# Configure OpenVidu + External COTURN in On-Premises Environment

**URL:** <https://openvidu.discourse.group/t/configure-openvidu-external-coturn-in-on-premises-environment/4746>\
**Category:** Issues with deployment\
**Tags:** v2\
**Created:** [August 10, 2023, 8:07am UTC](https://openvidu.discourse.group/t/configure-openvidu-external-coturn-in-on-premises-environment/4746 "2023-08-10T08:07:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![romil](https://avatars.discourse-cdn.com/v4/letter/r/a3d4f5/32.png) [@romil](https://openvidu.discourse.group/u/romil)\
**Post date:** [August 10, 2023, 8:07am UTC](https://openvidu.discourse.group/t/configure-openvidu-external-coturn-in-on-premises-environment/4746/1 "2023-08-10T08:07:27Z")

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Hello,  
Need help in configuring OpenVidu CE + OpenVidu External COTURN in on-premise

Openvidu external COTURN is installed in DMZ  
Openvidu server and KMS is on Internal server (behind DMZ)

We have all the required docker images on server. We are facing one minor issue in UDP connection due to which call is not completing. Need a help to analyze the TCP dump or evaluate the architecture and resole this NAT issue.

OpenVidu version 2.22.0  
OpenVidu external coturn version 4.2.6  
Thank you

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**Author:** ![cruizba](https://yyz2.discourse-cdn.com/free1/user_avatar/openvidu.discourse.group/cruizba/32/18_2.png) [@cruizba](https://openvidu.discourse.group/u/cruizba)\
**Post date:** [August 21, 2023, 2:30pm UTC](https://openvidu.discourse.group/t/configure-openvidu-external-coturn-in-on-premises-environment/4746/2 "2023-08-21T14:30:53Z")

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Please follow the instruciton over here: [Allow users behind firewalls - OpenVidu Docs](https://docs.openvidu.io/en/2.28.0/deployment/allow-users-behind-firewalls/)