Search | Archive | Categories
Well, after configuring everything on my computer, I kept wondering why I wasn't able to hit my web server from work. At home, I had no problem accessing it via the domain name. Then it occured to me that that Comcast must be blocking incoming port 80. I downloaded the port scanning software below and verified that port 80 is indeed blocked. Hopefully, this will just be a minor setback.

Self port scan:

Remote port scan:
About list

Posted: 2003-08-13 19:54:39

Comments: (7) 

wow, i need to learn more about computers. hehe....that's good you figured out what was wrong.

beej - 2003-08-15 00:06:11

Hey Beej,

Well, it seems like you're stepping up too now that you have your own domain. It's the only way to go and gives you the ultimate control.

Oliver Tseng - 2003-08-15 07:46:20

Hey, did you find a way around it? I just switched back to cable from DSL and I loath appending a port assignment to a domain name i'm paying for!

Jason - 2004-04-01 12:11:24

I was sort of able to do a workaround. I used a dynamic dns with web forwarding that forwarded port 80 to another port (8080). Though this works, I couldn't access it from work cause they block almost all ports.

See here for more info:

So, I just gave up since there were just too many barriers.

Oliver Tseng - 2004-04-01 12:42:11

Hey, Is there any place where I can find a tutorial on how to work around it? I have been working forever on getting a HTTP server and FTP server up but i just found out that comcast block port 80

will - 2004-05-18 16:11:53

Try to do it.

Sign up for their services. For the destination url, use:

(replace xx.xx.xx.xx and subdomain)

On your http server, use port 8080 instead of port 80.

Now, when someone makes a request to your domain, it will get redirected to the destination url.

You can also "cloak" it so that the redirection is transparent to the user.

Oliver Tseng - 2004-05-18 17:22:44

DNS redirection

Two of my firends have this same issue luckly I didnt. I did though find ways arround them, there is the simple host it on a different port that is then not blocked by the ISP it doesnt have to be 8080 it could be 8280 or just about anything. So if you really want yourself and others to type in a long adress with the port you can do that otherwise you can dns redirectioning.

To redirect the dns to your site have your servers running, you can have a dns for your ip already that is ok. A good site that I found for this with a good free DNS is set an account up here, after setting up make a redirection dns and have it point to eirther your current DNS or your ip, a current DNS is better if you have it because your ip may change (if it is not static) so enter your current host name with the long port numbers following it.

real adress: (remeber that since this is not the default port of 80 you must type in http for your site if its not there..)
or real adrress can be your ip

there are many other sites that have dns redirection for free such as and

now you can surf your server at your work or anywere in the world with a gay port block on port 80 from your ISP (haha ftp is another story that i have net yet walked)

any questions about networking you can contact me at I will help you forsure and put plenty of time into helping you if thats what it takes.

the 15 year old computer genius - 2007-04-04 04:11:14

Please login to post comments

<< Using port 8080De-dehumanizing Humans >>