMON                                             

# Prevents RADIUS servers from causing a loop by sending requests back again.
LoopPrevention         On                                                                 
            
# FTICKS is a standardised way of logging authentication attempts.                                                                                                       
FTicksSyslogFacility LOG_LOCAL0                                                           
FTicksReporting Full                                                                      
FTicksMAC VendorKeyHashed                                                                 
FTicksKey arandomsalt                                                                     

rewrite OutboundFilter {
    # Operator-Name
    RemoveAttribute 126
    AddAttribute 126:'1home.site

    WhitelistMode on
    # User-Name
    WhitelistAttribute 1
    # EAP-Message
    WhitelistAttribute 79
    # Message-Authenticator
    WhitelistAttribute 80
    # State
    WhitelistAttribute 24
    # Proxy-State
    WhitelistAttribute 33
    # Operator-Name
    WhitelistAttribute 126
    # Class
    WhitelistAttribute 25
    # Calling-Station-Id
    WhitelistAttribute 31
    # Called-Station-Id
    WhitelistAttribute 30
    # Chargeable-User-Identity
    WhitelistAttribute 89
}


# Upstream RADIUS proxy                                                                                
server  roaming0.govroam.uk {                                                                           
        host 212.219.190.139                                                                  
        type udp                                                                          
        secret XXXX                                                             
        RewriteOut OutboundFilter
        statusServer minimal   #This checks that status of the adjacent servers.                                                                   
}                                                                                         

# Upstream RADIUS proxy (Omit for Visited Only)                                                                                 
server  roaming1.govroam.uk {                                                                           
        host 212.219.209.43                                                                  
        type udp                                                                          
        secret XXXX                                                             
        RewriteOut OutboundFilter
        statusServer minimal   #This checks that status of the adjacent servers.                                                                   
}                                                                                         

# Upstream RADIUS proxy (Omit for Visited Only)                                                                                 
server  roaming2.govroam.uk {                                                                           
        host 212.219.247.59                                                                  
        type udp                                                                          
        secret XXXX                                                             
        RewriteOut OutboundFilter
        statusServer minimal   #This checks that status of the adjacent servers.                                                                   
}                                                                                         

# Upstream RADIUS proxy (Omit for Visited Only)                                                                                 
server  roaming3.govroam.uk {                                                                           
        host 195.194.21.203                                                                  
        type udp                                                                          
        secret XXXX                                                             
        RewriteOut OutboundFilter
        statusServer minimal   #This checks that status of the adjacent servers.                                                                   
}                                                                                         


# Local IdP which will do the authentication (Omit for Visited Only)                                                                                       
server  localidp1 {                                                                       
        host 10.10.10.21                                                                  
        type udp                                                                          
        secret XXXX                                                             
        statusServer auto
}                                                                                         


# RADIUS requests will also be received from the national proxies. (Omit for Visited Only)                                                                                       
client  roaming0.govroam.uk {                                                                           
        host 212.219.190.139                                                                  
        type udp                                                                          
        secret XXXX                                                             
}                                                                                         
                                                                                          
client  roaming1.govroam.uk {                                                                           
        host 212.219.209.43                                                                  
        type udp                                                                          
        secret XXXX                                                             
}                                                                                         
                                                                                          
client  roaming2.govroam.uk {                                                                           
        host 212.219.247.59                                                                  
        type udp                                                                          
        secret XXXX                                                             
}                                                                                         
                                                                                          
client  roaming3.govroam.uk {                                                                           
        host 195.194.21.203                                                                  
        type udp                                                                          
        secret XXXX                                                             
}                                                                                         

# Wireless system                                                                                           
client  nas {                                                                             
        host 10.10.10.10                                                                  
        type udp                                                                          
        secret XXXX                                                             
        fticksVISCOUNTRY GB                                                               
        fticksVISINST 1home.site        # Adding information to the logs about this client.                                                   
}                                                                                         

#Known local realm (Omit for Visited Only)                                                                                         
realm localnet {                                                                          
        server localidp1                                                                  
}                                                                                         

### Catch a load of common misconfigurations
realm /^$/ {
    replymessage "Misconfigured client: empty realm!"
}

realm /@((myabc|gmail|googlemail|hotmail|live|outlook|yahoo|unimail).com|(.*\.)?3gppnetworks?.org|yahoo.cn) {
    replymessage "Misconfigured client: govroam realm not permitted"
}

realm /@(.*\.(ax\.uk|ax\.edu|sc\.uk|ac\.edu|ac\.u|local)|ac\.uk)$ {
    replymessage "Misconfigured client: govroam realm invalid (typo?)"
}

realm /@\. {
    replymessage "Misconfigured client: govroam realm invalid (leading '.')"
}

realm /@[^\.]+$ {
    replymessage "Misconfigured client: govroam realm invalid (incomplete)"
}

### Check it's a syntactically correct realm and proxy if ok
realm /@[0-9a-zA-Z\.]+\.[0-9a-zA-Z\.]+$ {
    server roaming0.govroam.uk
    server roaming1.govroam.uk
    server roaming2.govroam.uk
    server roaming3.govroam.uk
}

### Otherwise reject it
realm * {
    replymessage "Misconfigured client: govroam realm invalid (syntax error)"
}