The Roaming solution for the public sector https://wiki.govroam.uk/ 2026-09-05T10:59:01+00:00 https://wiki.govroam.uk/ https://wiki.govroam.uk/lib/exe/fetch.php?media=wiki:logo.png text/html 2026-08-12T16:14:37+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:fixing_zombie_issues&rev=1786551277&do=diff Fixing Zombie Issues The text we send explaining the nature of a 'Zombie' is below. There are several reasons why zombies might happen. 1. Requests are being dropped between Jisc and your RADIUS server. Firewalls might be configured to block RADIUS traffic on port 1812 (unlikely) or might be configured to drop fragmented packets (more likely). RADIUS packets can be fragmented when they exceed the MTU size. This can happen when EAP-TLS contains too many/too big certificates. Even if you're not… text/html 2026-08-12T16:12:55+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:checking_fortiauthentictor_logs_for_zombies&rev=1786551175&do=diff In the logs look for something like these: radius: [urx] Timeout waiting for response from RADIUS server <Server_Name> (10.x.x.x) facauth: Warning: Remote RADIUS server <Server_Name> not responding, marking down/zombie. text/html 2026-08-12T16:10:57+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:checking_ise_logs_for_zombies&rev=1786551057&do=diff In Operations > RADIUS > Live Logs: 11353 No more external RADIUS servers; can't perform failover text/html 2026-08-12T16:04:46+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:checking_clearpass_logs_for_zombies&rev=1786550686&do=diff When looking under Monitoring > Event Viewer in ClearPass Policy Manager, a typical system log entry appears as: Timestamp: 2026-08-12 17:10:25,482 Log Level: WARN Category: Server Source: RADIUS-Proxy Event ID: 3002 Description: External RADIUS server did not respond to 5 consecutive requests. Server marked as down. Further requests will be dropped/proxied elsewhere for 300 seconds. text/html 2026-08-12T16:02:19+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:checking_nps_logs_for_zombies&rev=1786550539&do=diff The server logs an Event ID of 38 and an entry such as: The remote RADIUS server ([0-9a-f\.\:]+) has not responded to \d+ consecutive requests. The server has been marked as unavailable. text/html 2026-08-12T16:00:09+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:checking_radiator_logs_for_zombies&rev=1786550409&do=diff Check the logs for a regex such as: INFO: Marked host ([0-9a-f\.\:]+) as dead (dead-realm / no reply) text/html 2026-08-12T15:58:21+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:checking_radsecproxy_logs_for_zombies&rev=1786550301&do=diff Look in the logs for a regex such as: Marking home server ([0-9a-f\.\:]+) port \d+ as zombie text/html 2026-08-12T15:57:01+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:checking_freeradius_logs_for_zombies&rev=1786550221&do=diff Look in the logs for a regex such as: Marking home server ([0-9a-f\.\:]+) port \d+ as zombie text/html 2026-08-12T15:39:46+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?id=siteadmin:configuration_fragments&rev=1786549186&do=diff Configuration Fragments If you have any configuration suggestions please feel free to add to the list: RADSECproxy FreeRADIUS RADIATOR MS NPS Aruba Clearpass Cisco ISE ---------- Realm Filtering Called Station ID Operator Name Attribute Filtering Fixing Zombie Issues text/html 2026-01-16T16:26:00+00:00 andylogan (andylogan@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Awebex_collaborate_network_requirements_v1.5_1.pdf&ns=siteadmin&rev=1768580760&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/images/fileicons/svg/pdf.svg" alt="webex_collaborate_network_requirements_v1.5_1.pdf" loading="lazy" width="500" height="500" /> text/html 2025-11-20T13:58:49+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Ascreenshot_of_called_station_attribute_options.png&ns=siteadmin&rev=1763647129&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=b05059&amp;media=siteadmin:screenshot_of_called_station_attribute_options.png" alt="screenshot_of_called_station_attribute_options.png" loading="lazy" width="500" height="500" /> text/html 2025-11-20T13:22:51+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Aarubawirelesscalledstationid.png&ns=siteadmin&rev=1763644971&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=b500a7&amp;media=siteadmin:arubawirelesscalledstationid.png" alt="arubawirelesscalledstationid.png" loading="lazy" width="500" height="500" /> text/html 2025-11-20T13:16:33+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=public%3Aarubawirelesscalledstationid.jpg&ns=public&rev=1763644593&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=54f242&amp;media=public:arubawirelesscalledstationid.jpg" alt="arubawirelesscalledstationid.jpg" loading="lazy" width="500" height="500" /> text/html 2025-11-20T13:07:05+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=public%3A727a15973d164da386103295413dc08c.jpg&ns=public&rev=1763644025&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=4e1a02&amp;media=public:727a15973d164da386103295413dc08c.jpg" alt="727a15973d164da386103295413dc08c.jpg" loading="lazy" width="500" height="500" /> text/html 2025-11-20T12:57:31+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=public%3A74db7d9aa24f46bba4573acda420a877.png&ns=public&rev=1763643451&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=609798&amp;media=public:74db7d9aa24f46bba4573acda420a877.png" alt="74db7d9aa24f46bba4573acda420a877.png" loading="lazy" width="500" height="500" /> text/html 2025-11-20T12:54:46+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Apasted%3A20251120-125446.png&ns=siteadmin%3Apasted&rev=1763643286&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=ce3d02&amp;media=siteadmin:pasted:20251120-125446.png" alt="20251120-125446.png" loading="lazy" width="500" height="500" /> text/html 2024-05-15T13:22:29+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Ascreenshot_2024-05-15_at_14.16.20.png&ns=siteadmin&rev=1715779349&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=93ed63&amp;media=siteadmin:screenshot_2024-05-15_at_14.16.20.png" alt="screenshot_2024-05-15_at_14.16.20.png" loading="lazy" width="500" height="500" /> text/html 2024-05-15T13:20:03+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Ascreenshot_2024-05-15_at_14.14.49.png&ns=siteadmin&rev=1715779203&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=37f4df&amp;media=siteadmin:screenshot_2024-05-15_at_14.14.49.png" alt="screenshot_2024-05-15_at_14.14.49.png" loading="lazy" width="500" height="500" /> text/html 2024-05-15T13:18:28+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Ascreenshot_2024-05-15_at_14.13.46.png&ns=siteadmin&rev=1715779108&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=38f119&amp;media=siteadmin:screenshot_2024-05-15_at_14.13.46.png" alt="screenshot_2024-05-15_at_14.13.46.png" loading="lazy" width="500" height="500" /> text/html 2024-05-15T13:07:17+00:00 admin (admin@undisclosed.example.com) https://wiki.govroam.uk/doku.php?image=siteadmin%3Ascreenshot_2024-05-15_at_14.03.15.png&ns=siteadmin&rev=1715778437&tab_details=history&media_do=diff&do=media <img src="https://wiki.govroam.uk/lib/exe/fetch.php?w=500&amp;h=500&amp;tok=f5e59d&amp;media=siteadmin:screenshot_2024-05-15_at_14.03.15.png" alt="screenshot_2024-05-15_at_14.03.15.png" loading="lazy" width="500" height="500" />