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This documentation applies only Turris OS 3.x that is no longer present in newly sold routers. The new documentation is located at

Errata – Index of known bugs

This page contains list of known bugs.

PPTP VPN network, GRE or FTP stopped working

Affected Turris OS:

since version Turris OS: 3.11.20

In Turris OS 3.11.20 update, we disabled automatic conntrack helper assignment in /etc/sysctl.conf because of known vulnerability NAT Slipstreaming (CVE-2020-28041). This can break PPTP VPN network and other services like GRE, FTP.

To fix this issue it is necessary to install kmod-nf-nathelper-extra. However, please not that this makes your router vulnerable against NAT Slipstreaming attack.

mwan3 does not work

Affected Turris OS:

since version Turris OS 3.11

In some cases, mwan3 is not working. The workaround for this issue is to re-flash your router using the latest medkit.

Pakon graph in user interface Foris expands to menu

Affected Turris OS:

since version Turris OS 3.11.2.

In some cases, there is possibility that graph is large and it expands to the menu. More details is included in GitLab issue turris/foris/foris-pakon-plugin#34..