Port of Frustration

Posted on 2006-05-31
Last Modified: 2010-03-17
I have a web server. Port 80 is blocked (per Shields up test at

My router has port 80 forwarded to the correct address.
My firewalls have port 80 in the exclusion list, and besides that....they are all off.

Port 80 is STILL blocked. Where else can I look?
Question by:DrDamnit
    LVL 27

    Expert Comment

    Can you telnet to the web server over port 80 and issue a get?

    telnet webserverip 80

    This verifies 80 is open and listening.

    Is the webserver staticlly assigned?

    What kind of router do you have?  What kind of firewalls do you have?
    LVL 9

    Expert Comment

    have you tried forward and reverse lookups on the dns name/ip they might be testing a different site.
    verify here

    also do you have an acl's on the server itself limiting traffic?

    have you looked at your router and see if your packet count is going up on the rule allowing the traffic?
    LVL 31

    Accepted Solution

    Could of course be your ISP blocking external port 80 requests to regular subscribers (home connections). If you have a business-type connection, talk to your ISP helpdesk.

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