This is a problem I've had for years and never found a solution. I have an AEBS and whenever I do a portscan outside of my network it ALWAYS shows ports 7070 554 and 21 open, even when the host doesnt have those ports open. When I replace my AEBS with a regular Linksys router, these ports dont show up in my nmap scans. It's very strange.

I've only found a few posts talking about it but never any solutions. http://discussions.apple.com/message.jspa?messageID=7252565

Anyone else use an AEBS and experience the same behavior? I've tried wiping the device and starting fresh, I'm also running the latest firmware. When looking at a packet capture, you actually see the TCP handshake complete. Any other folks have this problem? Did you fix it?

BTW - I still havent found a solution for this problem and have read in multiple places that it is an issue for others.

My workaround has been to put the AEBS in bridge mode and use another device for my FW/NAT. It's an extra hop in my network but at least I get accurate results until they fix it!