Hi,
We have changed our ftp server to accept connection in Active mode and ever since pbx gets ftp connection error while we want to save backup on the ftp server.
and ftp from ssh connection gives me 421 connection error.
There is no firewall set and I see Syc/Syn-Ack/Ackj sequence in pcap, however , I get RST from ftp server when ftp client ( pbx ) is sending Syn from a port more than 45000 to ftpserver:21.
Since we have different pbxs, I can see if pbx is sending request to port 21 from any port under 45000, we get access to the ftp server, but if ports are more than 45000 , we get RST from tfp server.
Since we can not change our ftp server, any idea how to change ports in our pbx? for our ftp client?