03-16-2008 6:52 PM
03-16-2008 11:01 PM
03-17-2008 9:14 AM
Eyedox wrote:Does AT&T block port 80 for inbound traffic? I have an HAI Omni IIe ... I am trying to setup Web-Link II software for remote access using my home desktop as a server and am having problems getting access remotely. I have dynamic IP updating using dyndns. I have tried opening up the appropriate ports on the R/G firewall and have checked those ports on the windows software firewall too.I think I just need ports 80 (http) and possibly 8080 (video) open ... internally my HAI Omni IIe communicates locally to the server on port 4369 but I dont think the firewall needs that opened up as I can access the Web-Link II software and system locally on the server computer. I have installed IIS and and running WinXP Pro SP2.Also, do I want TCP or UDP when I am opening ports on the R/G?? I got my Slingbox figured out no problem with the firewall, but this has stumped me, and it should be as easy as setting up a simple webpage. Can anyone help me figure this out? Help! Oh also, AT&T has been blocking all emails from DynDns.com for account verification so I had to sign up with a different email address ... how weird is that?!
03-17-2008 9:43 AM
03-17-2008 10:08 AM
07-13-2009 1:53 PM
07-13-2009 2:52 PM
07-14-2009 10:55 PM
12-11-2010 7:41 AM
AT&T has recently started blocking all major ports for servers.
I had been running successfully a web server on port 80, and SSH on port 22.
Port 25 has always been blocked as far as I can tell.
My router is configured properly as it was before, but one day all of my servers stopped working when accessed from outside the local network.
I checked things out using an online port scanner and ports 80 and 22 are not accessible.
I double-checked this by changing the ports that my servers operate on to a non-standard port like 762 or 777.
After changing my configuration to use a non-standard port, everything works fine when attempting to connect from outside the local network
This means that AT&T has recently started blocking all of the major server ports for telnet,ssh,and web servers.
12-11-2010 7:49 AM
I am running the uverserealtime.com web site at home on port 80 and it is running fine.
Port 25 inbound is not blocked, only port 25 outbound is blocks by default and they will remove that block if you request it.
Check your configuration, I don't think AT&T is blocking anything that they weren't blocking before.
12-11-2010 9:38 AM
Upon closer inspection, I found that even though my FIREWALL showed that the ports were open, after reconfiguring the firewall from scratch, ports 80 and 22 are working again. I suppose that something must have changed during an update as I never modified the firewall betweent he time the servers worked and the time the servers failed to work.
Sorry for the previous post. I was mistaken.
12-12-2010 8:21 PM
While BIOS / Firmware updates are not supposed to change settings, I would assume that on occasion, they might mess up complicated or non-standard configurations.
Just yesterday, I decided it was time to reboot my gear. And I found that my RG had been up only 15 days ... so clearly AT&T is uploading new images and the such semi-frequently. In my case, my gear behind my RG hadn't been rebooted in 72+ days, but like I said, I guess I got a new RG image in the past several weeks.
But direct to this post - My understanding (and personal experience) is that AT&T only blocks port 25 outbound to prevent SPAM. However, the RG necessarily squats on some ports for VOIP / SIP, that in some cases will cause issues for people trying to run VOIP/SIP gateways behind the RG. While there clearly could be other ports that have similar conflicts, I am not personally aware of a list of them ... if someone reading these threads is building a list ... bit would be a great addition to the community (hint hint).
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