It appears vipergirls.to is blocked by some UK based providers for containing pornography.
You can check which UK provider blocks vipergirls.to here:
- https://www.blocked.org.uk/site/https://vipergirls.to
- https://www.blocked.org.uk/site/http...s.to/forum.php
A block like that can also result in slowness and other odd connection issues such as very slow loading pages.
If you are affected, you can do the following:
1) open your router and/or modem configuration page and change your DNS there from your ISP to those of Google or OpenDNS
2) or alternatively, do the same but on your own device in Windows, Linux, MacOS.
3) here is a tutorial about how to adjust your DNS: https://use.opendns.com/
4) you may need to flush your DNS or possibly reboot your device for changes to take effect.
Google DNS: 8.8.8.8 / 8.8.4.4
OpenDNS: 208.67.222.222 / 208.67.220.220
DNS.WATCH: 84.200.69.80 / 84.200.70.40 (anonymous, no logging)
This most likely solves your issues and may also solve issues with the Viper Ripper.
Alternatively, use a VPN or ask your provider to turn off family filters or opt-out of any filters yourself your provider may have set up.