Problema ao carregar o github e mais algumas páginas

Question

Li muitos posts que falam sobre problemas semelhantes, mas tudo funcionou para mim. Quando tento entrar no github.com ele diz:

No se puede conectar

Firefox no puede establecer una conexión con el servidor en github.com.

Eu tentei com outros navegadores e acontece da mesma maneira. (agora estou usando o Firefox Quantum). Eu fiz o host com o github:

$ host www.github.com

www.github.com is an alias for github.com.
github.com has address 192.30.253.113
github.com has address 192.30.253.112
github.com mail is handled by 5 alt2.aspmx.l.google.com.
github.com mail is handled by 1 aspmx.l.google.com.
github.com mail is handled by 10 alt3.aspmx.l.google.com.
github.com mail is handled by 10 alt4.aspmx.l.google.com.
github.com mail is handled by 5 alt1.aspmx.l.google.com.

e:

ping -c 3 www.github.com

PING github.com (192.30.253.113) 56(84) bytes of data.
From 192.168.254.100 icmp_seq=1 Destination Host Unreachable

e: traceroute www.github.com

traceroute to www.github.com (192.30.253.113), 30 hops max, 60 byte packets
 1  192.168.254.100 (192.168.254.100)  3061.719 ms !H  3061.680 ms !H  3061.672 ms !H

mas com o google está tudo bem:

$ traceroute www.google.es
traceroute to www.google.es (216.58.210.163), 30 hops max, 60 byte packets
 1  192.168.0.1 (192.168.0.1)  0.649 ms  1.042 ms  1.770 ms
 2  static-10-0-235-87.ipcom.comunitel.net (87.235.0.10)  20.051 ms  22.691 ms  24.117 ms
 3  172.29.144.110 (172.29.144.110)  25.077 ms 172.29.144.106 (172.29.144.106)  27.848 ms 172.29.144.110 (172.29.144.110)  28.457 ms

Obrigado

ip route show :

default via 192.168.0.1 dev enp3s0f1  proto static  metric 100 
default via 192.168.0.1 dev wlp2s0  proto static  metric 600 
169.254.0.0/16 dev enp3s0f1  proto static  scope link  metric 1000 
172.17.0.0/16 dev docker0  proto kernel  scope link  src 172.17.0.1 linkdown 
192.0.0.0/8 dev vboxnet0  proto kernel  scope link  src 192.168.254.100 linkdown 
192.168.0.0/24 dev enp3s0f1  proto kernel  scope link  src 192.168.0.161  metric 100 
192.168.0.0/24 dev wlp2s0  proto kernel  scope link  src 192.168.0.156  metric 600

    

Answer 1

Okey, acho que encontrei a solução para o meu problema. Depois de steeldriver disse isso , pensei por que não atualizar a virtualbox, pois parecia ser algo relacionado a ela. E eu fiz isso e tudo funciona bem!

A versão do VirtualBox que estou usando agora é 5.2.0.