139
Enabling application layer protocol check
1. From the navigation tree, select NAT Configuration > NAT Configuration.
2. Click the Application Layer Inspection tab.
The application layer protocol check configuration page appears.
Figure 145 Enabling application layer protocol check
3. Configure the parameters as described in Table 88.
4. Click Apply.
Table 88 Configuration items
Item Description
Protocol Type
Enable/disable checking the specified application layer protocols, including DNS, FTP,
PPTP, NBT, ILS, H.323, and SIP.
Configuring connection limit
1. From the navigation tree, select NAT Configuration > NAT Configuration.
2. Click the Connection Limit tab.
The connection limit configuration page appears.
Figure 146 Configuring connection limit
3. Configure the parameters as described in Table 89.
4. Click Apply.