Package: thunderbird Version: 1:78.7.1-1 Severity: normal Dear Maintainer,
the company I work for uses XMPP for communicating internally. Some time ago I tried to switch to Thunderbird as an XMPP client. Before that I used pidgin. I noticed that the connection was not reliable and after some time it became clear that the connection did not work whenever I connected to our internal network via OpenVPN. After a some more digging I also found out that there are several other colleagues with the same problem all of which use Debian testing or unstable. I did not find someone with the same issue who uses a different operating system. I tried a Windows 10 VM myself and it worked. Other XMPP Clients also work without issues. When connecting to the XMPP server is see the "Connecting: Initializing encryption" message, however after some time the connection times out and Thunderbird tries again. I checked in Wireshark and I see what looks to me like a normal STARTTLS handshake but after three minutes I get an encryption alert. Sometimes after hours of trying it does connect and after that the connection is reliable (until I try to reconnect). Note that this issues only exists via VPN. The XMPP server is "Ignite Realtime Openfire Jabber server 3.10.0 or later" (this is the sever banner, if you need more detailed information let me know, I think I can provide it if necessary). If you need more information let me know, I will provide them as soon as possible. Thank you for your time and the great operating system you are providing. Best regards Stefan -- System Information: Debian Release: bullseye/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 5.10.0-2-amd64 (SMP w/4 CPU threads) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages thunderbird depends on: ii debianutils 4.11.2 ii fontconfig 2.13.1-4.2 ii libatk1.0-0 2.36.0-2 ii libbotan-2-17 2.17.3+dfsg-1 ii libbz2-1.0 1.0.8-4 ii libc6 2.31-9 ii libcairo-gobject2 1.16.0-5 ii libcairo2 1.16.0-5 ii libdbus-1-3 1.12.20-1 ii libdbus-glib-1-2 0.110-6 ii libevent-2.1-7 2.1.12-stable-1 ii libffi7 3.3-5 ii libfontconfig1 2.13.1-4.2 ii libfreetype6 2.10.4+dfsg-1 ii libgcc-s1 10.2.1-6 ii libgdk-pixbuf-2.0-0 2.42.2+dfsg-1 ii libglib2.0-0 2.66.6-2 ii libgtk-3-0 3.24.24-1 ii libicu67 67.1-6 ii libjson-c5 0.15-2 ii libnspr4 2:4.29-1 ii libnss3 2:3.61-1 ii libpango-1.0-0 1.46.2-3 ii libstdc++6 10.2.1-6 ii libvpx6 1.9.0-1 ii libx11-6 2:1.7.0-2 ii libx11-xcb1 2:1.7.0-2 ii libxcb-shm0 1.14-3 ii libxcb1 1.14-3 ii libxext6 2:1.3.3-1.1 ii libxrender1 1:0.9.10-1 ii psmisc 23.3-1 ii x11-utils 7.7+5 ii zlib1g 1:1.2.11.dfsg-2 Versions of packages thunderbird recommends: ii hunspell-tr [hunspell-dictionary] 1:7.1.0~rc3-2 Versions of packages thunderbird suggests: ii apparmor 2.13.6-9 pn fonts-lyx <none> ii libgssapi-krb5-2 1.18.3-4 ii libgtk2.0-0 2.24.33-1 -- no debconf information
