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Change in DNS servers - problem resolved

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Change in DNS servers - problem resolved

Yesterday, whenever I tried to load any page from the Internet, I was confronted with browser warnings that it received a certificate that it did no trust.

 

This certificate was issued from register.be.xfinity.com. No matter where I went with SSL, I encountered this. I checked my firewall settings and found that as a DHCP client it received new DNS servers:

 

162.150.8.51 -> susilanding-chic-vip.sys.comcast.net

162.150.21.51 -> susilanding-denv-vip.sys.comcast.net

 

I've always previously received

 

75.75.75.75 -> cdns01.comcast.net

75.75.76.76 -> cdns02.comcast.net

 

I changed back to the 75s locally on my firewall and resolved my problem

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Re: Change in DNS servers - problem resolved

 

I had this exact same problem and I am so glad I found your message after working with support for 8+ hours and scavaging the interwebs. Thank You! I have no idea how that DNS entry was added. 

 

Just to add context to this issue for future people who search for this issue, the SSL popup I was getting on my computers and mobile devices was:

Cannot Verify Server Identity
The identity of "outlook.office365.com" cannot be verified

 

The details of the SSL cert were as OP stated: register.be.xfinity.com

Removing the 162.150.8.51 DNS entry solved the issue. 

 

 

 

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