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user_76543
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Friday, October 11th, 2024 12:53 AM

VPN issues - disconnecting

I keeping having issues where my work VPN disconnects about once every hour or more.  It's unpredictable.  Running a ping test on 8.8.8 shows a delay or disconnect that correlates with the VPN disconnect.  My work IT insists it's my Internet service.  Xfinity sent out a tech who re-ran a wire, but it is still happening.  I e had same service for 5+ years and this issue only started a few weeks ago.  Help!!!

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18 days ago

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user_dd7863

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19 Messages

3 months ago

I wouldn't bother trying to get Xfinitys help. Their XB8 Modem has been nothing but, a giant headache for me. From VPNs disconnecting constantly to slow wifi speeds. If you split the wifi bands you might have a more stable connection when it comes to vpns but, it's a roll of the dice.

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XfinityKrista

Official Employee

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1.5K Messages

Hello @user_dd7863, thank you for taking the time to reach out on social media.  I understand your concern with the connection, and I'd like the opportunity to check into that for you.

 

To access your account, will you please send us a direct message with your full name and complete service address.

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2 months ago

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XfinityThomasA

Official Employee

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1.9K Messages

2 months ago

Hi there! Thank you for reaching out and joining the Xfinity Forums community, user_76543. I see you've sent us a peer-to-peer chat, and we can continue there.

- XfinityThomasA

 

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user_6c1818

Visitor

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6 Messages

19 days ago

my work VPN uses Check Point Security VPN, and will only be connected 30-38 seconds then disconnects. I tested with another provider and no issues. How we can fix this? my modem is Xfinity XB7, Help!

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user_6c1818

Visitor

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6 Messages

19 days ago

I finally fixed my VPN problem, but is temp fix. I followed some of the suggestions to install a wifi router and configure my DNS to 1.1.1.1 and DNS-2 to 1.0.0.1 from Cloudfare https://developers.cloudflare.com/1.1.1.1/setup/windows/ . I had to buy an used TP-link router from Goodwill for 8 bucks and hooked up to my XB7 modem, I did not have to bridge my modem or anything. I connected my work computer to this TP link Wifi router and my VPN stays connected just fine now. Xfinity will have to come up with a real solution for this type issues or will loose customers. I almost change providers. I would suggest Xfinity to allow us to change the DNS on those rental modems if we want use a different DNS. 

(edited)

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EG

Expert

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107.6K Messages

18 days ago

@user_6c1818 

As a FWIW, if you are hanging a stand-alone / separate router off of the gateway device, and the gateway is not in *bridge mode*, you are cascading 2 routing devices which will result in an undesirable "double NAT" condition on your home network. 
 
Google "double NAT" for info about its potential pitfalls. It may break some applications.

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user_6c1818

Visitor

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6 Messages

The problem with this, is that hosts connected to the Daisy Chained router could forward packets to the Internet, but it can have difficulty sending packets to hosts connected to the Edge Router. Also, since your packet has to go through NAT multiple times, this affects network performance both locally and when surfing the Internet (since the router has to deencapsulate/reencapsulate the packet and change the source and dest. IP).

A solution to this, would be to disable Router functions on the Daisy Chained Router, so this device can act solely as a switch and an AP. I also advise for you to disable DHCP on the Daisy Chained Router, as it is bad to have 2 DHCP server in the network. If you cannot disable router functions, another solution would be to enable Bridge mode. Router Mode and Bridge Mode SHOULD be a setting on a Router's GUI. If you do not find them, then you are out of luck. Also, make sure your router is NOT assigned a Public IP Address.

If you want to understand Double NAT better, I suggest you look up how NAT (Network Address Translation) works.

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18 days ago

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user_6c1818

Visitor

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6 Messages

IF I notice poor internet performance, THEN, I'll have to switch to "bridge" mode, which I don't want to. but..we'll see. still, xfinity pls allow us to change DNS.

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18 days ago

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EG

Expert

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107.6K Messages

@user_6c1818​

A solution to this, would be to disable Router functions on the Daisy Chained Router, so this device can act solely as a switch and an AP.

If the daisy chained router is taken out of router mode, can it still be used to enter alternate DNS server addresses into its networking settings ???

I am not a Comcast Employee.
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We ask that you post publicly so people with similar questions may benefit from the conversation.

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18 days ago

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