I can't recall when this started happening but it was probably after a Mac OS Big Sur update many moons ago. I'm currently on 11.2.3 (20D91) and latest Parallels version. Basically, I was previously using Bridged Network just fine. I do web development and app development so the Windows VM serves up the web site and services my app connects to. All that was working just fine then it broke. What I noticed was that on the Windows VM I couldn't get to any websites and the ones that I could get to had content errors. When I inspected the network communications via Chrome or Edge "inspect" feature showed a bunch of SSL errors. My antivirus also couldn't download and install updates. When I switched to "Shared Network" I can use my Windows VM as expected other than being able to connect mobile devices to it, so that doesn't seem to be a feasible solution. I appreciate any help anyone can offer.
SSL errors using Bridged Network
- Thread starter MNG
- Start date
This is the error I get. I also ran all the commands under the "Network troubleshooting on your device"
https://support.microsoft.com/en-us...-windows-9424a1f7-6a3b-65a6-4d78-7f07eee84d2c
ParallelsU3
Bit poster
I had exaclty the same issue - any fix is welcome!
Elric
Parallels Team
Hi,
Please try the following:
Start the /Applications/Utilities/Terminal.app and execute the following command (without wuotes). Note, it will ask for password:
"sudo sysctl net.link.bridge.segmentation=0"
If this helps, then it is an identified issue that is fixed in upcoming macOS Monterey
Please try the following:
Start the /Applications/Utilities/Terminal.app and execute the following command (without wuotes). Note, it will ask for password:
"sudo sysctl net.link.bridge.segmentation=0"
If this helps, then it is an identified issue that is fixed in upcoming macOS Monterey
Elric, thanks for the reply. That worked!
After upgrading from Catalina to Big Sur (11.5.2), I'm seeing an issue very similar to the original poster (I'm also using Bridged Network mode - with Wifi in my case) - I have a lot of content errors and my console is full of ERR_SSL_PROTOCOL_ERROR errors on my Windows 10 vm and I have to refresh a page multiple times to get it to load correctly. I'm using the latest Parallels (17.0.1). I tried the fix noted here with no luck (and that setting is changed back to 1 after I restart my host Mac). Any other ideas?
As an update, I was able to get my bridged network setup working by flipping the net.link.bridge.segmentation setting to 0 as mentioned by Elric AND ALSO changing my network adapter in Parallels from Intel PRO/1000 MT to Realtek. I'm not sure if there is an incompatibility with the Intel adapter or if just making the adapter change prompted Parallels to update some config that a restart of my vm did not. I'm happy to have it working but also concerned about this as a fix until Monterey is out of preview and early release.
Wish this worked for me. PD 17.0.1, macOS 11.6. Changed net.link.bridge.segmentation=0, changed network adapter to Realtek. I get an internet connection with bridged network, but get a ton of timeouts and it's unusable. Extremely frustrating since bridged network is essential for my work, one of the main reasons I use a VM.
Elric
Parallels Team
> changed network adapter to Realtek
No need to switch to Realtek, this doesn't affect the issue. Better switch back to virtio. Please let me know in direct message if you have problems even with virtio adapter and net.link.bridge.segmentation=0 configured, we could investigate this in direct message.