Reef-pi DNS error for some computers only

lucifer · Oct 25, 2021

Hi all,

Having a weird issue where I can only access the reef-pi local website from one laptop. All other computers get a DNS_PROBE_FINISHED_NXDOMAIN fail to connect. Can putty into the raspberry pi from all computers.

I have tried sudo systemctl restart reef-pi.service to no effect.

sudo netstat -tulnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 653/sshd
tcp6 0 0 :::80 :::* LISTEN 21713/reef-pi
tcp6 0 0 :::22 :::* LISTEN 653/sshd
udp 0 0 0.0.0.0:5353 0.0.0.0:* 363/avahi-daemon: r
udp 0 0 0.0.0.0:53693 0.0.0.0:* 363/avahi-daemon: r
udp 0 0 0.0.0.0:68 0.0.0.0:* 647/dhcpcd
udp6 0 0 :::5353 :::* 363/avahi-daemon: r
udp6 0 0 :::37503 :::* 363/avahi-daemon: r

Please help!

robsworld78 · Oct 26, 2021

lucifer said:
Hi all,

Having a weird issue where I can only access the reef-pi local website from one laptop. All other computers get a DNS_PROBE_FINISHED_NXDOMAIN fail to connect. Can putty into the raspberry pi from all computers.

I have tried sudo systemctl restart reef-pi.service to no effect.

sudo netstat -tulnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 653/sshd
tcp6 0 0 :::80 :::* LISTEN 21713/reef-pi
tcp6 0 0 :::22 :::* LISTEN 653/sshd
udp 0 0 0.0.0.0:5353 0.0.0.0:* 363/avahi-daemon: r
udp 0 0 0.0.0.0:53693 0.0.0.0:* 363/avahi-daemon: r
udp 0 0 0.0.0.0:68 0.0.0.0:* 647/dhcpcd
udp6 0 0 :::5353 :::* 363/avahi-daemon: r
udp6 0 0 :::37503 :::* 363/avahi-daemon: r

Please help!

Hi, my guess is it's a network setting somewhere but not sure what to suggest. It might be worth trying to reformat the SD card and start over.

lucifer · Oct 27, 2021

robsworld78 said:
Hi, my guess is it's a network setting somewhere but not sure what to suggest. It might be worth trying to reformat the SD card and start over.

Thanks Rob! I will be trying this and getting back to y'all.

Jedi Knghit · Oct 27, 2021

That error means the computer could not resolve a name to an IP address. Are you using an IP address or name to access Reef-pi?

pseudorand · Oct 27, 2021

Connect via ip from your browser. (i.e. http://192.168.0.123, but use your reef pi ip ). I assume putty is using the ip since putty works.

Perhaps the laptop where it works has a cached dns record. Does another browser on that computer work too, or just the one you usually use?

edawq · Oct 28, 2021

Out of curiousity are the devices that it works on Apple devices?
If it is then I'm assuming your trying to access the pi via something.local which is configured through mdns. Apple devices support this natively but Windows machines don't But if you install iTunes or Bonjour from Apple it should start working then

lucifer · Oct 30, 2021

Jedi Knghit said:
That error means the computer could not resolve a name to an IP address. Are you using an IP address or name to access Reef-pi?

name! http://name.local

lucifer · Oct 30, 2021

pseudorand said:
Connect via ip from your browser. (i.e. http://192.168.0.123, but use your reef pi ip ). I assume putty is using the ip since putty works.

Perhaps the laptop where it works has a cached dns record. Does another browser on that computer work too, or just the one you usually use?

i will try this and get back to you, thnx

lucifer · Oct 30, 2021

edawq said:
Out of curiousity are the devices that it works on Apple devices?
If it is then I'm assuming your trying to access the pi via something.local which is configured through mdns. Apple devices support this natively but Windows machines don't But if you install iTunes or Bonjour from Apple it should start working then

Yes! I should have mentioned that. I thought it was weird but figured it was just a coincidence mistakenly. But what's weird is that I had no problems before on windows machine previously. Then I got the error and have tried even reimaging my sd card to no avail. I will install and try again ty!

lucifer · Oct 30, 2021

pseudorand said:
Connect via ip from your browser. (i.e. http://192.168.0.123, but use your reef pi ip ). I assume putty is using the ip since putty works.

Perhaps the laptop where it works has a cached dns record. Does another browser on that computer work too, or just the one you usually use?

That worked! Thanks a lot! I used to connect to the tanks "name" e. g. http://name.local but then it stopped working, even after re-imaging the raspbian sd card.

Ranjib · Oct 31, 2021

the local domain (.local) dns resolution implementation depends a little bit differently between windows, linux and osx. Apple uses bonjour while linux uses avahi (no idea what windows does). They all uses a common technique called mDNS.
My advice will be to google for your device/os specific mDNS issues. That should lead to some specific tuning you may have to do to get the local domain working

lucifer · Oct 31, 2021

Ranjib said:
the local domain (.local) dns resolution implementation depends a little bit differently between windows, linux and osx. Apple uses bonjour while linux uses avahi (no idea what windows does). They all uses a common technique called mDNS.
My advice will be to google for your device/os specific mDNS issues. That should lead to some specific tuning you may have to do to get the local domain working

Thank you! Using the IP address until I get the dns resolution implementation working.