• FauxPseudo @lemmy.world
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    1 year ago

    Ok. This covers every ipv6 and ipv4 address.

    “^\s*((([0-9A-Fa-f]1,4}:){7}([0-9A-Fa-f]{1,4}:))|(([0-9A-Fa-f]{1,4:)6}(:[0-9A-Fa-f]{1,4}((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3)|:))|(([0-9A-Fa-f]1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2}):((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3)|:))|(([0-9A-Fa-f]1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})((:[0-9A-Fa-f]{1,4)?:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9]))3})):))|(([0-9A-Fa-f]{1,4:)3}(((:[0-9A-Fa-f]{1,4}){1,4})((:[0-9A-Fa-f]{1,4)0,2}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:))|(([0-9A-Fa-f]1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})((:[0-9A-Fa-f]{1,4)0,3}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:))|(([0-9A-Fa-f]1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})((:[0-9A-Fa-f]{1,4)0,4}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:))|(:(((:[0-9A-Fa-f]1,4}){1,7})((:[0-9A-Fa-f]{1,4)0,5}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:)))(%.+)?\s*$”

    • Mr_Dr_Oink@lemmy.world
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      1 year ago

      Remember, when we abbreviate an ipv6 address all leading zeros are reduced to a single 0.

      E.g

      0003 would just become 03

      When there are geoups of 4 zeros these can be represented as a single 0 or as a double colon ::

      But we can only use the :: once so when summarizing an address containing multiple groups of 4 0s one after the other they can all be abbreviated to a single ::

      Eg

      fe80:0000:0000:0000:0210:5aff:feaa:20a2 would become fe80::210:5aff:feaa:20a2

      Therefore it is perfectly valid to abbreviate an address of 0000:0000:0000:0000:0000:0000:0000:0000 /0 to just ::/0

      • Static_Rocket@lemmy.world
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        1 year ago

        Eh, I’ve seen some software internally prefer 0::0 instead of just ::0 or :: . Notation wise though you are correct, it is unnecessary.

      • Mr_Dr_Oink@lemmy.world
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        1 year ago

        Its CIDR notation. So /0 means the subnet mask has no on bits and would read as 0.0.0 0 if you had a /1 that turns 1 bit on in the subnet mask, so it would be 128.0.0.0.

        If i had a /24 which is the subnet mask used for most small networks like your home router. There would be 255 minus 2 addresses available for clients (phones, pcs etc) so the subnet mask would have 24 on bits and read 255.255.255.0, which you may be familiar with.

        (Assuming you dont know much, not to insult you, you might know plenty), but when writing any kind of instructions or guides, i was always told to assume the reader knows absolutely nothing and miss nothing out.

  • dan@upvote.au
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    1 year ago

    This reminds me of something I saw online maybe 20 years ago now. Someone created a torrent with a name like “every IP address ever (hacking tool)” and uploaded it to Suprnova, which ended up having thousands of people seeding it. It was just a text file with every IPv4 from 0.0.0.0 to 255.255.255.255 😂

      • spuncertv@iusearchlinux.fyi
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        1 year ago

        That file would be ungodly large. There are 2^128 possible addresses, each weighing in at 128 bits, 16 bytes. 16 bytes times 340 trillion trillion trillion. That puts us around 5.44 trillion Zettabytes. The estimates I’ve seen for worldwide data storage sit aroun 60-70 zettabytes.

      • dan@upvote.au
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        1 year ago

        IPv6 version is just a Python script that generates random 128-bit integers. Eventually you’ll hit a valid IPv6 address!

  • doctorcrimson@lemmy.today
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    1 year ago

    ipv4 [0,255].[0,255].[0,255].[0,255]

    ipv6 [0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]:[0000,ffff]