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Forum Discussion
strykerzr350
Apr 03, 2026Guide
Why is Xfinity blocking access to the spectrum analyzers?
Copied from a reddit discussion on the unofficial Comcast page. Could not get a definite answer. Recently discovered that port 8080 buy doing a port scan of the modems log in IP that Comcast is b...
FURRYe38
Apr 04, 2026Guru - Experienced User
It's accessible for me on my CM3000 with Sparklight:
strykerzr350
Apr 05, 2026Guide
I wonder why Xfinity blocks it? However I have seen some people reports that they can see it with an Arris SB8200 modem.
I tested this with my old Netgear CM1000 and its blocked on it as well.
- FURRYe38Apr 06, 2026Guru - Experienced User
Post up the cable connections data page then the Event Logs data page so we can see what maybe happening there.
How are you trying to access the spectrum analyzer web page?
Tried different browsers?Was told the the analyzer is supported by your ISP. Supposed to be there.