xFi Advanced Security is blocking my company's website

Sorry to hear about your experiences, it looks like they've had this issue for some weeks. Only an issue with Comcast.  AT&T & Frontier are fine.

I don't know who their "security" vendor is, but looks like neither has escalated. I can't believe its about tech competence,  just poor response  so looking for workarounds like VPN. Sad to be trying to solve when they have so many techs . .

DNS propagation is fine for rest of world, you can check here

https://dnschecker.org/#A/

Also has tools like blacklisting, your domain ComicBookStore.com is clean.

Trying access through xfinity wifi,  turned it on but apparently takes time to come up, I've got a feeling the same junk is blocking that.  If I find anything will post.

Thanks for your comments XL9  - I checked all my domains and non are blacklisted.  I finally got Comcast to elevate my complaint to the next technicial level - will have to call this morning after 8AM.    Finally, got a representative to elevate me up the food chain.  Will let you know what they say.  Oh yea, one of the threads mentioned that they thought Plume handled the lists for xFi Advanced Security - got through to Plume and they said I would have to go through Comcast.  😞

UPDATE (6/1/2020):  Worked with (next level) Comcast Support from 8:03 to 8:52 AM.    Unfortunately, while I can't get to any of my sites - the representative (running through xFi Advanced Security also) could get to all my 5 sites!  He was at a loss why he could and I couldn't.  He said he would call me back after he checked into a few other possibilities.   Also, I got the impression that he wasn't aware of anyone else having the same problem - I pointed to just 2 of many threads for him to review - it wasn't just me.  So - still dead in the water with my websites.   He said he would call me back today - keeping my fingers crossed.

UPDATE (6/2/2020):  Still waiting for the "call back!"

@NFrankel236 @ComcastRachelH,

Guessing responding Comcast tech may be outside your network or US,  may not be able to replicate the block. Your hosting technician will not see a problem either, if they are not using Comcast.  Their blocking  rule doe not appear not consistent.

Also tested  with Browsec plug-in switching  to non Comcast NY server,  not blocked from there either.  I'll post any progress.

Actually, he was about 240 miles away.

Try command prompt as admin, will go to:

C:\Windows\system32>

 
type in :

tracert  yourdomain.com 

you can check where it's being blocked

https://kb.intermedia.net/article/682

UPDATE (6/1/2020):  Worked with (next level) Comcast Support from 8:03 to 8:52 AM.    Unfortunately, while I can't get to any of my sites - the representative (running through xFi Advanced Security also) could get to all my 5 sites!  He was at a loss why he could and I couldn't.  He said he would call me back after he checked into a few other possibilities.   Also, I got the impression that he wasn't aware of anyone else having the same problem - I pointed to just 2 of many threads for him to review - it wasn't just me.  So - still dead in the water with my websites.   He said he would call me back today - keeping my fingers crossed

UPDATE (6/2/2020):  Still waiting for the "call back!"

UPDATE (6/3/2020):  Still waiting for the "call back!"

UPDATE (6/4/2020):  Still waiting for the "call back!"  Getting a feeling that the 2nd Level Support Representative blew me off? 🙂

UPDATE (6/5/2020):  Still waiting for the "call back!"

UPDATE (6/6/2020):  Still waiting for the "call back!"

UPDATE (6/6/2020):  OMG - As of 5PM (or so) -  I am no longer blocked!  Yes, I am now living the dream!  FWIW - all my websites were blocked from May 29th, through June 6th, 2020.

UPDATE (6/7/2020):  Yuppa - BLOCKED AGAIN!

UPDATE (6/7/2020):  Yuppa - BLOCKED AGAIN!

Check your ip
https://www.wikihow.com/Check-a-Computer-IP-Address

Check if your ip is blacklisted by anyone
https://whatismyipaddress.com/blacklist-check

I found this had been an issue,

Thanks - my IP doesn't show up on any blacklist.  I also got the IP address for my biggest site (on the air for 24 years without a problem and being blocked) and it showed all blacklists site checks as GOOD.

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@XL9 wrote:

Check your ip
https://www.wikihow.com/Check-a-Computer-IP-Address

 

 

FWIW, if one is behind a router, that method will only show one's LAN / private IP address. Not one's WAN / public IP. You would need the computer to be directly connected to a straight cable modem.

 

Sites like this will;

 

https://www.whatismyip.com/

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This is happening to us as well.

Advances security flagged our site and now we cant get it.

Tried disabling "advanced security" but still can't get it

I have been on support for 4+ hours, getting tossed to many different people who cant help

absolutely horrible service