UPnP device accessible via public IP when on internal network only why?

1

Setup my Foscam IP camera last night on the wireless network using UPnP and was able to access it fine via the public IP using another PC on the same network with no issues.

However when I tried to access it from work it doesn’t connect. I’m using a Netgear CVG824G router. Is there a firewall setting that I’m overlooking?

mindfriction

Posted 2012-03-27T23:21:35.437

Reputation: 161

1Do NOT ever expose UPnP to the internet, hackers will surely take advantage of it as it has no security at all. – cybernard – 2019-02-15T03:21:59.163

1There's a lot of things it could be. It could be a setting in your own device. It could be that your ISP filters the port you're using. It could be that your router can't forward that particular port. (For example, many routers can't forward port 80.) – David Schwartz – 2012-03-28T01:16:24.757

Thanks Dave! Soon as changed to a different port other than 80 it worked! – mindfriction – 2012-03-28T10:18:10.560

Depending on the router, moving its administrative interface to a port other than 80 might let it forward port 80. It's also possible your ISP filters port 80. – David Schwartz – 2012-03-28T10:19:55.470

Answers

1

Use your own NAT rules and try to not forward to a port which may be used by the router like the 21, 22, or 80.

IMAnis_tn

Posted 2012-03-27T23:21:35.437

Reputation: 181