A client is running a secure ftp server on a non-standard port. I had our isp forward this port to a pc on our lan. Although I can apparently ping the server from the pc: "nmap -PN -p [port] [ip address]" returns
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Nmap scan report for [ip address]
Host is up.
PORT STATE SERVICE
[port]/tcp filtered unknown
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I can't establish an ssh, ftp, or sftp connection via shell, or filezilla ftp client. I don't think it's a login issue, the connection attempts just time out. The server admin said he might need to add my ip address to their firewall white list, in the meantime I'm trying to determine if the problem could be at my end: "nmap -p [port] [lan ip address]" returns
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Interesting ports on [lan ip address]:
PORT STATE SERVICE
[port]/tcp closed unknown
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Not sure what this means. Do I need to open this port on the local pc (it does not have a firewall, and allegedly default iptables allow all traffic)?
Or does "closed" just mean the port is not currently in use?
EDITED: 28 Nov 2012 20:58 by DSMITHHFX