R3721-F3210-F3171-HP High-End Firewalls Access Control Configuration Guide-6PW101

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You can specify a source IP address for outgoing RADIUS packets in RADIUS scheme view for a specific
RADIUS scheme, or in system view for all RADIUS schemes whose servers are in a VPN or the public
network. Before sending a RADIUS packet, a NAS selects a source IP address in this order:
• The source IP address specified for the RADIUS scheme.
• The source IP address specified in system view for the VPN or public network, depending on where
the RADIUS server resides.
• The IP address of the outbound interface specified by the route.
To specify a source IP address for all RADIUS schemes in a VPN or the public network:
Step Command Remarks
1. Enter system view. system-view N/A
2. Specify a source IP
address for outgoing
RADIUS packets.
radius nas-ip { ip-address |
ipv6 ipv6-address }
[ vpn-instance
vpn-instance-name ]
By default, the IP address of the outbound
interface is used as the source IP address.
To specify a source IP address for a specific RADIUS scheme:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RADIUS scheme
view.
radius scheme
radius-scheme-name
N/A
3. Specify a source IP
address for outgoing
RADIUS packets.
nas-ip { ip-address | ipv6
ipv6-address }
By default, the IP address of the outbound
interface is used as the source IP address.
Setting timers for controlling communication with RADIUS servers
The firewall uses the following types of timers to control the communication with a RADIUS server:
• Server response timeout timer (response-timeout)—Defines the RADIUS request retransmission
interval. After sending a RADIUS request (authentication/authorization or accounting request), the
firewall starts this timer. If the firewall receives no response from the RADIUS server before this timer
expires, it resends the request.
• Server quiet timer (quiet)—Defines the duration to keep an unreachable server in blocked state. If
a server is not reachable, the firewall changes the server status to blocked, starts this timer for the
server, and tries to communicate with another server in active state. After this timer expires, the
firewall changes the status of the server back to active.
• Real-time accounting timer (realtime-accounting)—Defines the interval at which the firewall sends
real-time accounting packets to the RADIUS accounting server for online users. To implement
real-time accounting, the firewall must periodically send real-time accounting packets to the
accounting server for online users.
Follow these guidelines when you set timers for controlling communication with RADIUS servers:
• For a type of users, the maximum number of transmission attempts multiplied by the RADIUS server
response timeout period must be less than the client connection timeout time and must not exceed
75 seconds. Otherwise, stop-accounting messages cannot be buffered, and the
primary/secondary server switchover cannot take place. For example, the product of the two
parameters must be less than 10 seconds for voice users, and less than 30 seconds for Telnet users