TCPKILL(8)

💅 tcpkill 💅

okay bestie, gather round, because this is TCPKILL(8) from the System Manager's Manual — section 8, the sysadmin section, main character energy only 👑. She's a little chaos goblin and she is so good at what she does.

🎀 NAME 🎀

tcpkill — kill TCP connections on a LAN 💀✨

like. literally that. she ends them. no cap.

🦋 SYNOPSIS 🦋

tcpkill [-i interface] [-1...9] expression

that's it. that's the whole vibe check. three little slots and a whole lot of power 🫶

🌸 DESCRIPTION 🌸

so tcpkill kills specified in-progress TCP connections. not hypothetical ones, not future ones — the ones happening right now, mid-conversation, living their best life. she pulls up and she ends them 😭

and why would you even want that, bestie? because it's useful for libnids-based applications which require a full TCP 3-whs for TCB creation. read that again. those apps need the full three-way handshake to build their TCB — so if you want them to actually see a connection, the connection has to actually complete. and if you want it gone? yeah. that's her job. periodt.

🍓 OPTIONS 🍓

• -i interface — tell her which interface to listen on 🎧 that's it, that's the whole job, she's a great listener (unlike some people, no names)
• -1...9 — the degree of brute force to use in killing a connection 💥 fast connections may require a higher number in order to land a RST in the moving receive window. the default is 3. so like, 1 is "gentle nudge, hope for the best 🌸" and 9 is "I am the storm 🌪️". if it's not landing, crank it up, she said what she said.
• expression — a tcpdump(8) filter expression that selects the connections to kill 🎯 yes, tcpdump filter syntax. you already know it. you're so smart. use it to pick your victims.

⚠️ bestie, the expression is doing a LOT of heavy lifting here — it's literally deciding which connections get ended. be sure before you swing 💀

💜 SEE ALSO 💜

• dsniff(8)
• tcpnice(8)

the whole friend group 🫂

⭐ AUTHOR ⭐

Dug Song <dugsong@monkey.org> — the icon, the blueprint, the moment 🌈

and that's the page, bestie 💖 this was TCPKILL(8) out of the System Manager's Manual — go forth, be careful, and remember: with great brute force comes great responsibility ✨🎀🦋