I am debugging access to a remote service via. my Debian VPS. IPTables is used and allows outward port 21 traffic. The remote service is an FTP server (which I can access from my own PC and is not blocked by the remote service). I have also checked that Debian can access FTP servers (which it can).
I am wondering, what might Debian be using to block the IP? IPTables shows no blocked IP addresses. I also have dos-deflate installed although I have set that up for iptables. Any ideas on what might be blocking the connection?
PS: I get a "Connection Refused" when trying to use WGET to access the remote FTP (wget works with another FTP I used for testing).