# Problem With Plex Certificate Web App **URL:** \ **Category:** General Discussions\ **Created:** [October 26, 2017, 3:28pm UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813 "2017-10-26T15:28:17Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![MoonWalker](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/moonwalker/32/19205_2.png) [@MoonWalker](https://forums.plex.tv/u/MoonWalker)\ **Post date:** [October 26, 2017, 3:28pm UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/1 "2017-10-26T15:28:17Z")
Every time I use the web app, I’m getting report something wrong with the certificate. I gave it time for Plex to renew the certificate, but that’s not happening after this long. I would really like to see this resolved. Thanks ---
**Author:** ![OttoKerner](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/ottokerner/32/10079_2.png) [@OttoKerner](https://forums.plex.tv/u/OttoKerner)\ **Post date:** [October 26, 2017, 4:01pm UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/2 "2017-10-26T16:01:34Z")
Please report the exact error message. Make a screenshot if possible. This usually only happens when there are other parties interfering, like corporate firewalls or anti virus software. ---
**Author:** ![MoonWalker](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/moonwalker/32/19205_2.png) [@MoonWalker](https://forums.plex.tv/u/MoonWalker)\ **Post date:** [October 26, 2017, 5:15pm UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/3 "2017-10-26T17:15:19Z")
Yes, it’s Kaspersky terminating it. When I get home, I’ll take a screenshot and write down the message as well. Thanks ---
**Author:** ![OttoKerner](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/ottokerner/32/10079_2.png) [@OttoKerner](https://forums.plex.tv/u/OttoKerner)\ **Post date:** [October 26, 2017, 5:22pm UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/4 "2017-10-26T17:22:29Z")
I am pretty confident that it is Kaspersky which is the reason for the failure in the first place. When Kaspersky is decrypting the secure communication between the Plex clients and the server, it does the following: 1. decrypt the packet 2. inspect the packet 3. re-ecrypt the packet - but this time using its own cyrptographic “intermediate” certificate. And that is making the data packet **invalid** , because the certificate and the domain name from where it is coming from don’t match anymore. Without Kaspersky’s interference, the packet would have a certificate that shows your Plex server’s fully qualified domain name. You must tell Kaspersky to not decrypt encrypted communication. ---
**Author:** ![OttoKerner](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/ottokerner/32/10079_2.png) [@OttoKerner](https://forums.plex.tv/u/OttoKerner)\ **Post date:** [October 26, 2017, 5:23pm UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/5 "2017-10-26T17:23:29Z")
I am pretty confident that it is Kaspersky which is the reason for the failure in the first place. When Kaspersky is decrypting the secure communication between the Plex clients and the server, it does the following: 1. decrypt the packet 2. inspect the packet 3. re-ecrypt the packet - but this time using its own cyrptographic “intermediate” certificate. And that is making the data packet **invalid** , because the certificate and the domain name from where it is coming from don’t match anymore. Without Kaspersky’s interference, the packet would have a certificate that shows your Plex server’s fully qualified domain name. You must tell Kaspersky to not decrypt encrypted communication. ---
**Author:** ![MoonWalker](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/moonwalker/32/19205_2.png) [@MoonWalker](https://forums.plex.tv/u/MoonWalker)\ **Post date:** [October 27, 2017, 4:09am UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/6 "2017-10-27T04:09:48Z")
![](https://sea1.discourse-cdn.com/plex/uploads/default/original/3X/c/f/cfc1cfbe489a359b1ef410f41d92aa28d4d49ba9.jpg) ![](https://sea1.discourse-cdn.com/plex/uploads/default/original/3X/d/0/d08d50871849e772cdfaede6c61a66790bf50e7d.jpg) **Certificate error Self-signed certificate** ---
**Author:** ![Kraevin](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/kraevin/32/96968_2.png) [@Kraevin](https://forums.plex.tv/u/Kraevin)\ **Post date:** [October 27, 2017, 6:43am UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/7 "2017-10-27T06:43:29Z")
> @OttoKerner said: > I am pretty confident that it is Kaspersky which is the reason for the failure in the first place. > > When Kaspersky is decrypting the secure communication between the Plex clients and the server, it does the following: > > 1. decrypt the packet > 2. inspect the packet > 3. re-ecrypt the packet - but this time using its own cyrptographic “intermediate” certificate. > And that is making the data packet **invalid** , because the certificate and the domain name from where it is coming from don’t match anymore. > > Without Kaspersky’s interference, the packet would have a certificate that shows your Plex server’s fully qualified domain name. > > You must tell Kaspersky to not decrypt encrypted communication. Spot on. It is Kaspersky. =) ---
**Author:** ![Coxeroni](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/coxeroni/32/21481_2.png) [@Coxeroni](https://forums.plex.tv/u/Coxeroni)\ **Post date:** [October 27, 2017, 6:51am UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/8 "2017-10-27T06:51:53Z")
I have a similar problem when connecting to my server directly ([https://server.url:32400](https://server.url:32400)): While Firefox/Win7 at work shows it trusts the certificate, Chromium/Linux says it’s not a secure connection. Who is right? 😃 ---
**Author:** ![Kraevin](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/kraevin/32/96968_2.png) [@Kraevin](https://forums.plex.tv/u/Kraevin)\ **Post date:** [October 27, 2017, 6:55am UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/9 "2017-10-27T06:55:45Z")
> @Coxeroni said: > I have a similar problem when connecting to my server directly ([https://server.url:32400](https://server.url:32400)): > While Firefox/Win7 at work shows it trusts the certificate, Chromium/Linux says it’s not a secure connection. > Who is right? 😃 Are you using Kaspersky? ---
**Author:** ![Coxeroni](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/coxeroni/32/21481_2.png) [@Coxeroni](https://forums.plex.tv/u/Coxeroni)\ **Post date:** [October 27, 2017, 7:36am UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/10 "2017-10-27T07:36:20Z")
Nope, so probably I wasn’t allowed to hijack the thread? 😉 ---
**Author:** ![OttoKerner](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/ottokerner/32/10079_2.png) [@OttoKerner](https://forums.plex.tv/u/OttoKerner)\ **Post date:** [October 27, 2017, 9:52am UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/11 "2017-10-27T09:52:08Z")
> @asaintfort said: > ![](https://sea1.discourse-cdn.com/plex/uploads/default/original/3X/d/0/d08d50871849e772cdfaede6c61a66790bf50e7d.jpg) Could you also show what’s on the ’ General’ and ‘Details’ tabs? ---
**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\ **Post date:** [January 8, 2020, 12:03am UTC](https://forums.plex.tv/t/problem-with-plex-certificate-web-app/211813/12 "2020-01-08T00:03:27Z")