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ALG
Expert > NAT Forwarding > ALG
Application Level Gateway (ALG) settings are advanced functions that can resolve issues where services are disrupted by the
firewall. Each ALG module is a security component that augments the firewall. Services such as VPNs or Virtual Servers may
require ALG modules enabled. By default all ALG modules are active. Use the switches to disable any ALG module required. ALG
Settings are recommended for expert users only.
SIP ALG may disrupt WiFi calling for cellphones connected to the network.
Manage ALG Settings
PPTP Passthrough
Point-to-Point Tunneling Protocol (PPTP) is a module for
implementing virtual private networks.
L2TP Passthrough
Layer 2 Tunneling Protocol (L2TP) is a tunneling
protocol used to support virtual private networks (VPNs)