INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Can't start default site - port 80 in use.

Can't start default site - port 80 in use.

(OP)
Windows server 2012 R2 with IIS 8.5

I have a purpose built server for running a single web base application that uses IIS and SQL server. It has been running fine until today after a reboot. The application runs out of the default site on port 80 and used to come up automatically after a restart. Today I am trying to start is manually via IIS Mgr and getting a message saying it can't start because something else is using port 80. Running "netstat -aon" shows only the system task under PID 4 listening on port 80. From what I can find on the web, that is normal behavior. If I bind the default site to port 81 it will start but that is not an acceptable solution and when I revert to port 80 it fails again. Using Sysinternals Process Explorer I have been unable to find anything rogue running on the server. I've seen references to the registry key "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HTTP\Parameters\ListenOnlyList" however that appears to be default and means the system is listening on 0.0.0.0.

I've found a number of online solutions involving identifiable applications taking over port 80, bt this server is running nothing but IIS.

Anyone have any ideas?

Jeff
"The software I buy sucks, The software I write sucks. It's time to give up and have a beer..." - Me
http://RusticPhoto.org

RE: Can't start default site - port 80 in use.

(OP)
Update: I've backed out the 2 windows updates that installed this morning, rebooted and continue to have the same problem.

Jeff
"The software I buy sucks, The software I write sucks. It's time to give up and have a beer..." - Me
http://RusticPhoto.org

RE: Can't start default site - port 80 in use.

Have you pointed a browser at it to see if anything comes up?

RE: Can't start default site - port 80 in use.

(OP)
Browsing to the server from the outside and to http://localhost from the server itself give http 404 page not found errors, so nothing else appears to be running that way either.

Jeff
"The software I buy sucks, The software I write sucks. It's time to give up and have a beer..." - Me
http://RusticPhoto.org

RE: Can't start default site - port 80 in use.

Does a
netstat -a | Find ":80"

... give you any help?

Just my $.02

"What the captain doesn't realize is that we've secretly replaced his Dilithium Crystals with new Folger's Crystals."

--Greg

RE: Can't start default site - port 80 in use.

(OP)
The only instance is the System task using PID 4. From what I've read, this is normal. I've send references to telling http.sys not listen on port 80, however that's usually for things like trying to get Apache and IIS to coexist. In any case, the method to disable that is through hidden devices in device manager, and in my case the HTTP driver does not show up when I show hidden devices.

I've also done "net stop http" to see which services are dependent on http besides web publishing. In this case I disabled Print Spooler and Windows Remote Management with no luck.

Jeff
"The software I buy sucks, The software I write sucks. It's time to give up and have a beer..." - Me
http://RusticPhoto.org

RE: Can't start default site - port 80 in use.

(OP)
Update:
I've given up on his problem and have been able to move the site to port 81. Long term this might be more stable since that's non-standard. I've seen a number of references to these exact circumstances around the web and none of them show a solution so I'm not alone.

Thanks for the suggestions.

Jeff
"The software I buy sucks, The software I write sucks. It's time to give up and have a beer..." - Me
http://RusticPhoto.org

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close