one host blocked after 48hours

[raoul-markus]

Hi,

I have a strange issue with my home network. My raspberry zero can't reach my home server after ~2 days of normal operation. When I reboot the server, it works again.

only the connection between these two is broken. Other clients with similar software reach the server. Normally this server is up like 50-100 days without issues. The zero can ping/reach all other ips in the network.

So my assumption is that something on the server is blocking the connection to the zero after some time. I have browsed through the syslog.. checked iptables.... AFAIK I don#t have any firewall running on the server (which would be the first thing to look for if it would be windows).

Any idea what I could look for?


Network layout:
fritzbox <-> ethernet to server (ubuntu 14.04.5)
fritzbox <-> wlan to zero (rasbian 10)

Thanks,

Best regards,

[CelticWarrior]

Ubuntu 14.04 is EOL since April 2019. Please install a supported release.

There's no point in troubleshooting an obsolete release.

[raoul-markus]

ok. For this and other reasons, I upgraded the server. Since bananapi does not provide any newer ubuntu, I had to change hardware. It is now a small AWOW PC with a celeron.

Now with Ubuntu 20.04 server the observed issue no longer appears.