I have a Draytek 2930 with pair of 110 modems. It keeps losing internet/browsing, vpn and remote access still work ok. Dropping lines does not help, only rebooting allows internet access. I tried using addresses directly no better, so DNS should be OK. Only on firmware 3.0.2 - not updated as the box is using a few VPN connections that were setup by other sites etc.
Any advice as we need to reboot a few times a day - even though vpn is still connected and I can use remote access on either modem to reboot.