[gnutls-devel] GnuTLS | Connect connect to github.com, download.mono-project.com (#990)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Fri May 8 18:45:09 CEST 2020

Maarten Boekhold created an issue: https://gitlab.com/gnutls/gnutls/-/issues/990

## Description of problem:
GnuTLS based applications fail to connect to github.com and download.monoproject.com

## Version of gnutls used:

## Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)
Ubuntu 20.04 Focal Fossa

## How reproducible:
Consistently reproducable

Steps to Reproduce:
`git clone https://github.com/prominic/groovy-language-server.git`
echo "deb https://download.mono-project.com/repo/ubuntu stable-bionic main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list
sudo apt update

## Actual results:
**GIT_CURL_VERBOSE=1 git clone https://github.com/prominic/groovy-language-server.git**
Cloning into 'groovy-language-server'...
* Couldn't find host github.com in the .netrc file; using defaults
*   Trying
* Connected to github.com ( port 443 (#0)
* found 388 certificates in /etc/ssl/certs
* ALPN, offering h2
* ALPN, offering http/1.1
* gnutls_handshake() failed: Error in the pull function.
* Closing connection 0
fatal: unable to access 'https://github.com/prominic/groovy-language-server.git/': gnutls_handshake() failed: Error in the pull function.

**sudo apt update***
Get:11 http://ae.archive.ubuntu.com/ubuntu focal-updates/universe i386 Packages [20.0 kB]                            
Get:12 http://ae.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages [27.2 kB]                           
Ign:13 https://download.mono-project.com/repo/ubuntu stable-bionic InRelease                                               
Err:14 https://download.mono-project.com/repo/ubuntu stable-bionic Release
  Could not wait for server fd - select (11: Resource temporarily unavailable) [IP: 443]

## Expected results:
* `git clone` succeeds
* `sudo apt update` succeeds

I already posted about this in https://gitlab.com/gnutls/gnutls/-/issues/984#note_339171011 but in hindsight I don't think this is the same issue, so I'm creating a separate issue for this.

$ gnutls-cli github.com
Processed 128 CA certificate(s).
Resolving 'github.com:443'...
Connecting to ''...
*** Fatal error: The operation timed out

$ apt show libgnutls30
Package: libgnutls30
Version: 3.6.13-2ubuntu1

$ apt show gnutls-bin
Package: gnutls-bin
Version: 3.6.13-2ubuntu1

OpenSSL-linked curl works fine, so do browsers, wget... I also have a Linux Mint 19.2 VM (based on Ubuntu bionic), where I have none of these issues. On the same network btw. No proxies involved here, no authentication required anywhere.[debug.txt](/uploads/671e3bac6aff762ea9c69273cb2f3128/debug.txt)

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