Learn how to install the AT&T Cell Booster behind a firewall, or behind a router with firewall capabilities.
1. DHCP is ON.
Note: For installations where static assignment of an IP address is desired the use of MAC Binding and static DHCP Reservation is suggested. Static IP is not supported.
2. MTU size is set to 1500 or higher.
3. MAC address filtering is either turned off or allows the MAC address of the Cell Booster.
4. IPSec Pass-Through is Enabled.
5. Block Fragmented Packets is Disabled.
The UDP ports 500 and 4500 are used to establish the IPSec tunnel. The NTP port is required to be open as the NTP sync messages are sent on the public internet for frequency synchronization. All traffic except NTP will go through the IPSEC tunnel and hence only these ports should be unblocked for the AT&T Cell Booster to provide service.
Note: If you have a firewall enabled, the below UDP Ports need to be open to prevent the firewall from blocking communication with the network. Please contact your Internet Service Provider for assistance.
• UDP/ 500 IPSec Port
• UDP / 4500 IPSec Port
• UDP/ 123 NTP Port (Timing Synch)
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