Problem

-- System with multiple IP Addresses and Network Interfaces

-- Multiple hostnames bound to different IP addresses

-- The ftpd.cfg field ADDRESS has another IP / hostname configured than the one the "hostname" resolves to. This might be required in clustered instances.

-- Check via netstat on what IP address the configured FTP port is currently listening. The exact netstat command varies per OS. E.g. "netstat -ona | grep [FTP port]" for Linux). The output shows not the expected IP Address, but the IP Address the hostname resolves to.

-- With Secure Relay, the initial connection works, but then the Master Agent shows below error, and the connection is ended.

com.axway.niocore.NIOCoreException: com.axway.niocore.NIOCoreException: Error while connecting: java.net.ConnectException: A remote host refused an attempted connect operation.

Resolution

1. Edit the parameter file internet/server/classses/ftpd.cfg in free text.
2. Remove the ADDRESS field/line completely (do not just leave the field with a blank value)
3. Save, activate and restart
4. Check again via netstat. Now the ftp server should listen to all network interfaces. For example:
   netstat -ona | grep 9234
   tcp 0 0 0.0.0.0:9234 0.0.0.0:* LISTEN off (0.00/0/0)