Freeware · Since 2000 · 100,000+ downloads
Tweak every TCP/IP setting Windows exposes.
CableNut is the classic broadband tuner for Windows 95 through XP. Load a ready-made profile for Cable, DSL, Satellite or Dialup, or hand-tune nearly every TCP/IP and AFD registry value yourself.
v4.08 · 823 KB · Windows 95/98/ME/NT/2000/XP
For Windows 95–XP only. Windows Vista and later tune TCP automatically, so please don’t run CableNut on modern Windows. Use a retro PC or a 98/XP virtual machine.
AS SEEN ON · TechTV’s The Screen Savers · PC Magazine · LangaList · Lockergnome · Softpedia “100% Clean”
Everything under the hood
Built by broadband nerds for broadband nerds, back when getting the speed you paid for meant editing the registry.
Every parameter
Direct access to nearly every TCP/IP and AFD registry value: receive windows, RFC 1323 options, SACK, TTL, buffer sizes and more.
Custom Setting files
Load a ready-made .ccs profile for Cable, DSL, Satellite or Dialup, or save your own and share it with other CableNut users.
Safe to experiment
Built-in registry backup and restore, automatic OS detection and a one-click “Delete CableNut Tweaks” button to put things back.
By far, the best ISP optimizer I’ve ever found is Cablenut. You’d be nuts not to run this bad boy.
The Screen Savers, TechTV
Stories
Free web hosts, the 2001 benchmark, TechTV, PC Magazine and life on the broadband forums.
From the archive
Rick’s original 2001 guide to MTU and MSS, restored with the rest of the old articles.
News
CableNut.com is back, 25 years later: what’s new on the relaunched site.
Preserved for the retro crowd
Windows Vista and later tune TCP automatically, so CableNut’s work is done on modern PCs. It lives on here for Windows 98 and XP builds, virtual machines, and anyone curious how broadband tuning worked in the early 2000s.
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