[GH-ISSUE #5684] Problem with reverse proxy - ERROR 502 #10924

New Issue

saavagebueno · 2026-08-05T01:27:44-04:00

saavagebueno commented

2026-08-05 01:27:44 -04:00

Originally created by @VPjoon on GitHub (Mar 24, 2026).
Original GitHub issue: https://github.com/netbirdio/netbird/issues/5684

I am using the self-hosted version and I am experiencing ERROR 502.

I have set my CNAME's for the domain name as recommended in the setup.... this is what I have set for my name servers:

netbird.main-domain.com ---> A Record ---> Server's IP Address
*.netbird.main-domain.com ---> CNAME ---> netbird.domain.com
custom-domain.com --> A Record ---> Server IP
*.custom-domain.com --> CNAME --> netbird.main-domain.com

The SSL Certificate has been issued correctly, but when I add a custom domain for a peer, for example for Synology, I get the follwing page:

When I use the internal Netbird IP address of my Synology, it works correctly, only it has an invalid SSL cert.

I am a bit lost... I would appreciate your help.

Originally created by @VPjoon on GitHub (Mar 24, 2026). Original GitHub issue: https://github.com/netbirdio/netbird/issues/5684 I am using the self-hosted version and I am experiencing ERROR 502. I have set my CNAME's for the domain name as recommended in the setup.... this is what I have set for my name servers: netbird.main-domain.com ---> A Record ---> Server's IP Address *.netbird.main-domain.com ---> CNAME ---> netbird.domain.com custom-domain.com --> A Record ---> Server IP *.custom-domain.com --> CNAME --> netbird.main-domain.com The SSL Certificate has been issued correctly, but when I add a custom domain for a peer, for example for Synology, I get the follwing page: <img width="1324" height="688" alt="Image" src="https://github.com/user-attachments/assets/d7cd8828-09ff-4f58-acf4-81ef642d084f" /> When I use the internal Netbird IP address of my Synology, it works correctly, only it has an invalid SSL cert. I am a bit lost... I would appreciate your help.

saavagebueno commented

2026-08-05 01:27:44 -04:00

@VPjoon commented on GitHub (Mar 26, 2026):

any help would be appreciated!

@VPjoon commented on GitHub (Mar 26, 2026): any help would be appreciated!

saavagebueno commented

2026-08-05 01:27:44 -04:00

@GEAR-IT-UP commented on GitHub (Mar 28, 2026):

Though ive just started using this, I actually suspect the issue what got me. orginally i added my docker container for a service and it gave the 100.x.x.x address inside the netbird tunnel (not its actually address 192.168.0.x. So instead of pointing at a peer, create a network, for your local lan (i think ur NAS? even as a range), then point toward that. it fixed it for me (hope it helps)!

@GEAR-IT-UP commented on GitHub (Mar 28, 2026): Though ive just started using this, I actually suspect the issue what got me. orginally i added my docker container for a service and it gave the 100.x.x.x address inside the netbird tunnel (not its actually address 192.168.0.x. So instead of pointing at a peer, create a network, for your local lan (i think ur NAS? even as a range), then point toward that. it fixed it for me (hope it helps)!

saavagebueno commented

2026-08-05 01:27:44 -04:00

@NDebx commented on GitHub (Apr 9, 2026):

I just did an upgrade and it was fixed for me @VPjoon :)

@NDebx commented on GitHub (Apr 9, 2026): I just did an upgrade and it was fixed for me @VPjoon :)

saavagebueno commented

2026-08-05 01:27:44 -04:00

@securityopa commented on GitHub (Apr 10, 2026):

@NDebx
Thanks for the reply.

Updating to 67.4 fixed the issue for me. But then when I updated my management to 68.1, it broke it again ... I am not sure if you are experiencing the same...

@securityopa commented on GitHub (Apr 10, 2026): @NDebx Thanks for the reply. Updating to 67.4 fixed the issue for me. But then when I updated my management to 68.1, it broke it again ... I am not sure if you are experiencing the same...

saavagebueno commented

2026-08-05 01:27:44 -04:00

@NDebx commented on GitHub (Apr 10, 2026):

@securityopa <3

I updated everything at once. Just by pulling all the docker images and then recreate.

docker compose pull

docker compose up -d

@NDebx commented on GitHub (Apr 10, 2026): @securityopa <3 I updated everything at once. Just by pulling all the docker images and then recreate. ` docker compose pull ` ` docker compose up -d `

saavagebueno commented

2026-08-05 01:27:44 -04:00

@Bajahaw commented on GitHub (May 1, 2026):

this is still happening in v0.70.4, without any interaction from my side, all services (including TCP) are down, restarting does not solve the issue

@Bajahaw commented on GitHub (May 1, 2026): this is still happening in v0.70.4, without any interaction from my side, all services (including TCP) are down, restarting does not solve the issue

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Reference: DYNR/netbird#10924