Not able to browse on Firefox

[kasi042]

Hmm, IPv4 vs IPv6 seems to be an issue, indeed. But I’d not too easily blame the ISP:

@rsp2

rsp@localhost:~> ping www.google.com
PING www.google.com(del11s10-in-x04.1e100.net (2404:6800:4002:815::2004)) 56 data bytes
64 bytes from del11s10-in-x04.1e100.net (2404:6800:4002:815::2004): icmp_seq=1 ttl=60 time=9.67 ms
64 bytes from del11s10-in-x04.1e100.net (2404:6800:4002:815::2004): icmp_seq=2 ttl=60 time=8.04 ms
64 bytes from del11s10-in-x04.1e100.net (2404:6800:4002:815::2004): icmp_seq=3 ttl=60 time=34.4 ms
64 bytes from del11s10-in-x04.1e100.net (2404:6800:4002:815::2004): icmp_seq=4 ttl=60 time=8.49 ms
64 bytes from del11s10-in-x04.1e100.net (2404:6800:4002:815::2004): icmp_seq=5 ttl=60 time=27.3 ms
^C
--- www.google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
rtt min/avg/max/mdev = 8.039/17.566/34.352/11.059 ms
rsp@localhost:~> ping 8.8.8.8
ping: connect: Network is unreachable
rsp@localhost:~> ping isbn.gov.in
ping: connect: Network is unreachable

“Network is unreachable” - it can’t even connect, but not consistently. Sometimes the domain name is working sometimes not.
You can’t ping 8.8.8.8, but can you ping the IPv6 address?
Can you resolve
dig -6 8.8.8.8

What do you get from

ping -6 fd00::1eed:6fff:fe45:cda5#53

If IPv6 is working, which is seems to be confirmed by
rsp@localhost:~> curl 'https://api6.ipify.org/' 2401:4900:1f36:4e22:b957:7fc3:a83f:663ersp@localhost:~>
already, it may be an issue with the IPv4 gateway.
What do you get from

ip route

ip -6 route

Some research on “Network is unreachable” may be helpful, too: linux - connect: Network is unreachable - Server Fault

[yvs]

You have IPv4-IPv6 dual stack network configuration (as it shown in your “ip a / ip r” output), the stack choice depends on a resolved address family via DNS. If your ISP has deployed CGNAT on the way to rollout ipv6, that supposed to work smoothly for IPv4 and IPv6. So that if there’s some misconfiguration related to IPv6, try temporarily to disable IPv6 for that wifi interface in network configuration, toggle off-on that wifi, and test out ipv4 sites accessibility. If it doesn’t help, I’d ask ISP to provide help how it supposed to work.

[arvidjaar]

@kasi042

What do you get from

ip route

It was already requested and the output was already provided and there is no default route for IPv4 so no surprise it does not work.

[rsp2]

Hi,
Code:

rsp@localhost:~> ip route
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.5 metric 600 
rsp@localhost:~> 

Regards,

rsp2

[kasi042]

@arvidjaar

It was already requested and the output was already provided and there is no default route for IPv4 so no surprise it does not work.

Right! I missed that. And it wasn’t followed up.

@rsp2 You’d better make sure to have a default route configured. How did you set up your W-LAN? Network Manager is recommendable for wifi. If IP4 is set to automatic it should get the gateway setting from your router, indeed:

[rsp2]

Hi All,
Thanks a lot for all the support . The problem originated with the WIFI and it has been set right this morning by the local technicians. I can now access all the websites.

Thanks & Regards,
rsp2