[sudo-discuss] omni wifi going up and down constantly

[Steve Leach]

The problem did seem to be fixed yesterday, but the disconnections are
occurring again today and ramping up in frequency as the day progresses.
Three or four days ago the connection would be lost every five minutes or
so, yesterday I believe it was stable for the whole day for the first time
in months. This morning it was once every hour or two, now it's about two
or three times an hour.

On Feb 7, 2018 10:01 AM, "Yardena Cohen" <yardenack at gmail.com> wrote:

> I think I fixed this - can you try again?
>
> When we first set up the new router we had the same problem and solved
> it with an iptables rule to let DHCP traffic in & out which had been
> blocked before. The evidence is really obvious if you type journalctl
> on the router - you see a stream of error messages like:
>
> Feb 07 09:50:00 saros dhcpd[976]: send_packet: Operation not permitted
> Feb 07 09:50:00 saros dhcpd[976]: dhcp.c:3903: Failed to send 300 byte
> long packet over fallback interface.
>
> When writing the rules into a file to make it permanent, I tried to be
> too clever and added ' -o !enp3s0' to the rule because I thought, "who
> wants to send DHCP to the WAN anyway? What could possibly go wrong!"
>
> Then last week I rebooted the router, the new rules took effect, and
> the extra '-o !enp3s0' caused the rule to fail (still not sure why),
> thus blocking crucial DHCP traffic again. As soon as I replaced the
> rule just now with a simpler one, the error messages stopped.
>
> tl;dr my fault for being too secure sorry
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