Govroam

fixing_zombie_issues

admin (admin@undisclosed.example.com) — 2026-08-12T16:14:37+00:00

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…

checking_fortiauthentictor_logs_for_zombies - created

admin (admin@undisclosed.example.com) — 2026-08-12T16:12:55+00:00

In the logs look for something like these: radius: [urx] Timeout waiting for response from RADIUS server (10.x.x.x) facauth: Warning: Remote RADIUS server not responding, marking down/zombie.

checking_ise_logs_for_zombies - created

admin (admin@undisclosed.example.com) — 2026-08-12T16:10:57+00:00

In Operations > RADIUS > Live Logs: 11353 No more external RADIUS servers; can't perform failover

checking_clearpass_logs_for_zombies

admin (admin@undisclosed.example.com) — 2026-08-12T16:04:46+00:00

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.

checking_nps_logs_for_zombies - created

admin (admin@undisclosed.example.com) — 2026-08-12T16:02:19+00:00

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.

checking_radiator_logs_for_zombies

admin (admin@undisclosed.example.com) — 2026-08-12T16:00:09+00:00

Check the logs for a regex such as: INFO: Marked host ([0-9a-f\.\:]+) as dead (dead-realm / no reply)

checking_radsecproxy_logs_for_zombies - created

admin (admin@undisclosed.example.com) — 2026-08-12T15:58:21+00:00

Look in the logs for a regex such as: Marking home server ([0-9a-f\.\:]+) port \d+ as zombie

checking_freeradius_logs_for_zombies

admin (admin@undisclosed.example.com) — 2026-08-12T15:57:01+00:00

Look in the logs for a regex such as: Marking home server ([0-9a-f\.\:]+) port \d+ as zombie

configuration_fragments

admin (admin@undisclosed.example.com) — 2026-08-12T15:39:46+00:00

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

clearpass_-_setting_o-n

admin (admin@undisclosed.example.com) — 2026-08-11T13:32:09+00:00

Setting Operator-Name in Clearpass The Operator-Name attribute is used to identify the Visited Site to the Home Site. i.e. when a user joins at a Visited Site the name of the site is passed through in a RADIUS Request to the Home Site. The Home Site might use this information to generate statistics on where its users are visiting or to report problems with the Visited Site.

webex_collaborate_network_requirements_v1.5_1.pdf - created

andylogan (andylogan@undisclosed.example.com) — 2026-01-16T16:26:00+00:00

screenshot_of_called_station_attribute_options.png - created

admin (admin@undisclosed.example.com) — 2025-11-20T13:58:49+00:00

arubawirelesscalledstationid.png - created

admin (admin@undisclosed.example.com) — 2025-11-20T13:22:51+00:00

arubawirelesscalledstationid.jpg - created

admin (admin@undisclosed.example.com) — 2025-11-20T13:16:33+00:00

727a15973d164da386103295413dc08c.jpg - created

admin (admin@undisclosed.example.com) — 2025-11-20T13:07:05+00:00

74db7d9aa24f46bba4573acda420a877.png - created

admin (admin@undisclosed.example.com) — 2025-11-20T12:57:31+00:00

20251120-125446.png - created

admin (admin@undisclosed.example.com) — 2025-11-20T12:54:46+00:00

screenshot_2024-05-15_at_14.16.20.png - created

admin (admin@undisclosed.example.com) — 2024-05-15T13:22:29+00:00

screenshot_2024-05-15_at_14.14.49.png - created

admin (admin@undisclosed.example.com) — 2024-05-15T13:20:03+00:00

screenshot_2024-05-15_at_14.13.46.png - created

admin (admin@undisclosed.example.com) — 2024-05-15T13:18:28+00:00