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1. Embed this notice
   Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Wednesday, 23-Apr-2025 19:58:25 JST Ryan Castellucci :nonbinary_flag:

   Coworker: ...and the IP address are compared with a string match.
   Me: grinning manically
   Coworker: Why are you looking at me like that?
   Me: Open up a terminal and type ping 4.2.514 and hit enter.
   Coworker: ...what's the fourth number?
   Me: grin widens Just hit enter.
   Coworker: WTF!?

   • Haelwenn /элвэн/ :triskell:, LukeAlmighty 🇨🇿 and Polychrome :blabcat: and 2 others like this.
   • Embed this notice
     CatSalad🐈🥗 (D.Burch) :blobcatrainbow: (catsalad@infosec.exchange)'s status on Wednesday, 23-Apr-2025 20:50:54 JST CatSalad🐈🥗 (D.Burch) :blobcatrainbow:

     in reply to

     @ryanc WTF!? I knew you could ping a decimal like 2130706433, but a hybrid? How has this cursed knowledge evaded me so far?

   • Embed this notice
     Jay (jws@infosec.exchange)'s status on Wednesday, 23-Apr-2025 20:57:05 JST Jay

     in reply to

     @ryanc That never occurred to me to try, and yet here we are:

     jay@marvin:~$ ping 4.131586
     PING 4.131586 (4.2.2.2) 56(84) bytes of data.
     64 bytes from 4.2.2.2: icmp_seq=1 ttl=56 time=17.8 ms

   • Embed this notice
     David Schuetz (darthnull@infosec.exchange)'s status on Wednesday, 23-Apr-2025 21:07:54 JST David Schuetz

     in reply to

     @ryanc I once had a subnet where all the hosts used movie names. Remotely connecting to “2001” was a real pain.

   • Embed this notice
     BeyondMachines :verified: (beyondmachines1@infosec.exchange)'s status on Wednesday, 23-Apr-2025 22:23:09 JST BeyondMachines :verified:

     in reply to

     @ryanc why not `ping 134744072`

   • Embed this notice
     Jernej Simončič � (jernej__s@infosec.exchange)'s status on Wednesday, 23-Apr-2025 22:57:28 JST Jernej Simončič �

     in reply to

     @ryanc This will probably blow a few people's minds:
     ping 172.16.255.5
     ping 2886795013
     ping 0xac10ff05
     ping 025404177405
     ping 172.16.65285
     ping 172.16.0xff05
     ping 172.16.0177405
     And don't forget to mix & match:
     ping 172.0x10.0177405

     (and yes, these all work on Linux and Windows at least)

   • Embed this notice
     Z̈oé ⛵ (uint8_t@chaos.social)'s status on Wednesday, 23-Apr-2025 23:29:27 JST Z̈oé ⛵

     • Infoseepage

     @Infoseepage @ryanc see also: ping 192.1

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 24-Apr-2025 01:22:33 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • Gabe

     @gabe I did, lol.

   • Embed this notice
     Gabe (gabe@mendeddrum.org)'s status on Thursday, 24-Apr-2025 01:22:43 JST Gabe

     in reply to

     @ryanc now show them
     ping 4.2.01002
     For extra lulz

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 24-Apr-2025 01:51:16 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • dakkar
     • Yossi

     @yossi@techhub.social @dakkar technically, . is a valid hostname

   • Embed this notice
     Yossi (_yossi_@techhub.social)'s status on Thursday, 24-Apr-2025 01:51:20 JST Yossi

     in reply to

     • dakkar

     @dakkar @ryanc cloudflare can make the best url shortner by putting it on 1.0.0.1

     You can't get shorter than https://1.1/whatever

   • Embed this notice
     dakkar (dakkar@s.thenautilus.net)'s status on Thursday, 24-Apr-2025 01:51:23 JST dakkar

     in reply to

     @ryanc@infosec.exchange I should start using 127.1 or even 2130706433 and see how much stuff gets very confused 😁

   • Embed this notice
     Paul_IPv6 (paul_ipv6@infosec.exchange)'s status on Thursday, 24-Apr-2025 01:59:11 JST Paul_IPv6

     in reply to

     @ryanc

     IP addr parsing code is total nutso stuff. ;)

   • Embed this notice
     mathew (lpar@infosec.exchange)'s status on Thursday, 24-Apr-2025 04:59:16 JST mathew

     in reply to

     @ryanc Don't forget to tell them about IPv6 address abbreviation.

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 24-Apr-2025 05:21:29 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • Graham Sutherland / Polynomial

     @gsuberland enbies just want one thing and it's disgusting

   • Embed this notice
     Graham Sutherland / Polynomial (gsuberland@chaos.social)'s status on Thursday, 24-Apr-2025 05:21:30 JST Graham Sutherland / Polynomial

     in reply to

     @ryanc *undots ur quad*

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 24-Apr-2025 15:26:59 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     If this ends up being my most popular fedi post ever I'm gonna be upset.

   • Embed this notice
     Clifford Guillaume (cguillaume@infosec.exchange)'s status on Thursday, 24-Apr-2025 21:50:43 JST Clifford Guillaume

     in reply to

     @ryanc 4.2.514 is not an IPV4 address. An IPV4 address is composed of 32 bits pre-described using the dotted-interval concept, which requires a period between each group of eight (8) bits. Ex:
     Format:
     xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx
     8 bits 8bits 8bits 8bits = 32bits
     1 Byte 1 Byte 1 Byte 1 Byte = 4 Bytes
     Examples of addresses:
     192.168.10.4
     200.29.67.4
     10.10.10.2
     8.8.8.8
     4.4.4.4

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 24-Apr-2025 21:58:06 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     @CGuillaume and yet pinging it works 🤔

   • Embed this notice
     Clifford Guillaume (cguillaume@infosec.exchange)'s status on Thursday, 24-Apr-2025 22:01:11 JST Clifford Guillaume

     in reply to

     @ryanc Unless 4.2.514 is an alias name (CNAME) that represents an IP address.

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 24-Apr-2025 22:05:37 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • Clifford Guillaume

     @CGuillaume Read the documentation for inet_aton.

     This format, cursed as it may be, is widely supported.

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Thursday, 24-Apr-2025 22:06:47 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • Clifford Guillaume

     @CGuillaume Thank you for the gender validation. 🤣

   • Embed this notice
     Clifford Guillaume (cguillaume@infosec.exchange)'s status on Thursday, 24-Apr-2025 22:08:13 JST Clifford Guillaume

     in reply to

     @ryanc cool 👍

   • Embed this notice
     Clifford Guillaume (cguillaume@infosec.exchange)'s status on Thursday, 24-Apr-2025 22:17:21 JST Clifford Guillaume

     in reply to

     @ryanc
     What was exactly the problem ?

   • Embed this notice
     Jay (jws@infosec.exchange)'s status on Thursday, 24-Apr-2025 22:53:07 JST Jay

     in reply to

     @ryanc relevant deep dive: https://blog.dave.tf/post/ip-addr-parsing/

   • Embed this notice
     Ryan Castellucci :nonbinary_flag: (ryanc@infosec.exchange)'s status on Friday, 25-Apr-2025 00:23:12 JST Ryan Castellucci :nonbinary_flag:

     in reply to

     • Oliver Blanthorn

     @bovine3dom 😱

   • Embed this notice
     Oliver Blanthorn (bovine3dom@masto.ai)'s status on Friday, 25-Apr-2025 00:23:13 JST Oliver Blanthorn

     in reply to

     @ryanc we ran into this in Tridactyl a few months ago when a user was trying to search for "538" https://github.com/tridactyl/tridactyl/issues/5081