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Configuring Serv-U and Serv-U Gateway  -  KB Article #2162

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Serv-U Server cannot access Serv-U Gateway.


Make sure that you meet the following requirements so that Serv-U Server can communicate with Serv-U Gateway:

  • Port 1180 must be open on Serv-U Gateway so that Serv-U can access the Gateway.
  • If Serv-U Gateway only has a public IP address, add the IP address of Serv-U to the CIDR text file of the Gateway, so that the Gateway can accept connections from Serv-U.
  • Verify that Serv-U and Serv-U Gateway have IP addresses which can communicate with each other.

The following setups are supported:

The following setup is not supported:

  • Serv-U with Public IP --> Gateway with Private IP

The following image shows an example configuration if you use one Gateway for two Serv-U servers:


  • Serv-U listeners: DMZ IP D:80
  • Serv-U listeners: DMZ IP D:81


  • Port forwarding from Public IP F:80 to DMZ IP D:80
  • Port forwarding from Public IP F:81 to DMZ IP D:81

According to the IANA definition, the following ranges are private IP addresses:

  • - (10/8 prefix)
  • - (172.16/12 prefix)
  • - (192.168/16 prefix)