Does comcast block port 443. If I was in your same Sep 16, 2022 · I have a web server inside my network. Will I be able to set up the GRE (VPN) network through the Comcast Business gateway? Jan 30, 2024 · To fix the 443 error code, add a new inbound rule to the firewall, terminate the process using Port 443, or uninstall the application. Understanding how to configure port forwarding, a crucial aspect of network management, is essential for optimizing performance, hosting services, and ensuring seamless communication for various applications. 4 days ago · Ensure that outgoing traffic on TCP port 443 is not being blocked or throttled on your side. Some of them include Xfinity xFi gateway, xFi advanced gateway, XB6 wireless, and more. They block ports such as 25 and 80 as well to prevent someone from running a "business service" from their home. This configuration uses port 443, which is widely open outbound to support HTTPS, instead of port 445. The first time you sign in to My Account, you will be taken through a guided tour to configure your system. It originally worked fine, then a few months ago started to fail. Find the Reasons for Blocking Listed Below. Find out which ports are blocked by Xfinity and Comcast services, and why. Explore how TLS handshakes work and why HTTPS matters for your online security. I need to know how to unblock ports 8883 and 53. I reached out and recieved this response: There are only a few ports that are already in use that cannot be used for port forwarding, and unfortunately port 443 is one of them. I set the forwa We would like to show you a description here but the site won’t allow us. If those ports are no longer on the current list, it's possi b let that not all of the internal infrastructure was updated with the new rules. I'll also gently point out again that port 80 and 8443 work appropriately while 443 is filtered on Xfinity's end. Try setting up a VPN Gateway on the Azure side for a point to site tunnel to just tunnel in and Some folks have zero issues with the default port, and Comcast SWEARS they aren't blocking any incoming ports. All information on the internet passes through ports to get to and from computers and servers. I know its alot of NAT's and that, but its mostly just for testing. 8:443 forwards to my router, which then forwards to the device on my router serving HTTPS traffic. Sep 23, 2021 · LAN-to-WAN : Allow all. Nov 22, 2024 · Getting new firewall to replace old one, setting it up behind Comcast cable modem? Business has one static IP address from Comcast. 1, which means the DHCP addresses available range from 10. I currently run the DuckDNS addon, but I’m Sep 6, 2023 · 465 is not deprecated, for example Gmail and Yahoo support it. Any time I scan my computer from the public Sep 28, 2023 · I then tried wireguard on port 443, which again didn’t work. Please note, a warm transfer will display the extension of the person transferring the call to the recipient. A subreddit primarily dedicated to asking questions and/or discussing experiences with Comcast. They are probably blocking 445 for the same reason and potentially to mitigate against the SMBv1 vulnerability. Here is a complete guide on port forwarding comcast router. Does anyone know if they just block all incoming traffic? Does Comcast block any ports? Ports on the internet are like virtual passageways where data can travel. Not strictly related, but I'd like to take this opportunity to whine about them blocking inbound connections to port 25. It is true that the TOS disallows “servers” but Comcast, in its history, has not blocked either port 80 or 443 incoming. I have forwarded many ports and am reasonably proficient. Jun 29, 2010 · What all does Comcast block? Most ISPs only block 80, 443, and 25 to prevent people from running web/mail servers. Verify that there are no issues with the router settings, such as firewalls or active ALG settings, that might prevent the VPN from connecting. The only issue I see for ASL users is if you use sendmail or other message system utilizing tcp port 25 (system notifications and voicemail to email for me) Which is a issue I have for one server, but there are creative ways around this. It works fine if the connecting device is not in the home network, but it fails to connect if the device is in my Mar 24, 2025 · Understanding Ports and Routers Before we dive into the process of checking if a port is blocked on your router, let’s first understand what ports and routers are. I apologize, it does not look like there is a way to unblock TCP 445 or any other ports that Xfinity blocks for security purposes. The public addresses can also be NATed to internal services on a private network address. HTTP and HTTPS (TCP port 80, 443 Apr 10, 2020 · For example, if you had multiple web servers that used port 443, you could access them each separately via unique public IPs on port 443 without having to use alternate TCP ports on a single public IP. com with HTTPS you will notice that there is no connection on port 443. We would like to show you a description here but the site won’t allow us. See SSL Labs eval of forums. Reply reply [deleted] • Comment deleted by user Reply reply TheQuarantinian • FAQs What is TLS and what versions do you support? Transport Layer Security (TLS) encrypts or conceals communication between two parties and uses certificates to authenticate the identity of the parties. Oct 16, 2025 · Understand port 443: the gateway for encrypted web traffic. However, I am seeing that port 80 and 443 are not blocked so you should be good to go with those ports. Short Story: I disabled advanced security, deleted and readded the port forwards. I was using a high number in replace of 80 for http but it is now blocked. com . I need 22 (ssh) 80 (http) and 443 (https) and have a system which accepts connections and does work for me. But most ports seem to be dropped. The traffic is managed by blocking or redirecting certain traffic, based on the port numbers that the traffic is using. This works. I am already forwarding port 25565 and it is working fine. Introduction Find out which ports are blocked by XFINITY and Comcast services, and why. Ports are used to direct traffic to the correct application or service on a network. This may cause issues with Apple Mail on iOS when using the default settings. To learn more about this option, see SMB over QUIC with Azure File Sync. I found Cox began blocking my port 80. Feb 9, 2017 · A bit of an update. Had to go as far as chewing out a technician for having port filters in place for a small business who has a hardware firewall, and the support over and over said they were not blocking X port, even though their site says they do, and we couldn't get any (logged) traffic on the port. Both port 80 and 443 weren't working. Have recently had issues with site-to-site VPN on old setup, wa Jan 28, 2025 · How do I determine if Ports 10009, 9080 and 443 are open? Apr 5, 2023 · Ports 53, 80, and 443 are open on my Gateway but not 3389. Port 3389 is open on my PC. Sep 28, 2022 · Is Comcast blocking port 80? Your assumption that the “appropriate ports are blocked” is incorrect. See the list of blocked Internet ports. Sep 26, 2023 · PLEASE do not give yet another instruction on how to port forward. A port is a number that is used to identify a specific process or service running on a computer or network device. If you try to connect to forums. WAN-to-LAN : IDS Enabled and block as per selections below. They both do block activity on select ports, more so residential. I called Xfinity… It does seem like using my own equipment would be best, but I was perfectly fine with this free equipment (included with cable plan) until port 443 broke some time in the last few weeks. Port checkers CONFIRM it is being seen. I am able to port forward on my router just fine, and some ports like port 80, 443, 8080, forward and are not blocked. I use multiple email clients. Is there another setting I'm overlooking? My investigation shows that there is something happening with ports 80/443 on the Comcast gateway, but only when hit internally, that blocks even port forwarding rules. A few days ago, my Let's Encrypt automatic certificate generation has been failing. Jan 18, 2021 · Comcast business modem blocking inbound VPN connectivity. However, I still believe this might be a possibility since I have experienced so much bitter frustration in trying to make this work. The caller is automatically placed on hold. Access to a specific port has to be handled either by a IP assignment to the device (your firewall) or by port forwarding from the gateway to the device, and the application has to be active on that particular port. I have tried ports 8000, 8001, 1025, 7777,7778,27015, etc. The following content is only applicable to Business VoiceEdge customers. Mar 4, 2025 · If I were to switch from comcast, I would need to be able to accept external connections on those ports. Outbound is working as expected and shows the proper static ip's as configured. Apr 12, 2013 · Inbound traffic seems to be blocked on ports 443 and 22 on each device connected to the Comcast-netgear 4-port switch. Comcast offers several different models of routers, including ones that support the latest Wi-Fi standards, advanced security features, and parental controls. Does Comcast block port forwarding? Ports on the internet are like virtual passageways where data can travel. Comcast supports 465 and 587 to smtp. I GUARINTEE it. The firewall settings are a little disappointing. However, whenever I want to open up other non-standard ports, such as game-server ports like 7707 or 20560, the app/router says they're open, but the game itself and other 3rd party tools says the ports are still closed. x, where x is 2-254) then the Comcast gateway is NOT in bridge mode. Jul 15, 2023 · Comcast is the worst, by far, because they love playing games with these MITM shennanigans, or they randomly enable their "XFinity Security Suite" and block traffic (and have tried to charge us Oct 4, 2025 · ️ Does Xfinity/ Comcast block VPN? In the past, Comcast was infamously renowned for such practices that led to Xfinity not working with VPN. Dec 5, 2014 · I have business class internet and am trying to setup a new VOIP system. During a call, press Transfer. Long Story: I moved a few weeks back and moved my Xfinity service to my new location. 2 to 10. May 4, 2014 · As I have said elsewhere in the thread the first 1024 ports are open in most router to allow things to work Out of the Box such as Mail (110, 25, 567, 569, 995, 996 and many more ) and web Browsing (port 80 mostly but secure site can use 443) FTP (21 and 22) to name some. Sep 18, 2015 · My ISP (Comcast Xfinity) provided me a router modem (Arris TG862G) which I already set up in bridge mode, the firewall is still on, and my Asus 68U has also its own firewall on. Dial the number, extension or choose a contact from your call list or directory and press #. Most ISPS have blocked ports 80 & 443. Article | Comcast Business Support Block Page Customization This section provides the ability to customize the browser message received when a user attempts to access a website or page that is blocked by Comcast Business SecurityEdge. Mar 16, 2023 · Here are the ports that we specifically block: https://www. Does Xfinity (Comcast) block Port Scanning? Other than the Port Forward appearing correct in the Xfinity App how can I troubleshoot the connection? Are there other default Ports I can test for and how? I have the XB8 Gateway Feb 28, 2013 · I know port 80, 443 & 21 are blocked, however just you port forwarding and forward to something like port 8080 to connect to your web server. The "maximum security" firewall option sounds too paranoid and a pain in the ass, but the next option down, "medium security," sounds like no security. In many cases, port 80 connection will automatically redirect to 443 for some services, but some browsers (maybe all now?) tries 443 before 80, so this redirect/rewrite is not that much needed anymore from what I understand. Consequently, many Comcast/Xfinity users report Comcast dropping the VPN connection or blocking VPN ports. Well after Lets Encrypt started failing again, I ran a port scanner Cox Blocks Feb 24, 2015 · I have added the static port mappings for 1701 and 1723 to the internal IP Address, but I see no "protocol" options in the DPC3939B. P. . Follow our step-by-step guide to restrict access and protect your home network from unwanted traffic. Custom port # 1791 works fine, but 80 and 443 are closed despite the port forward. Anyone using Comcast and found a work around? Yes, I am sure it is Comcast, have turned off firewall while testing. Aug 22, 2013 · Comcast does not block port#5567 on the network and 5567 is not one of the Comcast internal gateway test ports. As of today, my web service (Vercel) is showing a 403 Forbidden error when it tries to access my service via a subdomain -> my public IP. Mar 18, 2023 · Blocked Internet Ports List Find out which ports are blocked by Comcast and why. After I moved, the port forwards I set up for ports 80 and 443 stopped working. To resolve this, configure your mail client to use port 567 instead. Note: In Indonesia, local regulations require us to block port 465 TCP. How can I determine what client is not secure You don't need to have static ips to use port 80/443 with AT&T. Feb 20, 2025 · Note: Network Engineers have verified that port 443 does not get blocked. Mar 16, 2020 · When I scan my public IP via yougetsignal. To check whether it's properly bridged, look on your Netgear router at the "WAN address". Ports on the internet are like virtual passageways where data can travel…. How does one tell the UI to stop using port 80 and start Feb 19, 2022 · Hello, @big-DHC. Therefore, based on the information available, it can be inferred that Port 80 is not blocked by Xfinity. Jun 13, 2022 · Turning off the Comcast gateway's firewall completely didn't fix the problem either. Block incoming : This means you can't run your own mail server 'in house I recently moved and am renting a Comcast modem/router until I can afford to order a modem and router. Ports 80 and 22 apparently blocked Hi - I have an XFi router. Jan 1, 2015 · In general, yes you'll want to have your COmcast gateway in "true bridge mode", which makes it act like a standard cable modem. In fact NMap doesn't even find a connection because the IP doesn't respond to pings. Sep 22, 2015 · Port configuration rules are used to block or redirect specific traffic passing through from one side of the Comcast Gateway to the other. I would like to uncheck the port forwarding box in the Comcast gateway to break this connection. Looking for help from folks familiar with the Comcast business modems currently being deployed for customers. So, I've given up on googling because I cant find help with this Firstly, let me say AND confirm right now The XFinity modem UI is blocking ports 80 and 443 NOT Xfinity themselves. On the Comcast gateway, port 80 is being forwarded to port 80 on our server. However, of the many dozens of ports forwarded over the years, two of them are blocked by Comcast. My modem is the Xfinity XB3. S. Comcast’s email system will support version 1. I have no problem accessing the server on ports 80 or 443 (http or https) from outside my LAN by my do Mar 14, 2022 · @ mike115 said in Is ISP blocking all ports?: WOW! block port 25 Why would you connect to 'some where' using port 25 ? Outgoing connections using port 25 work, but you have to use the (IP° mail server of your ISP. com for example or just try to connect to https://forums. Port Forwarding is one way to open some of the ports for One IP (computer). It's more bandwidth. com and NMap I get that all common ports are blocked including port 80 & 443. Related questions: Jul 15, 2023 · Comcast is the worst, by far, because they love playing games with these MITM shennanigans, or they randomly enable their "XFinity Security Suite" and block traffic (and have tried to charge us Oct 4, 2025 · ️ Does Xfinity/ Comcast block VPN? In the past, Comcast was infamously renowned for such practices that led to Xfinity not working with VPN. Thanks for taking some time to reach out to our community about the port forwarding. They will not forward. Can you help out? Thanks! I can't think of an ISP off hand that blocks these. Since many other people are using Wireguard on same internet provider, I don’t understand why only my wireguard was blocked, and what can I do to prevent this from happening in future? An ISP blocks ports 80/443 (and also 25/587/etc) centrally, not at every single individual gateway device on their network, in order to enforce policy but also to keep traffic they don't want on their subscriber network blocked long before it gets near you. Follow the steps below according to your user role. 254. You can post for technical support, advice, or just to vent about how you feel Comcast did you wrong. So I re-configured Lets Encrypt to use port 443 instead, as Cox says they do block port 80, put port 443 tcp inbound is clear. All information on the internet passes through ports to get to and from computers and servers. It's not Comcast. Do you have the Advanced Security option set up for your account? A subreddit primarily dedicated to asking questions and/or discussing experiences with Comcast. PS Advanced security is turned off Aug 23, 2020 · I set up port forwarding for access to systems on my lan from outside. The Customized Block Page will only display for HTTP websites, any HTTPS based websites will display a generic This page can't be displayed message. Mar 23, 2015 · Most of these intrusion attempts come in on port 80. There is a slight change in behaviour. Feb 12, 2021 · Just to see if there might be something blocking the connection over port 443, I removed the port forwarding entry for VPN/SSTP in the CBR-T router and replaced it with a NAT entry using the same external and internal IP addresses. I have forwarded ports 80 and 22 to a server on my local network. Heya there! I would like to host my own web server @ home, but apparently my ISP has blocked ports 80 and 443 for incoming… We would like to show you a description here but the site won’t allow us. As well, are you trying to forward port 500 to Apr 5, 2025 · Blocking or breaking Private Relay while allowing other VPNs could be a way to nudge users toward Comcast’s ecosystem without explicitly banning all privacy tools—an outright VPN ban would likely spark bigger backlash. When a certain port is known to cause vulnerability to the security and privacy of your information, Xfinity blocks it to protect you. Dec 26, 2023 · As far as I can tell Xfinity is blocking port forwarding. Oct 11, 2020 · To comply with someone for something we need to block the incoming ports 443 and 60443, just the incoming, if we block the outgoing nobody can access https I can get into the router (Comcast supplied business router, says "Technicolor" on it) but want to make sure I do it correctly. xfinity. Carrier Grade NAT is blocking my remote access to my device, is there any work around for this? I have my own equipment. Port 443 is not listed on the Blocked Port list. May 23, 2019 · Hello, Barry, thanks for taking the time to reach out to us over forums. If the numbers look something like "10. What kind of error do you see when trying to forward port 443 and 80? Jan 22, 2025 · I already checked and Comcast explicitly does not block 443 or 80. Maximum Security (High) LAN-to-WAN: Allow as per below. 80/443 is like dumped down internet access. I suspect Comcast is now blocking incoming traffic to port 443 for my public address, but I'm not sure. 1. I need the following ports open for the system to work: Ports needed to be opened: UDP 69 5060 9000 20000-31000 32768-38 Most ISPS have blocked ports 80 & 443. unchecked Block http (TCP port 80, 443) unchecked Block ICMP unchecked Block Multicast unchecked Block Peer-to-peer applications unchecked Block IDENT (port 113) checked Disable entire firewall IPv6 unchecked Disable Ping on WAN interface Custom LAN-to-WAN Oct 26, 2020 · May I know if the rule for blocking ports 80, 443 was applied for local ports or remote ports? When the connection was established, ports 80 and 443 refer to the port on the server (website) side. - Comcast gateway devices' IP networks are defaulted with Gateway Address 10. These days, it's 587 or better : port 465. I know this can cause an inconvenience but our aim is to provide the best possible service while protecting all of our customers the best that we can at the same time. 10", (or 10. Port forwardin Dec 18, 2023 · Use Azure File Sync as a QUIC endpoint: You can use Azure File Sync as a workaround to access Azure Files from clients that have port 445 blocked. Aug 15, 2023 · I am trying to port forward ports 80 and 443 and it is not working. 0. This article provides a Mar 29, 2023 · This tutorial explains how to configure a Comcast Business Class static IP address to enable remote access to network clients. Dec 24, 2004 · I believe everything is setup right, just think Comcast is blocking port 80/443 unless your a business subscriber. I then switched the port forward in my router to forward port 80 to 81 external instead and it worked! May 3, 2022 · When I go to the IP of my router on my xFi modem (10. Can I get some help with this? Jul 24, 2025 · Comcast routers allow you to connect to the internet using a cable or fiber optic connection. If you're talking about 465 to a remote system, that should not be blocked by us. That allows the malware direct access to the server. net. Hey I want to self-host my website, so I opened ports 443 + 80 on 10. I try to navigate to my ip and I get an invalid SSL certificate and the login page for my modem. Jul 2, 2025 · Comcast routers, officially known as Xfinity Gateways, are ubiquitous in residential and small business networks, providing essential connectivity services. 2 and discontinue the ability to connect through TLS 1. Thinking something might have changed, I restarted and ran some tests but nothing changed externally. Although Verizon does not allow in TOS for residential customers to run web servers, I have been for years on and off and never had an issue. Jul 24, 2022 · I have set up port forwarding for port 443 from Xfinity Gateway to my home server. Mar 11, 2017 · Comcast has started blocking just about all ports in our area. Aug 30, 2019 · I finally was able to dump Xfinity for Fiber through a small ISP. Nov 28, 2019 · After further research, I have discovered that port 25 and 110 are blocked and cannot be lifted. 80 votes, 96 comments. If your experience looks different than below, please sign in to My Account for more personalized support content. Verizon, Cox, and Comcast tend to allow SSL/TLS ports for IMAP/POP email along with FTP ports. Dec 3, 2023 · My firewall is configured in a way to allow 80, 443, and 8443 for the purposes of this test. Port 25 was used for sending mail, one or two decades ago. Learn how to block ports on your Xfinity router to enhance network security. I could not get 443 forwarded to 8123, despite successfully forwarding another service on a different port. It appears that 80 and 22 are being blocked by Comcast or by the router, but I can find no relevant settings to modify. comcast. For me, as soon as I chose a different port, the magic flowed, but calling Comcast out for lying feels like complaining about humidity during a rainstorm. Other ports forward successfully. Dec 13, 2022 · I'm able to forward ports 80 and 443 and can verify I can toggle the ports open/close. I have called technical support 17 times and have had two techs come to Hello, I see a list of ports that are blocked on Spectrums website, however I am unable to host ANY game servers on my home network. Press Transfer to complete the transfer. Feb 2, 2024 · Last night it was working great - traffic was coming in on port 443. I assume you have Comcast residental service, so yes this is pretty common. Thanks! Nov 9, 2024 · The list of blocked ports includes Port 0, 25, 67, 135-139, 161, 445, 520, 547, 1080, and 1900, but Port 80 is not listed as being blocked. The only port they really try to block is 25 for SMTP, and you can usually get a chat tech to get rid of that block for free. I've set up port forwards to access it from outside. I am trying to port forward ports 80 and 443 and it is not working. Finally openvpn over 443 was working, and I have been using. If my testing is accurate, Fidium blocks all incoming pings as well as incoming traffic on ports 22, 80, and 443. The only ones I have found open are 21 and 443 of the more common ones. 1 and lower. There are 65,535 available Nevertheless: It's cheaper. 8), I am able to get the expected result from forwarding. 50 (Server) through the app. 10. When the receiving party answers, announce the call. com/support/articles/list-of-blocked-ports. businesshelp. Id like to get a little database going of current ISP's and whether or not they block ports 80 and 443. This link shows how to set up the port forward in case you want to check your steps. 5900/5901 (or higher if you're using more sessions) are typically unblocked. I expect that 10. 8k3ysd upb1 m1o14y fyyq 0ro dt hdvi6 hhfp q05 tsc