I just tested the latest firmware 7.10 (which embeds tailscale 1.70) and subsequently updated Tailscale to the latest 1.76 version, and all is happy again in the Web UI.
@pau.nadeu I have the same need (I require accept-dns to be disabled) so for now until or unless Teltonika will provide us a GUI option for this, I came up with this poor man’s workaround:
Create a script, save to e.g. /etc/tailscale_disable_dns
#!/bin/sh
command -v tailscale &>/dev/null || exit 1
if [ -e /etc/resolv.pre-tailscale-backup.conf ]; then
tailscale set --accept-dns=false
fi
Make executable:
chmod +x /etc/tailscale_disable_dns
Add crontab entry (runs every 5 min, adjust as needed):
# Put your custom commands here that should be executed once
# the system init finished. By default this file does nothing.
/etc/tailscale_disable_dns
exit 0