Apple services
guzzoni.apple.com
guzzoni.apple.com is the Apple host that Apple lists for “Siri and dictation requests”, on port 443, for iOS, iPadOS, macOS and visionOS.
Short answer
Apple's host for Siri and dictation requests.
Safe to block
Safe to block if you don't use Siri or server dictation. It's cleaner to turn Siri off in System Settings.
- Matches
guzzoni.apple.com
A name with *. covers every name under it: *.push.apple.com matches 1-courier.push.apple.com.
What it serves
Apple's enterprise host list names guzzoni.apple.com in its Apple Intelligence, Siri, and Search section. Apple says that devices must reach it to process Siri requests, including dictation.
On a Mac, the Siri daemon is assistantd, so its connections here are Siri or dictation requests.
Apple doesn't document which Siri requests stay on the Mac.
Processes that use it
What breaks if you block it
Safe to block
Safe to block if you don't use Siri or server dictation. It's cleaner to turn Siri off in System Settings.
What breaks if you block it
- Siri requests that need Apple's servers fail.
- Dictation that uses Apple's servers fails.
With Kilobat Pro and the network filter, you can block a host for every app or for one app: in Connections, select a connection and choose Block. Apple’s own services are never blocked by Kilobat’s Protection lists.
Apple’s rules for its hosts
Apple’s list, Use Apple products on enterprise networks, says that devices open these connections, not Apple’s servers. Apple services fail any connection that uses HTTPS interception, so a proxy that inspects TLS should leave Apple’s hosts alone.
If a firewall allows hosts by name, allowing *.apple.com covers most Apple services, Apple says. A firewall that works only with addresses can allow 17.0.0.0/8 for IPv4, and 2403:300::/32, 2620:149::/32 and 2a01:b740::/32 for IPv6.
To see which app on your Mac opened a connection to this host, use Kilobat’s Connections tab, or the agent network log for AI agents.
Sources
- Apple Support: Use Apple products on enterprise networks
- assistantd(8), man page installed with macOS 27.2
Checked on 1 November 2026.