I bought both my modem and my router, so I'd be a little incredulous if my ISP had somehow forced a port open on it. The 20005 one may be some port that NetGea

I bought both my modem and my router, so I'd be a little incredulous if my ISP had somehow forced a port open on it. The 20005 one may be some port that NetGear uses for its USB Printing, I've found some articles that mention it. It also struck me that I hit it with nmap using the LAN IP, so perhaps these are only open within the network. I probably need to hit the external IP of the router to see what is externally open. ShieldsUP! didn't show anything unusual.[1] EDIT: Disclosure of a vulnerability regarding port 20005[2], and Netgear confirming that it does affect my router[3], but should have been fixed. I assume the "fix" was fixing the buffer overflow vulnerability, rather than closing the port altogether. [1] https://www.grc.com/x/ne.dll?bh0bkyd2 https://www.grc.com/x/ne.dll?bh0bkyd2 [2] https://www.kb.cert.org/vuls/id/177092/ https://www.kb.cert.org/vuls/id/177092/ [3] https://kb.netgear.com/28393/NETGEAR-Product-Vulnerability-Advisory-ReadySHARE https://kb.netgear.com/28393/NETGEAR-Product-Vulnerability-A...