H3C Technologies H3C SecPath F1000-E - Manual (Page 214)

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When the firewall receives a connection teardown request from a host or a connection teardown
command from an administrator, it sends a stop-accounting request to the accounting server. You can
enable buffering of non-responded stop-accounting requests to allow the firewall to buffer and resend a
stop-accounting request until it receives a response or the number of stop-accounting attempts reaches
the configured limit. In the latter case, the firewall discards the packet.
Follow these guidelines when you configure HWTACACS accounting servers:
• An HWTACACS server can function as the primary accounting server of one scheme and
simultaneously as the secondary accounting server of another scheme.
• The IP addresses of the primary and secondary accounting servers cannot be the same. Otherwise,
the configuration fails.
• You can remove an accounting server only when no active TCP connection for sending accounting
packets is using it.
• HWTACACS does not support accounting for FTP users.
To specify HWTACACS accounting servers and set relevant parameters for an HWTACACS scheme:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter HWTACACS scheme
view.
hwtacacs scheme
hwtacacs-scheme-name
N/A
3. Specify HWTACACS
accounting servers.
• Specify the primary HWTACACS
accounting server:
primary accounting ip-address
[ port-number | vpn-instance
vpn-instance-name ] *
• Specify the secondary HWTACACS
accounting server:
secondary accounting ip-address
[ port-number | vpn-instance
vpn-instance-name ] *
Configure at least one
command.
No accounting server is
specified by default.
4. Enable buffering of
stop-accounting requests to
which no responses are
received.
stop-accounting-buffer enable
Optional.
Enabled by default.
5. Set the maximum number of
stop-accounting attempts.
retry stop-accounting retry-times
Optional.
The default setting is 100.
Specifying the shared keys for authenticating HWTACACS packets
The HWTACACS client and HWTACACS server use the MD5 algorithm to encrypt packets exchanged
between them and use shared keys to authenticate the packets. They must use the same shared key for the
same type of packets.
To specify the shared keys for authenticating HWTACACS packets:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter HWTACACS scheme
view. hwtacacs scheme
hwtacacs-scheme-name
N/A