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user_2f5e21
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Saturday, February 26th, 2022 6:59 PM

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Can't open port

I own my modem and router. I am very familiar with Port forwarding and have configured everything correctly. However my port test still shows the port closed. Does Xfinity have to open the port at your end for this to work?  All help areas direct me to Xfinity owned hardware and routine port forwarding instructions. Simple question - do you need to enable something at your end? 

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3 years ago

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CCAnna

Problem Solver

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874 Messages

3 years ago

Thank you for reaching out over Xfinity Forums @user_2f5e21. Our team would be happy to help find a solution to your issue. I am sure this has caused you quite the headache. To answer your question, no, we will not need to enable anything on our end. 


First, have you looked at our blocked ports list? Find out which ports are blocked by us and why using this link https://comca.st/33ZhlEg. 


What type of modem and router are you using? I understand you are very familiar with port forwarding but I always recommend taking a look at this step by step document just to make sure everything is perfect https://comca.st/3Huo9aA.

 

Our team will be on standby to continue troubleshooting if needed!  

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geekrawker

New Poster

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2 Messages

@XfinityAnna​  I've had this issue for over 2 years. Using non blocked (your list) and non standard does not work.  Also tried adding devices into "profiles" like previous support req's have suggested, still nothing.   I wish comcast would just admit that our "WAN" IP we receive is inaccurate (ie. not our real wan IP as we are behind another managed DNS switch (try a DNS resolve on your given WAN IP, you'll see it resolves to a internal managed switch DNS name).    Come on Xfinity/Comcast, give us back port control.    #angry customer for many years (also pay for 1gbps but only pull 200mbps, solid service).

3 years ago

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XfinityAldrik

Official Employee

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2.1K Messages

Hello @geekrawker, thank you for reaching out to us on our community forums. As Anna mentioned, our Blocked Internet Port List is really helpful to use in order to make sure the port you are using is not blocked. It would appear you have already gone over this list to make sure your port isn't blocked. 

 

When setting up a port forward through the gateway admin page, it is important to make sure a static IP was not set for the device. 

 

We also want to make sure the device is using an IPv4 address to connect to the network and not an IPv6.

 

You mentioned having slow download speeds, is this happening on a hardwired or wireless connection?

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3 years ago

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