See solution at end of this post ..

[ORIGINAL POST]
I am on Windows XP using ZoneAlarm Pro (7.0.337).
Broadband, direct connection via cablemodem, no router in the way.

I am trying to troubleshoot "connection timeouts" from dyndns.org accounts I have setup.

When I launch a dyndns URL .. http://mydnsname.dyndns.org
no connection is made to my localhost server on port 80 (or any other port) so dyndns routes instead to the offline URL's.

I am using a dyndns client which echoes back my IP address to dyndns.org.

....

In ZoneAlarm Pro I started by enabling custom TCP/UDP ports(80, 8090) ..

Internet Zone .. high security .. custom settings ..
Allow incoming UDP ports: 80, 8090
Allow outgoing UDP ports: 80, 8090
Allow incoming TCP ports: 80, 8090
Allow outgoing TCP ports: 80, 8090

but still no connection from dyndns accounts.

....

Then I tested connection to my localhost:80 using only my current IP address ..
e.g. this echos back IP address .. http://checkip.dyndns.org/

then tried using that echoed IP address to access my localhost in browser.

http://xx.xx.xx.xxx

but again I get a connection timeout .. ?????

....

A ShieldsUp!! port probe (http://www.grc.com) gives this report ..

Results from scan of ports: 0, 21-23, 25, 79, 80, 110, 113,
119, 135, 139, 143, 389, 443, 445,
1002, 1024-1030, 1720, 5000

0 Ports Open
0 Ports Closed
26 Ports Stealth
---------------------
26 Ports Tested

ALL PORTS tested were found to be: STEALTH.

TruStealth: PASSED - ALL tested ports were STEALTH,
- NO unsolicited packets were received,
- NO Ping reply (ICMP Echo) was received.

....

Why can't I make connection to my localhost with just my IP address in browser URL?

This is the case even if ZoneAlarm zones (Firewall > Main > Internet/Trusted/Block Zone Security) are set to Off (for testing). So this failure to connect might not be a ZoneAlarm issue.

Port Detective gives a different result to ShieldsUp!! and shows port 80 in use.

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[RESOLVED]

I have, at last, solved the above problem which was puzzlng me.

I uninstalled Norton using advice here to use Symantec Norton Removal Tool ..

Norton Removal

..

My ZoneAlarm > Firewall > Zone Security levels are set to Medium

My dyndns accounts now work with the authorised ports.

And I can now access localhost using my IP address.

..

Message Edited by alphabeta on 04-18-200710:40 AM