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[GH-ISSUE #4155] SSL Unrecognized Name Alert #2694
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Originally created by @AmFerra on GitHub (Nov 12, 2024).
Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/4155
Checklist
Have you pulled and found the error with
jc21/nginx-proxy-manager:latestdocker image?Are you sure you're not using someone else's docker image?
Have you searched for similar issues (both open and closed)?
Describe the bug
accessing the website through cloudflare on HTTPS returns an ERR_SSL_UNRECOGNIZED_NAME_ALERT error. I am using the dns challenge
Nginx Proxy Manager Version
2.12.1
To Reproduce
Steps to reproduce the behavior:
Expected behavior
to see the default welcome wbepage
Screenshots
Operating System
TrueNAS
Additional context
latest truenas version, reinstalled, tried using the custom certificate, using port 8443 because 443 was acting wierd
@ruderthanyou commented on GitHub (Nov 13, 2024):
I'm using truenas 24.10.0.2 and NPM 2.12.1. I am also getting the same error when accessing internally from my network. No issues accessing from external, seems to always work.
One more note, from an android device running chrome I always will get ERR_SSL_UNRECOGNIZED_NAME_ALERT error. From Windows using Edge or Chrome I get ERR_QUIC_PROTOCOL_ERROR and if I disable QUIC then I get the SSL_UNREGCONIZED error. And as I mentioned, occasionally I get thru to the host without issue, but it doesn't last very long and breaks again.
Regards
@AmFerra commented on GitHub (Nov 13, 2024):
I am accessing it from the external network to get this error, i am using a custom certificate from cloudflare but it seems like that cant be applied to the website, but the DNS challenge ssl doesnt seem to work either
@ruderthanyou commented on GitHub (Nov 14, 2024):
I believe I figured out my issue. It seems related to DNS and some cname records that were not configured. Using unifi for DNS and they still don't support creating cname records. Anyway, switching to Adguard Home and creating the proper records seems to have solved my issue. Still testing, but looks good so far.
@Tagnard commented on GitHub (Nov 15, 2024):
+1
@AmFerra commented on GitHub (Nov 15, 2024):
it now says ssl handshake failed, I have no idea what I am doing and there is not a lot of documentation that I can find
@leogout commented on GitHub (Nov 17, 2024):
Hi, just resolved a similar problem two minutes ago. I had created a stream from the port 22 to a local port on my network. Strangely when I deactivated it everything fell into place and I no longer was having the SSL_ERROR_UNRECOGNIZED_NAME_ALERT. If @Ferrarisrex you need more info on my config @ me here and I'll create a ticket to tell the whole story and the steps to reproduce the error. If it is normal behavior feel free to ignore this message. I don't have a good enough understanding of networks to tell the difference...
@jjmmbb commented on GitHub (Nov 22, 2024):
Same issue here... When accessing SSL port direct or using Cloudflare Tunnel, same error.
@mrin commented on GitHub (Nov 25, 2024):
Same issue
@Recentiv commented on GitHub (Dec 5, 2024):
+1
@FedeAbella commented on GitHub (Dec 14, 2024):
Same issue here
@umutbesler commented on GitHub (Feb 3, 2025):
Same issue, any fix for this?
@doozybytes commented on GitHub (Feb 3, 2025):
For me the issue went away after I rebooted my nginx proxy container.
@moogfennec commented on GitHub (Mar 7, 2025):
Hi, I have the same problem here. Everything was working fine until it was not.
@mrxehmad commented on GitHub (Mar 8, 2025):
.
hi @ruderthanyou I am also facing this problem, if you got some fix can you let me know what should I do.
i am facing this issue since December last year 💔
@gunrunner20 commented on GitHub (May 9, 2025):
Same here.
I added another sub domain name to an existing proxied host, while the cert allows per wildcard for all subdomains (just internal setup).
the old entry still worked, the new one didn't.
After a reboot the new subdomain entry and another completely new entry for another host which didn't work before work now.
@TheOverpassArsonist commented on GitHub (Sep 25, 2025):
I'm getting this but I've noticed strangely the error doesn't occur when the computer is connecting to itself, only when something else tries to connect to it. I've tried rebooting the container, wiping it and retrying, etc. several times and nothing has seemed to work. I don't know what changed, (it was working before fine) but this is definitely still an issue and it's hitting my setup hard no matter what I try to do.
Editing to not spam with something that might be unnecessary - Anyone having this problem please react to this post with a party popper IF you are using Zerotier specifically for connections. I can't explain it, but for me the issue was specifically Zerotier and I'm not sure if it was just me having that issue, or if that's actually a significant number of people who are having this issue. If you are currently using zerotier, I'd suggest giving Netbird a look, as it seems to function as-expected. (and is significantly less fussy than Tailscale)
@digitaluc342587 commented on GitHub (Sep 29, 2025):
i have the same issue, seems te be intermittend after some time everything works fine once more. only appearse when connecting from a local lan. not when connting from wan.
@Bugi82 commented on GitHub (Nov 5, 2025):
+1
@titiviking commented on GitHub (Feb 19, 2026):
same for me... intermittent (but periods of working are short) so very hard to troubleshoot... nothing seems to fix it