Questions tagged [firewall]
Typically software that runs to prevent network traffic from reaching a computer. Also a hardware device that works on a network level rather than running on a single computer.
369 questions
0 votes
2 answers
102 views
Why is macOS Tahoe firewall suddenly blocking all network access?
macOS 26.1 (Tahoe), M4 MacBook Pro Yesterday, I rebooted my MacBook and suddenly found that I had no network access, LAN or otherwise. Pinging 8.8.8.8 (or my router) gives No route to host -- no ...
- 416
0 votes
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33 views
Local network access blocked for allowed application
On MacOS 15.6.1 (issue happened with older versions too) Unreal Engine 5 uses UDP to communicate with other applications on the local network. For UE 5.4, adding the applications to the allowed list ...
- 103
0 votes
0 answers
51 views
Lost Access to Internet After Turning on PF Firewall
I followed the following guide: https://iyanmv.medium.com/setting-up-correctly-packet-filter-pf-firewall-on-any-macos-from-sierra-to-big-sur-47e70e062a0e to set up my firewall on my Mac. Problem is, ...
- 65
0 votes
0 answers
128 views
Prevent using other DNS from Android emulator
I'm on a 2021 MacBook Pro with Sequoia 15.3.2 and some of my settings (DNS, Firewall) are set with a profile by the company I work for. Sometimes I share this MacBook to a user for which I've created ...
- 1
1 vote
1 answer
391 views
Why the pf firewall (pfctl) is enabled after power on on my mac?
I'm using macos 15.3.2, and I haven't changed /System/Library/LaunchDaemons/com.apple.pfctl.plist on my Mac, its content is <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http:...
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0 votes
0 answers
82 views
Sonoma: Permanently allow Python to open a server port?
Recently starting a python process that opens a server port always triggers the Firewall dialog Do you want allow that Python.app can accept incoming network connections? (translated) As the system ...
- 221
2 votes
2 answers
1k views
"no route to host" for certain applications from MacOS host to MacOS guest
I'm running a MacOS VM (VMWare Fusion) on a MacOS host. The guest has a VM-assigned NAT IP address. Both guest and host on MacOS 15.2 (Sequoia). I'm encountering a strange issue: I can ping, nc, or ...
- 71
1 vote
1 answer
777 views
Cannot connect to mosh(-server), getting error "mosh: Nothing received from server on UDP port 60000"
I'm struggling with getting brew-installed mosh-server to work on my new M2 Mac Mini. The issue is that macOS seems to block the incoming UDP connection from the client: mosh: Nothing received from ...
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