Internet issues on Monterey

Just wondering if other people facing this problem on 12.2.1 have any kind of network filter installed? I have found that Cisco Anyconnect Socket Filter DNS proxy is what seems to cause me problems. I need to disable that in the System Preferences->Network panel (Set Service Inactive, Apply).

I had this same problem with an update with Monterey 12.2.1. I allowed the update to come through overnight and in the morning no internet access. Following the messages below about 3rd party software, I uninstalled my Norton 360, and internet access was restored.

I have a similar problem; DNS queries on Monterey periodiically fail on "POSSIBLE_DNS_PROBE" (on Chrome) with similar errors on other browsers and "SERVFAIL" on dns queries using "dig". The problem does not occur with queries directed to a local DNS server. It does happen using multiple ISP's.

I'm usually able to resolve the issue and restore DNS access by flushing the cashe. The command I use is:

"sudo killall -HUP mDNSResponder" (in a terminal window).

I’m new here so apologies for any errors!!

I started getting problems with Monterey 12.2.1 2 weeks ago. Webpage loading would hang or halt, eventually showing a message saying I wasn’t connected to the internet. I restarted the router and Mac with no change. The vendor suggested I shouldn’t have upgraded from Big Sur; he may have a point. He also suggested I try hardware reset (unplugging the power cord for 30mins) and an NVRAM reset. Not sure which worked but connectivity is now OK but it’s only a few hours since resets.

What causes these issues?

The problem hasn't gotten worse for me in 12.3. However, I continue to need to disable the DNS proxy for Cisco's AnyConnect VPN client, which I use for work. I have to disable it every time I restart.

There may be multiple paths to the issue. I do not run CISCO software, but I still get corrupt DNS Cache structures multiple times an hour. I'm running a cron job that flushes the cache every 30 seconds, essentially disabling the local cache, in order to keep my access working.

sudo killall -HUP mDNSResponder

sudo killall mDNSResponderHelper

sudo dnscacheutil -flushcache

macOS 12.2.1. I have not pushed 12.3 to my hosts yet. Happens with multiple ISP's in multiple locations. My High Sierra 32-bit dev box has no issues...

Here's a blurb on it from Cisco AnyConnect client release notes:

DNS (Name Resolution) on macOS 12.x May Fail

Those running AnyConnect on macOS 12.x may experience a loss of DNS (name resolution), requiring a reboot for restoration. The cause has been identified as a macOS bug, which is being addressed in macOS 12.3 (FB9803355). Upon upgrade to macOS 12.3, the issue will no longer occur.

Taken from here:

https://www.cisco.com/c/en/us/td/docs/security/vpn_client/anyconnect/anyconnect410/release/notes/release-notes-anyconnect-4-10.html#Cisco_Reference.dita_a0e4aed2-99c2-4189-a6ae-bd740e706c98

My symptoms have been a bit different. Every now and then (a few times per day?) my internet connection just stops working for 30 seconds or a minute, and then it comes back. I have a WiFi monitor running and it shows a steady connection at that level, so I was suspecting my ISP. But now I wonder if it's local to my Mac which is running Cisco AnyConnect. I'm on MacOS 12.3 and the problem hasn't gone away yet. So I wonder whether it's the same basic problem or something altogether different...

I am using latest Cisco AnyConnect VPN and noticed that upon applying macOS 12.3 update, there have been some issues with handling VPN split tunnel and domain suffix mapping. Local DNS and access works without issue, when connecting to VPN, a local ping or Browser URL do not resolve, however, if you use DIG command or NSLOOKUP command they work.

Discovered macOS is receiving the updated DNS Server and Domain suffix and it's appearing alongside the local entires, but it's no longer mapping the domain suffix correctly and directing traffic through the tunnel properly. Had to override with entries in the local /etc/hosts file temporarily as I need to use this for connecting to work.

Discovered the problem occurs on both M1 Max and Intel based Mac systems using 12.3 update. When the system was running on older version such as 12.1, 12.2.x, was not having any issue and version of the Cisco AnyConnect VPN has remained the latest in all conditions. Starting to believe it's something with macOS Monterey update and not the Cisco AnyConnect VPN as if I run from an earlier version of 12.x - VPN works fine.

This is definitely a problem. I had Lanscan installed. Today (5 times) I scanned the network. After listing the devices, the beachball appeared. Lanscan could not be force-quit. At this point the network was lost - connected servers dropped, web browsing dead. Could not reboot - had to force a hard shutdown.

After removing Lanscan, I resumed an online course. 6 times during a 2 hour period, the ethernet vanished. Again, local servers dropped, no browsing, no ping. Had to reboot to recover operation.

I never had this problem before the latest Monterey 12.3.1 update.

Apple has definitely broken something and it's making the machine almost unusable.

If it was a real computer, and not an appliance, I would just load up Fedora and be done with this nonsense but, as it is, I'm stuck with it. It's a MBP 2016 and it's pretty obvious why it is worth so little in trade on a newer model. Who would want something as afflicted as this.

It cam with Mojave but things reached a point where an upgrade was unavoidable. There is no way to revert to Mojave. They have done something to the Mojave installer that prevents it from running now - just says the installer app is damaged (or something like that).

Since this thread has been running for a long time how, and it's pretty clear that many are experiencing similar problems, the only constant factor is the fact that Mac Monterey is behind it all. It seems almost certain that it is the culprit.

I won't bother calling Apple Care (but that's another story for a different time)

Here is an update - Developers at Apple are getting there slowly - Each subsequent release is getting slightly better in how it handles items such as DNS, USBC ports and the USBC -> Wired Ethernet adapters, etc.

The latest update seems to have straightened out a few of the items but still several annoyances causing me to have to stay tethered to Wi-Fi as this seems stable. For a company of their size, there should have been substantially more real world testing in their Labs to shake problems like this out. I am a professional trying to use these tools daily and expect higher quality from a company this size.

I have requested to provide debugging captures so we can give their developers what is needed to solve these conditions/problems but I get little to no feedback. There are clearly some driver/OS related issues in how they are handling and processing Thunderbolt/USBC ports and managing the protocol stacks and connectivity. I have had scenarios by just unplugging an iPhone from a USBC-Lightning cable, kicks macOS and it somehow resolves items that were stuck.

I am experiencing the same problem with 12.3.1 - after a few hours the dns just stops working.

Interesting observation - yesterday this happened during a Zoom meeting. The Zoom was running fine - video/audio/screen sharing - but I was unable to ping or open any web site or IP.

I am using GlobalProtect VPN 5.2.10-6 which is compatible with Monterey. If I disable it, I manage to work for more than a day without restart.

Just happened again. I tried the following suggestions given earlier:

1) check the number of UDP sockets

netstat -an | grep -e tcp -e udp | wc -l

returned 167 - very small number

2) flush cache and kill mDNSResponder

sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder

Again - no luck.

3) Disabled IPv6 earlier today

networksetup -setv6off Wi-FI 

It didn't help at all.

4) Added earlier new network location "Home" (system Preferences > Network > Location).

When the problem happen I tried to switch between Automatic and Home.

Again - doesn't help.

The only thing that helps is restart. :(

Guess what I did this update last week and almost every App I use is giving me silent offline issues. Slack, Outlook, Teams and even browsers. This is literally affecting my productivity!

I am on 12.3.1. M1 Macbook Pro! This is really weird.

Just got a new M1Max MBP running 12.3.1 and this is still an issue. I need to toggle the WiFi off and on to clear the issue - sometimes as often as every few minutes.

My first new Mac in 11 years (I run an early 2011 MBP with no issues) and I'm close to returning it. :(