Network Verification; Check The Port Number; Ping The Domain Name (For Ad Server) - ZyXEL Communications NXC5500 Troubleshooting Manual

Network Verification

To confirm the network traffic, please make sure the port of server is same as that configured in
the NXC5500 and login the console of NXC and ping the domain name and server.

Check the port number

The default port of Radius server in the NXC is 1812 and the default port of LDAP and AD server
in the NXC is 389. If you have the firewall in network, please check those ports also are opened
in the firewall.

Ping the domain name (for AD server)

If you use the AD server to authenticated clients, the NXC have ability to resolve the domain
name.
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