Suddently lost internet connection..

[zeroarst]

Windows Version

Microsoft Windows [Version 10.0.19045.4170]

WSL Version

2.1.5.0

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

5.15.146.1

Distro Version

Ubuntu-20.04

Other Software

No response

Repro Steps

Until yesterday, my WSL2 worked fine with commands like curl, ping, ssh.. etc. Today those commands didn't work all of a sudden.

I can confirm ping 95.216.155.56 does work fine on Windows Git Bash.

curl -v google.com works fine on Windows Git Bash too.

I looked at solutions in 8358 and I have tried:

Disable ipv6

sudo sysctl -w net.ipv6.conf.all.autoconf=0 && sudo sysctl -w net.ipv6.conf.default.accept_ra=0 && sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1

Here are those tree values.

But still does not work with ping 95.216.155.56 command, just hang

With curl -v google.com command, failed too.

Check MTU value

Run PowerShell as administrator, execute command netsh interface ipv4 show subinterfaces, I get

Looks like value is 1500, which matches the eth0 mtu value 1500:

DNS configuratoin

I doubt this relates to DNS because pining ip address does not work.. but I still gave it a try..
Followed the guide from the reply.

sudo rm /etc/resolv.conf
sudo bash -c 'echo "nameserver 8.8.8.8" > /etc/resolv.conf'
sudo bash -c 'echo "[network]" > /etc/wsl.conf'
sudo bash -c 'echo "generateResolvConf = false" >> /etc/wsl.conf'
sudo chattr +i /etc/resolv.conf

Double check where they are correctly updated.

Then tried both ping and curl commands... does not work, and DNS is even worse, cannot resolve.

I don't know what else I can do.... please help..

Expected Behavior

curl, ping, ssh commands work.

Actual Behavior

curl, ping, ssh and all commands that connect to interenet don't work. Hang forever.

Diagnostic Logs

strace for ping command
strace for curl command

[github-actions]

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Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

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[zeroarst]

Actually I tried this solution and it works.. I don't know why.
https://stackoverflow.com/a/71756220/452486