VPN blocked on Comcast and Xfinity [Solved]

Aleksandar Ognjanovic
by Aleksandar Ognjanovic
Troubleshooting Expert
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  • Comcast routers can be quite picky when it comes to VPN protocols and Xfinity blocking VPN traffic is not really a secret.
  • Get your VPN to work with Comcast again with the help of our fixes listed below.
  • Check out more handy fixes to common VPN issues in our VPN Errors & Solutions page.
  • Don't stop there! Explore all the useful tips and tricks covering this industry in our VPN Guides Hub.
VPN blocked on Comcast and Xfinity

The Net Neutrality repeal and history of issues with monopolized broadband market in the United States kind of made a good reason for users to turn to VPN solutions.

Comcast is one of those providers (AT&T and some local providers) who is frequently criticized for geo-restrictions and throttling the internet speed when users try to use Peer-2-Peer services.

However, even though a VPN tool should help you avoid possible obstacles just fine, we need it to work in order to do so.

And, seemingly, some Comcast routers don’t support PPTP protocol, which is a commonly used (less encryption, but less latency and faster bandwidth) VPN encryption protocol. Hence, VPN traffic being blocked by Comcast is rather common.

In order to address this, we prepared some equally common solutions, both recommended by Comcast’s support and knowledgeable users around the web.

If you’re unable to run VPN with the Comcast equipment or facing VPN access blocked in Comcast network, make sure to check the steps we provided below.

How to fix VPN issues with Comcast?

  1. Make sure you’re using proper VPN
  2. Update router’s firmware
  3. Change the protocol, change VPN encryption and switch servers

1. Make sure you’re using proper VPN

This is quite important. As we already said on various occasions, choosing a proper VPN solution that suits your needs isn’t exactly a walk in the park.

Especially, when we take into consideration the fact that all valid solutions are mostly premium. Of course, if you only need to hide your IP address once in a while, going on a spending spree isn’t recommended.

On the other hand, if you want a permanent solution to avoid bandwidth throttling, privacy infringement, and geo-restrictions, you’ll need to invest some funds in a monthly subscription.

Install Private Internet Access

Private Internet Access

Going premium does not come free, but it does not necessarily mean you will have to break the bank. If anything, PIA is a world-leading VPN that provides most affordable subscription plans, plus a 30-day money-back guarantee which allows you to test their services risk-free.

Comcast-wise, this best-in-class VPN solution is your best bet as it can overcome ISP blockages, allow you to access all geo-restricted content you need, and it does so without latencies and data limitations.

Boasting ultra-fast download speeds, unlimited bandwidth, and an impressive network of 3292+ servers with global coverage, PIA is perfectly optimized for streaming, torrenting, and P2P sharing.

Unblock one website after another, regardless of your physical location, eliminate online censorship and enjoy a smooth, buffering-free Comcast experience while keeping your identity private, your browsing anonymous, and your data protected with the highest level of encryption, courtesy of PIA.

Private Internet Access

Private Internet Access

Comcast might not encourage P2P, but PIA is all about sharing! Enjoy unlimited streaming and torrenting with PIA!
$2.85/mo. Buy it now

2. Update router’s firmware

As the official source confirmed, a certain router model (Technicolor Wireless Gateway for XFINITY Internet Service) have had issues with PPTP security protocol. The problem is, allegedly, resolved by updating your router’s firmware.

We can’t say with certainty that this indeed was dealt with, as there’s no abundance of users’ feedback. However, it’s worth a try and, hopefully, after you update your router’s firmware, the VPN solution should work as intended.

On the other hand, Xfinity blocking VPN traffic is a known matter and if you were wondering how to update the firmware on the Comcast XFINITY router, this is automatically done after restarting your devices.

Just wait for some time until upgrades are installed and try connecting via VPN tunnel again.

Also, if by chance, you have your own router, you can use it to bridge the connection, avoiding the possible evasive measures. Any third-party router would work, and the only thing you should do is enabling the Bridge mode in XFINITY router’s settings.

In the address bar, type your IP address (Comcast changed private internet subnet to 10.x.x.x from 192.x.x.x), and log in with your credentials. Under the Gateway > At a Glance, enable Bridge mode.

3. Change the protocol, change VPN encryption and switch servers

There are two protocol suits which are covering the same thing in a different manner. TCP (Transmission Control Protocol) is a standard network and internet communication protocol and there’s also UDP (User Datagram Protocol), a more app-oriented and faster protocol.

A lot of users who were using the latter have had issues with Comcast router blocking VPN. Therefore, even though it’s seemingly slower, TCP should be your communication protocol of choice. You can configure it in the router settings.

Besides that, we recommend changing two-variable options in the VPN itself. Firstly, we recommend changing your encryption protocol to OpenVPN or L2TP/IPsec instead of PPTP. That should be an easy task to perform, as most VPN solutions offer a variety of alternative encryption protocols.

Have in mind that the encryption level is reversely proportional to speeds. Basically: the better the encryption, the slower the bandwidth. OpenVPN is in the middle, with both formidable encryption levels and average latency.

Finally, we recommend switching to an alternative server or location or IP address. Namely, even though we’re addressing the Comcast blocking VPN issue, there’s still the chance that your current server is overcrowded or unstable.

Give an alternative a try, and look for improvements.


That’s a wrap-up. In case you have any questions or suggestions on how to resolve the issues with VPN on Comcast, feel free to tell us in the comments section below.

FAQ: Learn more about Comcast/Xfinity and VPNs

  • Can Xfinity know if I’m using a VPN?

Xfinity (Comcast) can indeed get a hold of your online activity through data provided via your ISP modem, for example. This is why it is important to choose a VPN that bypasses ISP throttling, and most importantly, one that does not store any records (logs) such as PIA VPN.

  • Which VPN works with Xfinity?

There are several options that work well with Xfinity routers (among others) such as PIA or CyberGhost VPN both owned by Kape Technologies as well as ExpressVPN or NordVPN.

  • Does Comcast block VPN?

In the past, Comcast was actually infamously renowned for such practices. Nevertheless, their policies have changed lately and you can officially use VPNs with Comcast routers by enabling the Bridge mode in XFINITY router’s settings.

Editor’s Note: This post was originally published in March 2018 and has been since revamped and updated in May 2020 for freshness, accuracy, and comprehensiveness.

Editor's Note: This article was originally published in March 2018 and was revamped and updated in September 2020 for freshness, accuracy, and comprehensiveness.
  • Hello Aleksandar, thank you for your article. I have Nord vpn and it doesn’t work with xfinity, as far as watching sports in blacked out areas. Would PrivateInternetAccess be able to show sports (on Xfinity/Comcast)? Thank you for your time.
    Mark