Can't connect to any IPv4 addresses (4.19 Kernel)

Technical Issues and Assistance Networking
#1

So this is an odd issue I haven't seen anyone else with. All of a sudden, IPv4 addresses are unreachable on my Manjaro desktop, Ethernet hooked up computer.

I'm not super technical, but I've found a few things that seem out of place, such as I can't ping 8.8.8.8:

$ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.2.1 icmp_seq=1 Destination Net Unreachable

But something like Google.ca's IPv6 address is reachable:

$ ping google.ca
PING google.ca(yyz10s03-in-x03.1e100.net (2607:f8b0:400b:808::2003)) 56 data bytes
64 bytes from yyz10s03-in-x03.1e100.net (2607:f8b0:400b:808::2003): icmp_seq=1 ttl=54 time=28.3 ms

Other useful information:

Kernel: 4.19.85-1-MANJARO

Tried rebooting/disconnecting/reconnecting etc. Any advice?

#2

for disable ipv6

sudo nano /etc/default/grub

Find the line that contain "GRUB_CMDLINE"

Add "ipv6.disable=1" to the boot option, then save your grub file

and update grub

sudo update-grub
#3

Verify with

ping -4vc4 manjaro.org

By experience, only a few things happen all of a sudden.
Usually, something prepares the road... :wink:

#4

$ ping -4vc4 manjaro.org
PING manjaro.org (176.9.38.148) 56(84) bytes of data.
From web.ht812 (192.168.2.1) icmp_seq=1 Destination Net Unreachable

Also @stephane why would I disable IPv6 if that's the only one that works?

#5

It still works from other devices? (mobile phone, etc?)

#6

There were issues before, but they've all been sorted by restarting the router. It's only the computer that's hooked up to the Ethernet that can't connect to IPv4.

#7

Update: It was the router, not Manjaro. Was able to fix by messing with the wires.

#8

Please, share more details, if possible. Was there any broken wire, or wrong type, or other?

1 Like
#9

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