wifi disconnects when changing settings
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@stephenw10 Sorry for the late response, went to the office to try this out.
So I deleted a DHCP reservation, and clicked the green Apply Changes up the top and my pings to LAN on wifi stopped working for ~20 seconds. In my initial post I said that the wifi fully disconnected, but I was mistaken. Wifi stays connected from both the AP's perspective and the laptop's perspective.
This is the DHCP log from when I clicked Apply:
Dec 16 13:08:16 dhcpd DHCPREQUEST for 192.168.0.44 from 42:42:a2:83:15:d9 via lagg0.4091 Dec 16 13:08:14 dhcpd Server starting service. Dec 16 13:08:14 dhcpd Sending on Socket/fallback/fallback-net Dec 16 13:08:14 dhcpd Sending on BPF/lagg0.4091/00:08:a2:10:10:9a/192.168.0.0/24 Dec 16 13:08:14 dhcpd Listening on BPF/lagg0.4091/00:08:a2:10:10:9a/192.168.0.0/24 Dec 16 13:08:14 dhcpd Sending on BPF/lagg0.4093/00:08:a2:10:10:9a/192.168.40.0/21 Dec 16 13:08:14 dhcpd Listening on BPF/lagg0.4093/00:08:a2:10:10:9a/192.168.40.0/21 Dec 16 13:08:14 dhcpd Sending on BPF/lagg0.42/00:08:a2:10:10:9a/10.42.0.0/23 Dec 16 13:08:14 dhcpd Listening on BPF/lagg0.42/00:08:a2:10:10:9a/10.42.0.0/23 Dec 16 13:08:14 dhcpd Sending on BPF/lagg0.50/00:08:a2:10:10:9a/10.50.0.0/24 Dec 16 13:08:14 dhcpd Listening on BPF/lagg0.50/00:08:a2:10:10:9a/10.50.0.0/24 Dec 16 13:08:14 dhcpd Sending on BPF/lagg0.60/00:08:a2:10:10:9a/10.60.0.0/24 Dec 16 13:08:14 dhcpd Listening on BPF/lagg0.60/00:08:a2:10:10:9a/10.60.0.0/24 Dec 16 13:08:14 dhcpd Wrote 103 leases to leases file. Dec 16 13:08:14 dhcpd Wrote 0 new dynamic host decls to leases file. Dec 16 13:08:14 dhcpd Wrote 0 deleted host decls to leases file. Dec 16 13:08:14 dhcpd For info, please visit https://www.isc.org/software/dhcp/ Dec 16 13:08:14 dhcpd All rights reserved. Dec 16 13:08:14 dhcpd Copyright 2004-2018 Internet Systems Consortium. Dec 16 13:08:14 dhcpd PID file: /var/run/dhcpd.pid Dec 16 13:08:14 dhcpd Internet Systems Consortium DHCP Server 4.4.1 Dec 16 13:08:14 dhcpd Database file: /var/db/dhcpd.leases Dec 16 13:08:14 dhcpd Config file: /etc/dhcpd.conf Dec 16 13:08:14 dhcpd For info, please visit https://www.isc.org/software/dhcp/ Dec 16 13:08:14 dhcpd All rights reserved. Dec 16 13:08:14 dhcpd Copyright 2004-2018 Internet Systems Consortium. Dec 16 13:08:14 dhcpd Internet Systems Consortium DHCP Server 4.4.1In DNS forwarder, I deleted a DNS entry and then when I clicked the green Apply Changes button, the same situation with losing wifi happened:
Dec 16 13:11:14 dnsmasq 28872 using nameserver 8.8.8.8#53 Dec 16 13:11:14 dnsmasq 28872 ignoring nameserver 127.0.0.1 - local interface Dec 16 13:11:14 dnsmasq 28872 reading /etc/resolv.conf Dec 16 13:11:12 dnsmasq 28872 read /etc/hosts - 323 addresses Dec 16 13:11:12 dnsmasq 28872 using nameserver 1.1.1.1#53 Dec 16 13:11:12 dnsmasq 28872 using nameserver 8.8.8.8#53 Dec 16 13:11:12 dnsmasq 28872 ignoring nameserver 127.0.0.1 - local interface Dec 16 13:11:12 dnsmasq 28872 reading /etc/resolv.conf Dec 16 13:11:12 dnsmasq 28872 compile time options: IPv6 GNU-getopt no-DBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP no-conntrack ipset auth DNSSEC loop-detect no-inotify dumpfile Dec 16 13:11:12 dnsmasq 28872 started, version 2.80 cachesize 10000 Dec 16 13:11:11 dnsmasq 54701 exiting on receipt of SIGTERMWeirdly, a ping running on LAN with no wifi involved didn't have the issue.
Edit: It looks like dnsmasq and dhcpd both received SIGTERM at the same time as eachother in both tests.
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Anything in the system log?
None of that looks unexpected. Those events are complete in a few seconds and lack of access to dhcp or dns should not prevent anything that's already open.
Steve
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@stephenw10 System > General looks like what I'd expect:
Dec 16 13:10:52 php-fpm /services_dnsmasq.php: End of configuration backup to https://acb.netgate.com/save (success). Dec 16 13:10:47 php-fpm /services_dnsmasq.php: Beginning configuration backup to https://acb.netgate.com/save Dec 16 13:10:47 check_reload_status Syncing firewall Dec 16 13:08:08 php-fpm /services_dhcp.php: End of configuration backup to https://acb.netgate.com/save (success). Dec 16 13:08:03 php-fpm /services_dhcp.php: Beginning configuration backup to https://acb.netgate.com/save Dec 16 13:08:03 check_reload_status Syncing firewallSystem > Routing looks a bit weird, and looks like it's timezoned differently:
Dec 17 02:39:40 radvd 70402 removing /var/run/radvd.pid Dec 17 02:39:40 radvd 70402 sending stop adverts Dec 17 02:39:40 radvd 70402 exiting, 1 sigterm(s) received Dec 17 02:20:22 radvd 70283 invalid all-zeros prefix in /var/etc/radvd.conf, line 9 Dec 17 02:20:22 radvd 70283 version 2.17 started Dec 17 01:49:59 radvd 10014 returning from radvd main Dec 17 01:49:59 radvd 10014 removing /var/run/radvd.pid Dec 17 01:49:59 radvd 10014 sending stop adverts Dec 17 01:49:59 radvd 10014 exiting, 1 sigterm(s) received The radvd.conf file only contains: `# Automatically Generated, do not edit` -
Hmm, nothing much there. It should not stop responding to local pings just by doing that.
Are you running 2.4.5p1? 2.4.5 had a performance bug that could present very much like that.
https://redmine.pfsense.org/issues/10414
Though even that was not 20s!Steve
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@dfairley said in wifi disconnects when changing settings:
System > General
Dec 16 13:10:52
...
System > Routing
Dec 17 02:39:40That's strange.
radvd is a "IPv6" process. You are using IPv6 ?
And why would it start stop every 10 minutes between 1 and 2 PM ??@dfairley said in wifi disconnects when changing settings:
Multi-wan is configured as a failover
Mtake a backup of your settings, and then goto classic-single-WAN setup. make your settings as standard as possible. Just to eliminate possible issues.
@dfairley said in wifi disconnects when changing settings:
when clicking Refresh
What refresh (button ?) ?
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@stephenw10 said in wifi disconnects when changing settings:
Are you running 2.4.5p1?
I am, yep.
@gertjan said in wifi disconnects when changing settings:
radvd is a "IPv6" process. You are using IPv6 ?
And why would it start stop every 10 minutes between 1 and 2 PM ??Not intentionally - I have "Allow IPv6" unchecked, and "Prefer IPv4 over IPv6" checked.
I'm not sure why it start-stopped. It only happened those two times yesterday and prior to that, December 12. Seems to coincide with config changes.@gertjan said in wifi disconnects when changing settings:
Mtake a backup of your settings, and then goto classic-single-WAN setup. make your settings as standard as possible. Just to eliminate possible issues.
I'll try this out over Christmas. Thank you for the idea.
@gertjan said in wifi disconnects when changing settings:
What refresh (button ?) ?
Sorry, I meant the green Apply Config button that appears up the top when you save a config change.
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Hmm, I'd probably be running a packet capture to see what's actually happening at that point.
If pings are arriving there's no reason pfSense would not respond for that long.
Steve
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So I confirmed that packets are only dropped if I'm connected with wifi. With LAN there's no interruption.
Then, I disabled snort, and switched to a basic single-wan setup. Restarted everything. The issue still occured: packets are dropped for ~30 seconds when I apply a DNS Forwarder or DHCP server config change.
I updated my unifi APs + controller and no change. Then I unchecked "Block LAN to WLAN Multicast and Broadcast Data" on the unifi AP side of things. Now I only lose packets for ~1 second. Zoom calls no longer drop out. Works for me!Thank you both for helping me figure it out.
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@dfairley said in wifi disconnects when changing settings:
Then I unchecked "Block LAN to WLAN Multicast and Broadcast Data"
Blocking broadcasts coming from LAN, for example pfSEnse ?
Right away I thought : what about DHCP transactions ? -
Mmm, that's fun!
