NethServer Version: 7.5.1804 (final)
Module:
I’ve been having issues with Internet browsing through Squid (way before posting this issue, so I think is not related), from connection timeout in clients browsers (Firefox mostly), to slow pages rendering and proxy error form client browser.
I believe this issue might be related to DNS resolution, DNS response taking to long or Squid trying to use IPv6 and then changing to IPv4.
Is there a way to check this for sure?