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The Basics
- Nextcloud Server version (e.g., 29.x.x):
AIO 10.15.0
- Operating system and version (e.g., Ubuntu 24.04):
Windows 11
- Web server and version (e.g, Apache 2.4.25):
replace me
- Reverse proxy and version _(e.g. nginx 1.27.2)
caddy ? inbuilt in AIO
- PHP version (e.g, 8.3):
8.4
- Is this the first time you’ve seen this error? (Yes / No):
yes
- When did this problem seem to first start?
7 June
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
AIO
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
Yes - Tailscale
Summary of the issue you are facing:
[…]
I did a fresh install of NextCloud AIO and all the containers came up on docker
My dashboard shows it is ok to open NC
I am trying to access this app over tailscale on other devices
But when i open NC link https://xxxxx.tailxxxxx.ts.net/
it gives 400 error Client sent an HTTP request to an HTTPS server.
Been stuck for 2 days. Below are the apache logs
Steps to replicate it (hint: details matter!):
Log entries
Connection to nextcloud-aio-nextcloud (172.18.0.12) 9000 port [tcp/*] succeeded!
[Sun Jun 08 10:20:03.459700 2025] [mpm_event:notice] [pid 118:tid 118] AH00489: Apache/2.4.63 (Unix) configured -- resuming normal operations
[Sun Jun 08 10:20:03.459755 2025] [core:notice] [pid 118:tid 118] AH00094: Command line: '/usr/local/apache2/bin/httpd -D FOREGROUND'
{"level":"info","ts":1749378003.4769025,"msg":"maxprocs: Leaving GOMAXPROCS=20: CPU quota undefined"}
{"level":"info","ts":1749378003.4770412,"msg":"GOMEMLIMIT is updated","package":"github.com/KimMachineGun/automemlimit/memlimit","GOMEMLIMIT":30183104102,"previous":9223372036854775807}
{"level":"info","ts":1749378003.4770648,"msg":"using config from file","file":"/tmp/Caddyfile"}
{"level":"info","ts":1749378003.4781382,"msg":"adapted config to JSON","adapter":"caddyfile"}
{"level":"info","ts":1749378003.48137,"msg":"failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 7168 kiB, got: 416 kiB). See [https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes](https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes) for details."}
{"level":"info","ts":1749378003.4818106,"msg":"serving initial configuration"}
{"level":"error","ts":1749378007.662786,"msg":"challenge failed","identifier":"desktop-d40rm9m.tail0c4725.ts.net","challenge_type":"tls-alpn-01","problem":{"type":"urn:ietf:params:acme:error:dns","title":"","detail":"DNS problem: NXDOMAIN looking up A for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain","instance":"","subproblems":null},"stacktrace":"github.com/mholt/acmez/v3.(*Client).pollAuthorization\n\tgithub.com/mholt/acmez/v3@v3.1.2/client.go:557\ngithub.com/mholt/acmez/v3.(*Client).solveChallenges\n\tgithub.com/mholt/acmez/v3@v3.1.2/client.go:378\ngithub.com/mholt/acmez/v3.(*Client).ObtainCertificate\n\tgithub.com/mholt/acmez/v3@v3.1.2/client.go:136\ngithub.com/caddyserver/certmagic.(*ACMEIssuer).doIssue\n\tgithub.com/caddyserver/certmagic@v0.23.0/acmeissuer.go:489\ngithub.com/caddyserver/certmagic.(*ACMEIssuer).Issue\n\tgithub.com/caddyserver/certmagic@v0.23.0/acmeissuer.go:382\ngithub.com/caddyserver/caddy/v2/modules/caddytls.(*ACMEIssuer).Issue\n\tgithub.com/caddyserver/caddy/v2@v2.10.0/modules/caddytls/acmeissuer.go:288\ngithub.com/caddyserver/certmagic.(*Config).obtainCert.func2\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:626\ngithub.com/caddyserver/certmagic.doWithRetry\n\tgithub.com/caddyserver/certmagic@v0.23.0/async.go:104\ngithub.com/caddyserver/certmagic.(*Config).obtainCert\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:700\ngithub.com/caddyserver/certmagic.(*Config).ObtainCertAsync\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:505\ngithub.com/caddyserver/certmagic.(*Config).manageOne.func1\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:415\ngithub.com/caddyserver/certmagic.(*jobManager).worker\n\tgithub.com/caddyserver/certmagic@v0.23.0/async.go:73"}
{"level":"error","ts":1749378007.6628714,"msg":"validating authorization","identifier":"desktop-d40rm9m.tail0c4725.ts.net","problem":{"type":"urn:ietf:params:acme:error:dns","title":"","detail":"DNS problem: NXDOMAIN looking up A for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain","instance":"","subproblems":null},"order":"https://acme-v02.api.letsencrypt.org/acme/order/2451470842/392556194642","attempt":1,"max_attempts":3,"stacktrace":"github.com/mholt/acmez/v3.(*Client).ObtainCertificate\n\tgithub.com/mholt/acmez/v3@v3.1.2/client.go:152\ngithub.com/caddyserver/certmagic.(*ACMEIssuer).doIssue\n\tgithub.com/caddyserver/certmagic@v0.23.0/acmeissuer.go:489\ngithub.com/caddyserver/certmagic.(*ACMEIssuer).Issue\n\tgithub.com/caddyserver/certmagic@v0.23.0/acmeissuer.go:382\ngithub.com/caddyserver/caddy/v2/modules/caddytls.(*ACMEIssuer).Issue\n\tgithub.com/caddyserver/caddy/v2@v2.10.0/modules/caddytls/acmeissuer.go:288\ngithub.com/caddyserver/certmagic.(*Config).obtainCert.func2\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:626\ngithub.com/caddyserver/certmagic.doWithRetry\n\tgithub.com/caddyserver/certmagic@v0.23.0/async.go:104\ngithub.com/caddyserver/certmagic.(*Config).obtainCert\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:700\ngithub.com/caddyserver/certmagic.(*Config).ObtainCertAsync\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:505\ngithub.com/caddyserver/certmagic.(*Config).manageOne.func1\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:415\ngithub.com/caddyserver/certmagic.(*jobManager).worker\n\tgithub.com/caddyserver/certmagic@v0.23.0/async.go:73"}
{"level":"error","ts":1749378007.6628978,"logger":"tls.obtain","msg":"could not get certificate from issuer","identifier":"desktop-d40rm9m.tail0c4725.ts.net","issuer":"acme-v02.api.letsencrypt.org-directory","error":"HTTP 400 urn:ietf:params:acme:error:dns - DNS problem: NXDOMAIN looking up A for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain"}
{"level":"error","ts":1749378007.6629162,"logger":"tls.obtain","msg":"will retry","error":"[desktop-d40rm9m.tail0c4725.ts.net] Obtain: [desktop-d40rm9m.tail0c4725.ts.net] solving challenge: desktop-d40rm9m.tail0c4725.ts.net: [desktop-d40rm9m.tail0c4725.ts.net] authorization failed: HTTP 400 urn:ietf:params:acme:error:dns - DNS problem: NXDOMAIN looking up A for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain (ca=https://acme-v02.api.letsencrypt.org/directory)","attempt":1,"retrying_in":60,"elapsed":4.149707786,"max_duration":2592000}
{"level":"error","ts":1749378071.1218762,"msg":"challenge failed","identifier":"desktop-d40rm9m.tail0c4725.ts.net","challenge_type":"tls-alpn-01","problem":{"type":"urn:ietf:params:acme:error:dns","title":"","detail":"DNS problem: NXDOMAIN looking up A for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain","instance":"","subproblems":null},"stacktrace":"github.com/mholt/acmez/v3.(*Client).pollAuthorization\n\tgithub.com/mholt/acmez/v3@v3.1.2/client.go:557\ngithub.com/mholt/acmez/v3.(*Client).solveChallenges\n\tgithub.com/mholt/acmez/v3@v3.1.2/client.go:378\ngithub.com/mholt/acmez/v3.(*Client).ObtainCertificate\n\tgithub.com/mholt/acmez/v3@v3.1.2/client.go:136\ngithub.com/caddyserver/certmagic.(*ACMEIssuer).doIssue\n\tgithub.com/caddyserver/certmagic@v0.23.0/acmeissuer.go:489\ngithub.com/caddyserver/certmagic.(*ACMEIssuer).Issue\n\tgithub.com/caddyserver/certmagic@v0.23.0/acmeissuer.go:382\ngithub.com/caddyserver/caddy/v2/modules/caddytls.(*ACMEIssuer).Issue\n\tgithub.com/caddyserver/caddy/v2@v2.10.0/modules/caddytls/acmeissuer.go:288\ngithub.com/caddyserver/certmagic.(*Config).obtainCert.func2\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:626\ngithub.com/caddyserver/certmagic.doWithRetry\n\tgithub.com/caddyserver/certmagic@v0.23.0/async.go:104\ngithub.com/caddyserver/certmagic.(*Config).obtainCert\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:700\ngithub.com/caddyserver/certmagic.(*Config).ObtainCertAsync\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:505\ngithub.com/caddyserver/certmagic.(*Config).manageOne.func1\n\tgithub.com/caddyserver/certmagic@v0.23.0/config.go:415\ngithub.com/caddyserver/certmagic.(*jobManager).worker\n\tgithub.com/caddyserver/certmagic@v0.23.0/async.go:73"}
{"level":"error","ts":1749378071.122061,"msg":"validating authorization","identifier":"desktop-d40rm9m.tail0c4725.ts.net","problem":{"type":"urn:ietf:params:acme:error:dns","title":"","detail":"DNS problem: NXDOMAIN looking up A for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain; DNS problem: NXDOMAIN looking up AAAA for desktop-d40rm9m.tail0c4725.ts.net - check that a DNS record exists for this domain","instance":"","subproblems":null},"order":"https://acme-staging-v02.api.letsencrypt.org/acme/order/204621914/25195376854","attempt":1,"max_attempts":3,"stacktrace":"github.com/mholt/acmez/v3.
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
PASTE HERE
Web Browser
If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
PASTE
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
PASTE HERE
Apps
The output of occ app:list (if possible).
Tips for increasing the likelihood of a response
- Use the
preformatted textformatting option in the editor for all log entries and configuration output. - If screenshots are useful, feel free to include them.
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