Hi Alan, thanks for your reply.
You need to send an empty Accounting-Response packet. And *also* a CoA-Request packet to the NAS. See sites-available/originate-coa for details.
The CoA-Request packet will need to contain attributes that identify the user session. Typically this is User-Name, NAS-Identifier, NAS-Port, etc. The exact list is found either in the NAS documentation, or by trial & error via testing.
> Typically you can just copy the relevant attributes from the Accounting-Request packet into the CoA-Request packet. I have changed Reply updates to CoA updates as you suggested, like switch "%{&control:Subscriber-NAS-Vendor}" { case "Mikrotik" { update coa { &User-Name = "%{User-Name}" # upload and download strings are equal for Mikrotik (Uk/Dk) &Mikrotik-Rate-Limit := "%{sql:SELECT GetRate('%{User-Name}', 'download')}" } } case "Cisco" { update coa { &User-Name = "%{User-Name}" &Cisco-Avpair := "%{sql:SELECT GetRate('%{User-Name}', 'download')}" &Cisco-Avpair += "%{sql:SELECT GetRate('%{User-Name}', 'upload')}" } } } debug output finishes as follows: (338) [attr_filter.accounting_response] = updated (338) } # accounting = updated (338) Sent CoA-Request Id 248 from 0.0.0.0:51176 to {nas.IP}:3799 length 65 (338) User-Name = "testUser" (338) NAS-IP-Address = {nas.IP} (338) Mikrotik-Rate-Limit := "802k/12288k" (338) Sent Accounting-Response Id 69 from {RadiusServer.IP}:1813 to {nas.IP}.15:36823 length 0 (338) Finished request so not getting a CoA-ACK result because of some problem(s) in my coa configuration, but the same command work by radclient $"echo \"User-Name={radcheck.username}\nMikrotik-Rate-Limit:={radcheck.upload_rate}k/{radcheck.download_rate}k/\" | radclient {nas.IP}:{nas.RadiusIncomingPort} CoA {nas.Secret}" with result: Sent CoA-Request Id 46 from 0.0.0.0:43039 to {nas.IP}:3799 length 62 Received CoA-ACK Id 46 from {nas.IP}:3799 to 0.0.0.0:0 length 34 In home_server example-coa in originate-coa file it says "Change this IP address to the IP address of the NAS." and i changed IP to the IP address of a NAS (if i can make it work i will add more NASes) and chaged its original name example-coa to NAS name mikrotik1 and renamed example-coa in home_server_pool coa to the new name mikrotik1. There is somoething wrong or missing in my coa configuration. Any help much appreciated. Thanks - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html