tls-alpn-01 - urn:ietf:params:acme:error:unauthorized Status 403 #397

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adam · 2025-12-29T01:24:25+01:00

adam commented

2025-12-29 01:24:25 +01:00

Originally created by @tootai on GitHub (Jan 18, 2019).

Hello,
I receive following error using tls-alpn-01:
[...]

Generating ALPN certificate and key for ...
1 pending challenge(s)
Deploying challenge tokens...
Responding to challenge for authorization...
Cleaning challenge tokens...
Challenge validation has failed :(
ERROR: Challenge is invalid! (returned: invalid) (result: {
"type": "tls-alpn-01",
"status": "invalid",
"error": {
"type": "urn:ietf:params:acme:error:unauthorized",
"detail": "Cannot negotiate ALPN protocol "acme-tls/1" for tls-alpn-01 challenge",
"status": 403
},
"url": "https://acme-v02.api.letsencrypt.org/acme/challenge/wVQElJRFux4QSGXX6sqB37wOG9BXWFVffc1Hcgejx3U/11594171888",
"token": "Wkw6buVxdR3bd41jyeNGUjdG-crPgAG4PltzC9Bq1PU",
"validationRecord": [
{
"hostname": "",
"port": "443",
"addressesResolved": [
"ipv4 address",
"ipv6 address"
],
"addressUsed": "ipv6 address"
}
]
})

Thanks for any hint.

Daniel

Originally created by @tootai on GitHub (Jan 18, 2019). Hello, I receive following error using tls-alpn-01: [...] + Generating ALPN certificate and key for <myhostname>... + 1 pending challenge(s) + Deploying challenge tokens... + Responding to challenge for <myhostname> authorization... + Cleaning challenge tokens... + Challenge validation has failed :( ERROR: Challenge is invalid! (returned: invalid) (result: { "type": "tls-alpn-01", "status": "invalid", "error": { "type": "urn:ietf:params:acme:error:unauthorized", "detail": "Cannot negotiate ALPN protocol \"acme-tls/1\" for tls-alpn-01 challenge", "status": 403 }, "url": "https://acme-v02.api.letsencrypt.org/acme/challenge/wVQElJRFux4QSGXX6sqB37wOG9BXWFVffc1Hcgejx3U/11594171888", "token": "Wkw6buVxdR3bd41jyeNGUjdG-crPgAG4PltzC9Bq1PU", "validationRecord": [ { "hostname": "<myhostname>", "port": "443", "addressesResolved": [ "ipv4 address", "ipv6 address" ], "addressUsed": "ipv6 address" } ] }) Thanks for any hint. Daniel

adam closed this issue

2025-12-29 01:24:25 +01:00

adam commented

2025-12-29 01:24:26 +01:00

@lukas2511 commented on GitHub (Jan 18, 2019):

Well, it seems like you didn't configure tls-alpn at all, your webserver doesn't handle that protocol, so it doesn't work.

@lukas2511 commented on GitHub (Jan 18, 2019): Well, it seems like you didn't configure tls-alpn at all, your webserver doesn't handle that protocol, so it doesn't work.

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Reference: starred/dehydrated#397