Linux

46777 readers

1951 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

[email protected]

[not solved] I think I messed something up in the router settings but cannot understand what... now I have no internet connection (lemmy.kde.social)

submitted 7 months ago* (last edited 7 months ago) by [email protected] to c/[email protected]

31 comments fedilink hide all child comments

Hello! I (tried, at least) converted an old laptop to a Debian home server, and I was trying to set up duckdns.org and to enable port forwarding on my router. internet connection was working, I installed packages, docker, immich, etc, and then suddenly (I don't know exactly when) it refuses to connect to the internet. It does connect to local addresses (I can ssh into it) but ping google.com and any other internet-involving command fail. I had set up a rule on the router to forward port 80 to the device's port 80, but I then removed the rule and it still does not connect to the internet. I rebooted the router but nothing changed. Any idea what could be? the router is a Vodafone router.

I changed the hostname to debianserver but on the router it is still written debian. Also, it's the only device with unknown ipv6

thanks in advance!

EDIT: I rebooted again the server, and now ipv6 is not unknown anymore, and the hostname is correct. however, it still does not connect to the internet

EDIT 2:

only one device (debianserver) has this problem, other devices work as before

EDIT 3:

I don't know if it's useful or not, but if I boot a live debian USB in the server internet works

~~SOLUTION:~~ aaaaand no it does not work, after restarting docker it seems to work because all the brodges are yet to be created and it takes some time, after like 30 seconds it does not work as before :(

edit the file /lib/systemd/system/docker.service
append the flag --bip=192.168.3.1/24 to ExecStart=....
systemctl daemon-reload
systemctl restart docker

docker was the fucker that messed everything up and made me lose a few hours!

EDIT 4:

it seems that ip route flush 0/0 restores the internet connectivity until reboot... I don't know what does this means but can be a temporary workaround I guess? I really have no idea how to solve this

FINAL EDIT: I gave up. I removed debian and installed fedora, and now it all works like a charm

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 7 months ago (11 children)

tubbadu@debianserver:~$ wget 104.18.114.97
--2024-01-18 21:35:38--  http://104.18.114.97/
Connecting to 104.18.114.97:80... failed: No route to host.

really really thanks for the help!

[–] [email protected] 3 points 7 months ago* (last edited 7 months ago) (8 children)

Please try wget https://104.18.114.97, if this one goes through I'd think the problem could be related to a faulty forwarding of regular internet traffic (port 80). If that fails as well I'd guess it's to due with the DHCP/Static IP's and involves your router. I'm absolutely clueless about Vodafone routers though.

Edit: Any connection would show "The certificate's owner does not match hostname ‘104.18.114.97’"

[–] [email protected] 1 points 7 months ago (2 children)

Edit: Any connection would show “The certificate’s owner does not match hostname ‘104.18.114.97’”

sorry I don't think I understand, where should this be written?

[–] [email protected] 2 points 7 months ago (1 children)

Here I've tried wget https://104.18.114.97. It's able to connect to the IP on port 443, but shows an error message since I'm not using a domain name. But at least I know I've reached the server.

[–] [email protected] 1 points 7 months ago

so this means that the problem is actually the server? or do I misunderstand?

load more comments (5 replies)

load more comments (7 replies)