I cannot access to GitHub only on my Ubuntu 18.04 machine and all other machines (Windows PC, iPad, Phone) connected to the same network can access GitHub.
When I try to ping GitHub, I get
The result of run
Server: 127.0.0.53 Address: 127.0.0.53#53 Non-authoritative answer: Name: github.com Address: 184.108.40.206
If I try
sudo route -n:
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.178.1 0.0.0.0 UG 600 0 0 wlp4s0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlp4s0 192.168.178.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp4s0
ping google.com, it works.
I can't access GitHub in the browser also. However, all other websites work fine. Also, I can access GitHub on other devices. Is there anything wrong with the DNS?