CNCMAN is a small script designed for changing the TTL (Time To Live) value on your device. It is provided in two versions:
cncman.shfor Linuxcncman.batfor Windows
The script changes the TTL value to 65 by default.
If you search around Reddit and similar forums, you’ll notice a recurring question: “Why does everyone set TTL to 65?”
There are a few practical reasons why this value is commonly used:
- Most desktop operating systems use 64 as the default TTL
- Mobile networks often decrease TTL by 1 when traffic is forwarded or tethered
- When your traffic goes through a phone or hotspot, TTL becomes 63, which can be used by ISPs to detect tethering
- By setting TTL to 65, the value drops to 64 after one hop, which looks like normal device traffic
- This avoids obvious TTL-based heuristics used by some providers to distinguish phones from PCs or routers
The TTL value is hardcoded near the top of the script, on purpose, so it’s easy to find and change.
-
In
cncman.sh, look for:TTL=65
-
In
cncman.bat, look for:set TTL=65
You are absolutely free to:
- change the TTL value
- rewrite the logic
- simplify it
- complicate it
- fork it
- publish your own version
- or roast mine and explain why yours is better
This script is intentionally simple so you can see exactly what it does without guessing.
git clone https://github.com/24stefan/cncman.git
cd cncman
chmod +x ./cncman.sh
./cncman.shgit clone https://github.com/24stefan/cncman.gitNavigate to the cncman directory and run cncman.bat as Administrator.
- Administrator/root privileges are required on both platforms
- On Linux, the TTL change is not persistent after reboot unless you modify
sysctlconfiguration manually - This script does exactly one thing and tries not to be clever about it
If it breaks on your system, that’s useful information. If it works, feel free to improve it or make fun of it.