toobigsniff6(8)

📦
version 3.8 · 7 versions
, in epel 9

🎀 NAME 🎀

toobigsniff6 — ok so this is the IPv6-flavoured tool (yep, section 8 of the IPv6 manual, she's that girl) that sniffs packets and claps back with an ICMPv6 "too big" error 💅

✨ SYNOPSIS ✨

toobigsniff6 [-c] interface target mtu

🦋 DESCRIPTION 🦋

Okay bestie, here's the whole vibe: toobigsniff6 sniffs for packets coming from target, and then — based on that packet — it sends out an ICMPv6 too big error message, with the MTU you specified. Like it literally tells the other side "girl your packet is too big" 🔥

So the sniffing happens, then the clapback gets sent, and the MTU you hand it is the MTU that goes into that error message. Iconic behaviour, no cap.

Now the two little extras that change everything:

  • If you supply a '*' as the address, literally any global traffic that gets sniffed will be used — not just one specific target's. Kind of a "catch whatever floats by" situation 🌈
  • If you supply the -c option, the tool will not quit on the first packet match — instead it keeps running and keeps sending packets until you abort it. Main character energy, she does not stop 💀

👑 OPTIONS 👑

  • -c — the "don't quit on the first match" flag. With this, toobigsniff6 keeps running and keeps sending packets until it gets aborted, instead of bailing out the moment it hits a packet match. She stays. Periodt 💖

Also worth calling out (the positions matter!): the arguments are interface, target and mtu, and in target you can drop a '*' as the address so any sniffed global traffic gets used 🫶

⚠️ Heads up bestie: the abort is you aborting it. With -c she runs until you stop her, so don't just walk away and forget she's out there sending packets 😭

🌸 AUTHOR 🌸

thc-ipv6 was written by van Hauser <vh@thc.org> / THC — a whole legend, honestly 👑

The homepage for this toolkit is: https://github.com/vanhauser-thc/thc-ipv6 — go stan 🦋

toobigsniff6 3.8 (c) 2020 by van Hauser / THC <vh@thc.org> www.github.com/vanhauser-thc/thc-ipv6

💖 and that's the whole page bestie 💖 — sign-off time: this gorgeous thing is THC, dated 2022-06-19, and she's toobigsniff6(8), section 8, IPv6 manual, mwah 💅🎀

📦 where this page comes from