NAT Traversal (Network Address Translator Traversal) is a computer networking technique of establishing and maintaining Internet protocol connections across gateways that implement network address translation (NAT). NAT breaks the principle of end-to-end connectivity originally envisioned in the design of the Internet.

Parameter ftpPassThru
Description Enable/Disable FTP function. NAT ALG needs to monitor and modify the packet load in the FTP command channel and update the tuple information and direction of the data channel connection to NAT so that NAT can set the status information for the FTP data session.
Permitted Values 0-Disable
1-Enable
Default 1
Web UI Application > Advanced NAT > ALG > FTP
Parameter sipPassThru
Description Enable/Disable SIP function.It enables private network terminals under NAT to interact with the SIP softswitch on the public network without any changes.
Permitted Values 0-Disable
1-Enable
Default 0
Web UI Application > Advanced NAT > ALG > SIP
Parameter h323PassThru
Description Enable/Disable H323 function.Application layer data conversion can be realized. When protocol data is sent to the Internet, the internal information of the application layer is converted to public network information, so that internal terminals can be completely hidden to achieve normal communication.
Permitted Values 0-Disable
1-Enable
Default 0
Web UI Application > Advanced NAT > ALG > H323
Parameter pptpPassThru
Description Enable/Disable PPTP function. The Call ID is converted at the same time as the source IP, and an “invisible channel” is opened for subsequent data transmission (creating a Server-map). Without this invisible channel, data packets are blocked under the control of detailed security policies.
Permitted Values 0-Disable
1-Enable
Default 0
Web UI Application > Advanced NAT > ALG > PPTP
Parameter l2tpPassThru
Description Enable/Disable L2TP function
Permitted Values 0-Disable
1-Enable
Default 0
Web UI Application > Advanced NAT > ALG > L2TP
Parameter ipsecPassThru
Description Enable/Disable IPsec function
Permitted Values 0-Disable
1-Enable
Default 0
Web UI Application > Advanced NAT > ALG > IPsec
Author：admin  Create time：2023-11-16 14:24
Last editor：admin  Update time：2024-01-03 16:20