Internet issues on Monterey

Can confirm. The number of sockets now remains stable, which indicates that the system correctly removes them once they are closed. This should prevent the runaway/exhaustion condition from popping up again. I will report if anything changes, but for now, it looks like Monterey 12.2 fixed the problem with Cisco AnyConnect.

Thank you mtohidn for correctly diagnosing the problem earlier.

The update to Monterey 12.2 seems to have fixed the issue with DNS stopping working after a time. I've been running netstat -anxv -p udp | wc -l after applying the update and instead of it counting up and up and up till DNS stops working. The number has been going up and down staying under 100 vs counting up to 30K+. It seems like something is cleaning up old UDP sessions.

In short upgrade to 12.2

Alas, I upgraded to 12.2 last night because I was having the failing DNS issue and the skyrocketing number of open sockets. Now, the sockets are stable and in the low hundreds, but I just had to reboot my computer because I couldn't get DNS working.

For reference, I do use Cisco AnyConnect. But I didn't see any issues with that after the upgrade.

We'll see if this was just a one-off issue, or I keep running into DNS issues on 12.2.

I lost DNS access again after a reboot on 12.2. This time, I set 2 of 3 Cisco AnyConnect packet filters to inactive, and everything jumped back to life again. So, at least in my case, things probably are better with 12.2 (I'd tried a similar technique before in 12.1 to no avail), but AnyConnect is still giving me hassles.

Not as bad as you, but yeah, I'm having the same issue ever since I upgraded to Monterey. I think I'm getting once or twice every day. Sometimes it comes back after 10-20 minutes.. but restarting the computer fixes right away.

I know this is not a router issue because I experienced this from multiple places. This is super annoying.

Hi, I have 3 Macs running Monterey, iMac and MacMini no problems.

My iMac is a 2013 running OCLP Monterey with updates, no problems!!

My MacBook Pro late 2015 with a clean install from Apple has peculiar problems with WiFi.

Sometimes when I boot up it refuses to connect, also when waking from sleep (lid closed)

Same MBP booting to Catalina or Bootcamp no wifi issues, DRIVING me a little crazy!!

Am about to install Big Sur in another volume and see if that does it!!

Fingers crossed for a result.

I'm having the exact same problem on my IMac after updating to Monterey and I'm beyond frustrated. I've tried all the suggested fixes with no success. This is clearly a software issues and not an issue with my network. All my other devices, including my Mac Book (which i have not updated to Monterey) have no problem connecting and staying connected. This has destroyed the functionality of my desktop. I regret updating and will not update my laptop to Monterey as a result.

To clarify the above post, go to System Preferences->Network and under the Location menu at the top, select Edit Locations…. Here you will hit the + (plus) button and create a new location. I called mine "Monterey". Then, as stated, click Apply in the lower right of the prefs pane.

Worked for me.

After updating to Monterey 12.2.1 I immediately began having problems with websites freezing; I'd have to reboot the computer to get it to "unfreeze" only to have it freeze again later. My wife also started having issues with streaming videos freezing on her iPad. Finally I rebooted the router/modem and voila!, the problem disappeared. My suspicion is that the downloading of 12.2.1 (just a w.a.g.) did something to the modem...what, I could not say. It only takes a couple of minutes, worth a shot. Actually, I'm beginning to think that this (reboot the modem) should be the 1st step in any trouble-shooting exercise.

Having the same problem, and I believe that @mtohidn is correct. We use AnyConnect at my workplace, and several times yesterday my networking became unresponsive; had to reboot to get things working again. IT is recommending wiping the disk and re-installing the OS, which is not feasible right now. I also tried resetting the SMC, which seemed to help for the second half of yesterday, but ran into the issue again this morning.

Doesn't Mac OS have a command line tool to restart networking services? IIRC Ubuntu/Linux makes this possible though I don't recall the command.

Wild that this is still a problem. Completely cleaned Macbook Pro 2015, and every time I upgrade to the latest Monterey update this issue persists. Maybe adjusting some other settings will fix it, but I don't have the patience to troubleshoot all that when I already know that restoring Big Sur fixes the problem.

I have this issue too with latest Monterey 12.2.1, the behavior is:

once in a few days, my Mac does not resolve DNS...

ping IP works, ping domain name does not resolve; (but "host domain" does return result, is that strange?)

Safari / Firefox do not work to browse internet, but Chrome works (maybe it has its own way to resolve DNS or have a local dns cache?)!

No firewall in place - so definitely not a firewall issue

Reset wifi profile (remove and add back or removing plist files etc.) do not help...

when issue happens, wifi and wired connections both have this issue...

changing dns server to local ISP's, google's public DNS or whatever - does not help...

no other way to fix, but a complete reboot of my Mac and everything goes back to normal...

that is a big pain..I am almost about to return my new Mac if I did not see this discussion thread and knew that it is probably a OS issue rather than a hardware issue...

Unfortunately, I never could get Big Sur to load either and do to the timelines of my need of a computer, we ended up biting the bullet and buying a new Air. Hate to say this, but sometimes it feels like that's what Apple wants at the end of the day.....

I had the same error was able to mitigate for 10 minutes at a time by running

-sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder

It looks like the culprit was ipv6, after i disabled it completely my DNS issues stopped.

in terminal run:

networksetup -setv6off Wi-FI

or for cabled connection

networksetup -setv6off Ethernet