I have setup an Ubuntu 10.04(LTS) server at home that is used as a web server. Primarily to give me access to my private cloud where I have 2TB of storage available to me. I am using OwnCloud for this and I installed Webmin to make administering my server easier. I am also running FOG server which is an imaging server that allows PC's on my network to boot via PXE.
I got everything setup yesterday and was even able to login to my server using my domain (mydomain.com). I can view my root index page and access everything just fine when I'm using my home PC, but while I'm at work, I can't reach the default page, or anything else on port 80. My router on port 8080 is accessible, my Webmin interface is too (port 10000). I can even remote into my server over SSH (port 22), but port 80 seems to be dead.
I called Comcast and they told me that the port was not being blocked. I can't figure out why port 80 will not go through while I am at work, but works fine at home. Also, I am using an open access point from work, so as to go around all their network restrictions. I have even tried using the WiFi hot-spot powered by my phone with the same results.
Any help is greatly appreciated.