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Active FTP transfer behind firewall

My FTP client application is issuing a port command to open a socket on port 1136 on my machine to receive a file from an ftp server. The command looks like this.

PORT 192,168,2,3,4,112

The question I have is why is this working despite the fact I don't have the port open on my linksys firewall?

The command doesn't work at my other site behind a different firewall.

I understand how a passive (PASV) file transfer would work but I dont get why this works.

thanks for the help.

Reply to
margerum
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Perhaps your firewall implements FTP stateful inspection, and opens this port itself.

Yours, VB.

Reply to
Volker Birk

I think thats exactly whats happening here. Thanks for the tip.

Reply to
margerum

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