# P21 Community v4.1.0 Unable to connect to internet **URL:** \ **Category:** Troubleshooting and Problems\ **Created:** [December 3, 2024, 4:01pm UTC](https://forum.certara.com/t/p21-community-v4-1-0-unable-to-connect-to-internet/2084 "2024-12-03T16:01:42Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Matt\_Myers](https://sea1.discourse-cdn.com/certara/user_avatar/forum.certara.com/matt_myers/32/2548_2.png) [@Matt\_Myers](https://forum.certara.com/u/Matt_Myers)\ **Post date:** [December 3, 2024, 6:20pm UTC](https://forum.certara.com/t/p21-community-v4-1-0-unable-to-connect-to-internet/2084/1 "2024-12-03T18:20:18Z")
Hi Mike, Emailing [Community@pinnacle21.com](mailto:Community@pinnacle21.com) is not restricted to active users. Emailing via your mailing system should deliver to us without issue. I will have our team follow up with you directly instead. Kind regards, Matt ---
**Author:** ![michael.kline](https://avatars.discourse-cdn.com/v4/letter/m/b5a626/32.png) [@michael.kline](https://forum.certara.com/u/michael.kline)\ **Post date:** [December 3, 2024, 6:46pm UTC](https://forum.certara.com/t/p21-community-v4-1-0-unable-to-connect-to-internet/2084/2 "2024-12-03T18:46:00Z")
Thanks Matt Being provided this list is somewhat urgent ---
**Author:** ![michael.kline](https://avatars.discourse-cdn.com/v4/letter/m/b5a626/32.png) [@michael.kline](https://forum.certara.com/u/michael.kline)\ **Post date:** [December 3, 2024, 4:01pm UTC](https://forum.certara.com/t/p21-community-v4-1-0-unable-to-connect-to-internet/2084/3 "2024-12-03T16:01:42Z")
Hi, Can I be provided the list of domains required to be whitelisted on our Firewall to allow the proper internet connection for P21 C v4.1.0? I have tried sending email to [Community@pinnacle21.com](mailto:Community@pinnacle21.com) and although a registered user on the site, it is not accepted. Thanks Mike