Edimax BR-6428nS V5 User Manual page 41

DNS Settings
III-3-5. WAN Security
SPI firewall
VPN
ALG
Enable/Disable DNS Settings
Enable or disable the stateful packet inspection (SPI)
firewall.
Supports enable/disable PPTP passthrough, L2TP
passthrough and IPSec Passthrough
Application Layer Gateway (ALG) is a network
security gateway which supports specific network
applications such as gaming and instant messaging.
ALG enables these applications to communicate with
their server.
Supports enable/disable FTP ALG and TFTP ALG
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