Step 23.
In the New Rule Properties window, click Tunnel Setting tab. After
that, tick The tunnel endpoint is specified by this IP Address, and then
enter "61.11.11.11" as the WAN IP address of A Company.
Step 24.
In the New Rule Properties window, click Authentication Methods
tab. Next, select the method "Kerberos" and then click Edit on the right.
(Figure 11-85)
Figure 11-84 Tunnel Setting
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(Figure 11-84)