Strange problem renewing, claiming firewall issue

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1

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My domain is:
camera.ttsh.dk

I ran this command:
certbot renew

It produced this output:
Domain: camera.ttsh.dk
Type: connection
Detail: 46.32.37.185: Fetching
http://camera.ttsh.dk/.well-known/acme-challenge/PJqcO39KaG5AQNGnwpaip3tyLq3q_-RHu4Wz1SeihoM:
Timeout during connect (likely firewall problem)

My web server is (include version):
apache 2.4.56

The operating system my web server runs on is (include version):
Raspbian GNU/Linux 11 (bullseye)

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know):
yes

I'm using a control panel to manage my site (no, or provide the name and version of the control panel):
no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):
certbot 1.12.0

Additional data :
on target:
$ echo hi > .well-known/acme-challenge/b

executed from microsoft azure
$ curl http://vejen-karate.dk/.well-known/acme-challenge/b
hi
executed from local - loopback
$ curl http://vejen-karate.dk/.well-known/acme-challenge/b
hi

Certbot reports
Domain: camera.ttsh.dk
Type: connection
Detail: 46.32.37.185: Fetching
http://camera.ttsh.dk/.well-known/acme-challenge/PJqcO39KaG5AQNGnwpaip3tyLq3q_-RHu4Wz1SeihoM:
Timeout during connect (likely firewall problem)

Does nto seem to be a local http problem.

Any ideas on what to do ?

2

Start by ensuring that nothing is blocking the inbound HTTP requests.

4 Likes
3

2 posts were split to a new topic: Timeout during connect (likely firewall problem)

4

If you read the report, i have already validated that the http port is open and working, from a vps in azure cloud, and the local firwalls.

5

I have also validated the dns records are working.

6

Is that "/b" record still there with "hi" as the contents? Because I don't see it.

Also your tests used your vejen-karate.dk domain but your cert request is for camera.ttsh.dk

Right now both get responses from an Apache server 2.4.56. But, is the configuration in Apache identical for both? A better test would be to use the same domain name.

I can't reproduce the timeout problem using Let's Debug. Are you still seeing the timeout error? Because sometimes temp comms problems can cause that too.

4 Likes
7

I can't either.
I suspect it has something to do with rate limiting / IPS defenses.

3 Likes
8

I have around 41 domains.

all of them share the same .well-known folder, so it is idencally handledt.

The url of b and a has changed, because the acme-challenge folder is deleted by certbot after running.

I have created another pair of files, that can be reached a directory higher.
$ curl http://vejen-karate.dk/.well-known/a
test
test
$ curl http://vejen-karate.dk/.well-known/b
hi

A sample of other domains.
http://www.ttsh.dk/.well-known/a
http://www.ttsh.dk/.well-known/b
http://camera.ttsh.dk/.well-known//a
http://vejen-karate.dk/.well-known//a

e.g.
Domain: vejen-karate.dk
Type: connection
Detail: 46.32.37.185: Fetching http://vejen-karate.dk/.well-known/acme-challenge/oD83q_5KZClh1R5oVPFwVYa4a_FSFefUthrJ-CCLp9Y: Timeout during connect (likely firewall problem)

None of those domains seem to validate

9

I just ran the script again, to update.

snippet of the logs..

Domain: www.roedding-karate.dk
Type: connection
Detail: 46.32.37.185: Fetching
http://www.roedding-karate.dk/.well-known/acme-challenge/uelB0DXmvYgm7ii48DhbvFr-97erodNDmjBwQx2AzzE:
Timeout during connect (likely firewall problem)

Domain: www.thetroubleshooters.dk
Type: connection
Detail: During secondary validation: 46.32.37.185: Fetching
http://www.thetroubleshooters.dk/.well-known/acme-challenge/qVJLP0HSji6v_tSAPkGV6UNobYP8jx4x96l01wLL-G4:
Timeout during connect (likely firewall problem)

Domain: www.ttsh.dk
Type: connection
Detail: 46.32.37.185: Fetching
http://www.ttsh.dk/.well-known/acme-challenge/H6ImKOJhdmm2pjr2kL4rftFKw_qcCF2qPBmCey3opwg:
Timeout during connect (likely firewall problem)

10

Turns out that my firewall has had an update that changes it's DDOS protection settings, and now apparently it considers the polling of the http port, as a DDOS attack.

Thanks for looking at the problem.

Problem was found by running very fast parallel queries from a microsoft azure vps. Just odd it doesn't seem to affect websites..

3 Likes
11

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