What is blocking port 80?

[Cameron Roe[home]]

Thanks ken,but no joy so far. :)  - See Below



-- Two things to check:  
--
-- 1) check your router - it may be that you don't have port forwarding
-- configured correctly
<CR> I put the YDL computer into the DMZ. Means that the YDL machine is wide
opent to the Internet. As proof - I can telnet or FTP to it and it's fine.

-- 2) check your ISP's Acceptable Use Policy - some ISPs don't allow/block 
-- connections to low level ports, specifically SMTP and HTTP.  Some don't
want 
-- you send email from your machine, like spammers do, or make money hosting

-- websites they should be making money doing.
<CR> I called the ISP and they said that the don't block any ports. 


-ken

-----Original Message-----
From: yellowdog-general-admin@lists.terrasoftsolutions.com
[mailto:yellowdog-general-admin@lists.terrasoftsolutions.com] On Behalf Of
Ken Schweigert
Sent: September 21, 2004 3:02 PM
To: yellowdog-general@lists.terrasoftsolutions.com
Subject: Re: What is blocking port 80?

On Tue, 21 Sep 2004 11:01:36 -0600, camroe@telusplanet.net
<camroe@telusplanet.net> wrote:
> Hi all,
> 
> So I'm trying to run an Apache web server on my YDL.
> I'm running Apache 2.0.50 on YellowDog Linux (YDL) Release 3.0, Kernel 
> version 2.4.22-2f. I am running it behind a D-Link DSL firewall/router 
> DI-601. My YDL machine is assigned a local IP 192.168.1.5.
> I was screwing around with the port forwarding but wasn't having any 
> luck so I put the YDL in a DMZ (i.e. WAN has ALL access to this 
> machine) I can FTP and Telnet to it using the dynamically assigned ISP 
> IP address of the router
> (199.21.148.227 ... and no that's not the real address :)  )
> 
> The problem is that when I  browse to the address (199.21.148.227) I 
> expect to get the Apache test page, but I get 'The connection was 
> refused when attempting to contact 199.21.148.227'. I can brows to the 
> 192.168.1.105 from another machine on my local home network, but I 
> can't get to it from an external machine - i.e. at the office. I've 
> tried both netscape and IE, as well as tried to telnet to port 80 
> (tenet 199.21.148.227 80), but still get connection refused. I've 
> checked the Apache logs and there are no access_log entries or 
> error_log entries. That there are no entries confirms my belief that 
> Apache never gets the request and that port 80 is being blocked from
external access.
> Thanks for your help!!!
> 
> Cam

Two things to check:  

1) check your router - it may be that you don't have port forwarding
configured correctly

2) check your ISP's Acceptable Use Policy - some ISPs don't allow/block
connections to low level ports, specifically SMTP and HTTP.  Some don't want
you send email from your machine, like spammers do, or make money hosting
websites they should be making money doing.

-ken
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