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#1 Yesterday 08:42:34

NewArchUser0001
Member
Registered: 2024-03-29
Posts: 24

Linux Kernel 6.18.18-1-lts Network issues with older Router log in.

Hello i was just recently upgraded from Linux 6.12.74-1-lts  -> 6.18.17-1-lts and then there was another update to  6.18.18-1-lts which I'm on now.

This Router issue with the 6.18 kernels seems to be they don't seem to handle logging into older Routers using a older HTTP stack.

The symptoms are the web pages for the Router login takes ages to load and sometimes the the first page will show up normally but then other pages take all day to show up. Even logging out can take for ever. So after some digging around this seems to be some sort of timestamp issue and this is not so much a bug as it is the newer kernels i guess are expecting new routers to connect to and in that case there would be no login issues do to the updated HTTP stack the newer routers have.

When i was on 6.12.74-1-lts there was no issues with the Router log in at all i was just using it the other day before the Kernel update and everything was fine.

sudo sysctl -w net.ipv4.tcp_timestamps=0

The above command is temporary so if you reboot you will have to do that command 
again, to make the command permanent do the following..

Create a sysctl config file:

sudo nano /etc/sysctl.d/99-tcp-timestamps.conf

Put:

net.ipv4.tcp_timestamps = 0

Save, then apply:

sudo sysctl --system

or reboot.

Verify:

sysctl net.ipv4.tcp_timestamps

Should show:

net.ipv4.tcp_timestamps = 0

Anyway that sudo sysctl -w net.ipv4.tcp_timestamps=0 solved the issue for me so now i will wait to see if future kernels address this.

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