Here you're able to configure network aspects of the port.
If enabled, dumps extra debug information to be dumped to syslog.
Authentication type.
Example: such as radius.
Primary authentication host to be used.
Secondary authentication host to be used when primary authentication host is unreachable or down.
This definition is optional.
Primary accounting host to be used.
Usually this is the same host as the authentication host.
Secondary accounting host to be used when primary accounting host is unreachable or down.
Usually this is the same as the secondary authentication host.
This definition is optional.
Retry timeout for authentication and accounting requests.
Again, user@host login names are recognized, but the @host part is used to select different authentication/accounting hosts.
In the first example, all four hosts are actually defined; in the second, there is only one authentication and one accounting host.
Undefined hosts must be represented by empty strings (double quotes).
The order is @realm authhost1 accthost1 authhost2 accthost2.
'<' means that the @host part is a suffix, and '-' tells the program to strip the suffix if providing a login service.
'>' and '+' are counterparts to '>' and '-', as shown in the third example, which does what UUCPHACK has existed for.
The shared secret for RADIUS.
Protocol to be used in sessions.
Hostname used.
IP assigned to port.
You may want to left this to pick the default and define auto-generation for IPs in the defaults' settings.
Leave this to 255.255.255.255 unless you really know what you're doing.
Self explanatory.