Configuring Application Layer Gateways

Last published : Sep 30, 2026
For some Application layer protocols, the IP addresses and protocol port numbers are also communicated in the packet's payload. Application Layer Gateway for a protocol parses the packet’s payload and does necessary changes to ensure that the protocol continues to work over LSN.
The NetScaler appliance supports ALG for the following protocols:
  • FTP
  • ICMP
  • TFTP
  • PPTP
  • SIP
  • RTSP
Related information
Large Scale NAT
Application Layer Gateway for FTP, ICMP, and TFTP ProtocolsApplication Layer Gateway for PPTP ProtocolApplication Layer Gateway for SIP ProtocolApplication Layer Gateway for RTSP ProtocolApplication Layer Gateway for IPSec Protocol