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Setup Serv-U Gateway on Public IP Address  -  KB Article #2131

Related Articles -- 2162

Issue:

Serv-U Gateway by default does not listen for Serv-U control connections on 1180 on any public IP addresses as most customers use private IPs combined with static NAT rules in their DMZ.

The following gateway configuration setups are supported:

  • Serv-U with Public IP --> Gateway with a different Public IP with CIDR
  • Serv-U with Private IP --> Gateway with Public IP with CIDR
  • Serv-U with Private IP --> Gateway with Private IP

The following gateway configuration setup is not supported:

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

Customers who use public IPs in their DMZ segment, will need to edit Gateway's "Accept-Public-IP-CIDRs.txt" file to include the IP scope of Serv-U.

Reference file for example:

// Serv-U Gateway Public Address Listening File
// 
// If any IP address CIDR entries below are uncommented (removal of leading //),
// then Serv-U Gateway will listen for incoming Serv-U control connections on all
// public IPv4 and IPv6 addresses on this machine.
// 
// Entries below control the IP addresses from which Serv-U control connections
// will be accepted.  These entries MUST be full CIDR notation.  For a detailed
// explanation of CIDR notation visit these pages:
//
//		http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing
//		http://www.subnet-calculator.com/cidr.php
//		http://www.dnscrawler.com/tools.php
//
// -------------------------------------------------------------------------------------
// IpV4 Example: Gateway has an IP address of 11.11.11.11; Serv-U is connecting from
//               22.22.22.22
//      - No entry is necessary for the 11.11.11.11 address because Serv-U Gateway will
//        listen on all public IP addresses
//      - The following CIDR access control entry is necessary to receive Serv-U control
//        connections from 22.22.22.22
// 22.22.22.22/32
// -------------------------------------------------------------------------------------
// IpV6 Example: Gateway has an IP address of 1111::; Serv-U is connecting from
//               2222::
//      - No entry is necessary for the 1111:: address because Serv-U Gateway will
//        listen on all public IP addresses
//      - The following CIDR access control entry is necessary to receive Serv-U control
//        connections from 2222::
// 2222::/128


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