I have recently started using Ubuntu Mate 17.04. I have established a VPN connection having Point-to-Point Tunneling (PPTP) type and it had been working very good. I have recently encountered the problem of not being able to open facebook or youtube pages (although being able to view other websites that are filtered by my ISP), and I don't know what wrong must have happened. Could you please tell me how I could find where my problem might be and how to fix it?
Thank you very much in advance.
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1 Answer
After searching the web as much as possible, I found some other posts by other people having similar problems. And there were also all different sorts of answers given.
Among all those answers, I was introduced to the concept of MTU. I decided to give it a try changing the contents of /etc/network/interfaces by adding
MTU 9000
to the end of my enp3s0 configurations, saving it and restarting Ubuntu to check if it has started working properly, and yes: it did start to work like a charm.
In case anyone out there is eager to know more about MTU he can find more here on wikipedia page:
Maximum Transmission Unit
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This is also worth to mention that this problem appears after the very first upgrade and after the restart we see it causing headaches for users. The default value of mtu would be 1500, and although after the upgrade this value did not change I had to make the system use my introduced value as mentioned in the answer provided above.– TowerJun 15, 2017 at 21:38