> On 9 Aug 2022, at 05:35, Tim via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, 2022-08-08 at 06:49 -0500, Roger Heflin wrote: >> ping either the router on the ISP, or ping one of the DNS servers. > > I had thought about that, but also wondered if repeatedly pinging such > things would bring up a firewall rule against me. Even a slow ping > rate, but over a long length of time, might be considered abuse. > > Though, one thing I have against ping tests is that they *only* test a > network's response to pings. > >> If you want to be truly accurate you might ping the ISP router. That >> would detect connection to the ISP router works, but connection to >> the DNS servers further in the network does not. > > I haven't used an ISP's DNS servers for decades, they were always crap. > I run BIND, so I'm quite certain a DNS failure isn't part of my network > notwork problem. > > Does anyone know what test Firefox uses to determine if you're offline > or online? Beyond NetworkManager on our OS raising a flag, Firefox > will sometimes decide for itself that you're online or off (and be > quite wrong about it). > > I know the detection can be turned off, for those who use browsers on > LANs and don't care about WWW, that detection gets in the way of > configuring equipment. But I haven't found anything that explains how > it does its trick. OS may poll a server in the internet to warn about lose of internet. Fedora, I recall, has such a server, as does Microsoft. You can check that none of the network interfaces are up on a host. I do not know what Firefox does, I have not seen it claim it’s offline myself. Personally what I do is check for services I care about being reachable. I check dns is working for my own cloud servers and then ping them to see that they respond. I do this on demand when I load a web page on my router, which is fedora based device. Barry > > -- > > uname -rsvp > Linux 3.10.0-1160.71.1.el7.x86_64 #1 SMP Tue Jun 28 15:37:28 UTC 2022 x86_64 > > Boilerplate: All unexpected mail to my mailbox is automatically deleted. > I will only get to see the messages that are posted to the mailing list. > > _______________________________________________ > users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx > Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
