Fedora 33 nslookup works but ping does not

bgstack15 — Fri, 07 May 2021 13:12:26 GMT

On my shiny new upgraded Fedora 33 desktop, I was unable to connect to my ssh server vm3.ipa.example.com. Of course my vm environment uses dhcp and I know I've had some dynamic dns update problems, and I just rebooted my dns servers, so maybe something was amiss. I logged in to the console of the vm (virsh console vm3) and made sure the system had the IP address I expected. Nslookup works, and shows me the same IP address. So why does ssh show "hostname not found"? The answer is: systemd-resolved had taken control of /etc/resolv.conf and made it a symlink to ../run/systemd/resolve/resolv.conf which obviously is not what I want. So, I unlinked the file, made the real resolv.conf, and also threw in a bonus:

sudo unlink /etc/resolv.conf
echo "nameserver 192.168.1.1" | sudo tee /etc/resolv.conf
echo "nameserver 192.168.1.2" | sudo tee /etc/resolv.conf
echo "search ipa.example.com example.com" | sudo tee /etc/resolv.conf
sudo chattr +i /etc/resolv.conf

And then for good measure I disabled and masked systemd-resolved.

sudo systemctl disable --now systemd-resolved.service
sudo systemctl mask systemd-resolved.service

Don't let Systemd ruin your networking!

Firefox disable a ping

bgstack15 — Mon, 01 Jul 2019 13:26:36 GMT

What is an html a ping

An html "a ping" is a characteristic of an tag that is used to track when a link is followed. An example: the following link to the front page of this blog has an A ping characteristic: https://bgstack15.wordpress.com The characteristic looks like:

<a href="https://bgstack15.wordpress.com" ping="http://bgstack15.wordpress.com/ping">https://bgstack15.wordpress.com</a>

Disable html ping in Firefox

In about:config, set:

browser.send_pings = false

References

Weblinks