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https://16777217/

130 points| phineyes | 3 years ago |16777217.

86 comments

order

teddyh|3 years ago

  $ man 3 inet_aton

  […]

   inet_aton() converts the Internet host address cp from the IPv4
   numbers-and-dots notation into binary form (in network byte order)
   and stores it in the structure that inp points to.  inet_aton()
   returns nonzero if the address is valid, zero if not.  The address
   supplied in cp can have one of the following forms:

   a.b.c.d   Each of the four numeric parts specifies a byte  of  the
             address;  the bytes are assigned in left-to-right order
             to produce the binary address.

   a.b.c     Parts a and b specify the first two bytes of the  binary
             address.   Part c is interpreted as a 16-bit value that
             defines the rightmost two bytes of the binary address.
             This notation is  suitable  for  specifying  (outmoded)
             Class B network addresses.

   a.b       Part a specifies the first byte of the binary address.
             Part b is interpreted as a 24-bit value that defines the
             rightmost three bytes of the binary address.  This
             notation is suitable for specifying (outmoded) Class A
             network addresses.

   a         The  value  a is interpreted as a 32-bit value that is
             stored directly into the binary address without any byte
             rearrangement.

   In all of the above forms, components of the dotted address can be
   specified in decimal, octal (with a leading 0), or hexadecimal,
   with a leading 0X).  Addresses in any of these forms are
   collectively termed IPV4 numbers-and-dots notation.  The form that
   uses exactly four decimal numbers is referred to as IPv4 dotted-
   decimal notation (or sometimes: IPv4 dotted-quad notation).
— https://manpages.debian.org/stable/manpages-dev/inet_aton.3....

larschdk|3 years ago

This is just a convention from BSD, and is not even POSIX compliant. However, 'ping 1.1' is a convenient shortcut (actually pings 1.0.0.1). iproute2 and systemd do not use inet_aton and don't follow this BSD4.2 convention and instead parse it as '1.1.0.0' or not at all.

Wannabe1337|3 years ago

You can also try my tool online which obfuscate an ip address. https://wannabe1337.xyz/text-ipobfuscator

ricardobayes|3 years ago

Is there a legitimate reason why to obfuscate an ip address?

anakaine|3 years ago

You may want to be aware that your banner ad was advertising layer 4/7 most powerful services.

I'm guessing advertising ddos / stressor services.

dheera|3 years ago

> The free app that makes your Internet safer.

I don't consider anything closed source to be safe.

> 1.1.1.1 with WARP

WTF is WARP

> Your Internet service provider can see every site and app you use—even if they’re encrypted. Some providers even sell this data, or use it to target you with ads.

OK, fantastic, so instead of handing my ISP all my data, I hand it to ... you?

> the fastest DNS resolver on Earth.

I'm pretty sure that the for the 5 full seconds it takes a site like Gmail that saving 9ms on DNS isn't going to change much.

phineyes|3 years ago

Was more pointing out the numbered hostname, not the service its-self.

16777217 is just the lowest number that corresponds with a routed IP address :)

WHATDOESIT|3 years ago

> I don't consider anything closed source to be safe.

Having the source won't help you in any practical way to verify the security of this online service. The app is just a relatively simple connector to a VPN. You need to trust the service/its operator, and at that point you might as well trust that app too.

> OK, fantastic, so instead of handing my ISP all my data, I hand it to ... you?

Exactly right and fantastic indeed. You have to hand it to someone at some point. Having a choice and choosing something like Warp sounds much better than handing out my data to any random unknown ISP wherever I connect to a wifi (especially if I am visiting foreign countries with somewhat harsher network tracking laws) - and some people don't trust their home ISP too but don't have other options.

I'm happy for you that you have a trustable ISP with good opsec who won't betray you. Not everyone does.

They said "safer" not "perfectly safe".

GTP|3 years ago

Doesn't work on Firefox for Android. Edit: as noted in another comment, it works when removing the final dot.

chris_wot|3 years ago

Same with Firefox on Ubuntu

Semaphor|3 years ago

Not working in FF (Desktop stable, win)

messe|3 years ago

It doesn't work on firefox on mac either, but interestingly, if you remove the final period '.': https://16777217 works.

compsciphd|3 years ago

there's a dot at the end of the url when you click on it which breaks it

WuRB3u27qAqegA8|3 years ago

I like how variants of this have been discussed on here about 5 times in the last month.

Yes, weird formats that no one has used in about 3 decades (if they even used them then) are still supported. These include just about every way you can think of to encode a 32 bit IP address into between 1-4 groups. Cool.

graypegg|3 years ago

Did you make a new account just to complain about how you already knew something?

londons_explore|3 years ago

Warp bypassed government blocked sites in my country (the UK - which blocks RT.com as part of war efforts).

I'm not sure how long they'll be able to run such a service till the government tells them they have to implement site blocking.

sammy2255|3 years ago

The UK is fighting a losing battle. Right now they snoop SNI headers and terminate connections to banned websites. But ECH is ready to be rolled out

killingtime74|3 years ago

With the speed of bureaucracy, at least 10 years?

nly|3 years ago

I'm in the UK and RT.com loads fine.

awaisraad|3 years ago

does switching to DoH works for you?

jquery|3 years ago

Very cool, but how does it affect mobile battery life? Is this something I want turned on all the time or best used when traveling?

I want to trust cloudflare here but I am hesitant to enable a VPN on my phone at all times.

Uptrenda|3 years ago

Is there any good reason to support this notation for URLs? Do you think this format would be faster to parse than regular IPs?

OrangeMonkey|3 years ago

Its been around since like 1996 at least, likely earlier.

Its A.B.C.D with A255^3 + B255^2 + C255^1 + D255^0.

Used to get around filters a long time ago but broke as most sites host multiple domains and it needs your browsers 'hostname' it sends it as part of the request to actually return the right site/page.

blfr|3 years ago

Nah, pretty sure it's pure netops wankery. I like it though.

pGuitar|3 years ago

Firefox shows the ip address 1.0.0.1 in the "status bar" when I hover that address

drug5|3 years ago

Interesting. How is this encoded?

tirpen|3 years ago

It's just the bits of the ip number interpreted as one 32-bit integer instead of four 8-bit integers.

vimda|3 years ago

It's a decimal encoding of 0x01000001 - 1.0.0.1

OrangeMonkey|3 years ago

Its A.B.C.D with A255^3 + B255^2 + C255^1 + D255^0.

bmon|3 years ago

similarly, https://1.1

capableweb|3 years ago

Or, one character shorter: http://ai

Is this maybe the shortest (currently reachable) domain?

jarek83|3 years ago

With Warp on, youtube does not play anything for me.

worldmerge|3 years ago

How does this work?

jhugo|3 years ago

IPv4 addresses are 32-bit numbers, the dotted-decimal representation is just a common way to represent those numbers.

diimdeep|3 years ago

> ping 1.1

lol, cool

ada1981|3 years ago

What’s the diff between 1.1.1.1 and 1.0.0.1 ?

abeyer|3 years ago

0.1.1.0? :P

chrismorgan|3 years ago

1.0.0.1 is faster to write because most places will accept the spelling 1.1 (which is {u8}.{u24} formatting).

jhugo|3 years ago

They're two distinct IP addresses, but both are anycasted CloudFlare public DNS.

navigate8310|3 years ago

They are the same and redundant fallbacks to each other

Quai|3 years ago

At home, when accessing my gw, I always use "ssh foo@10.1" to access 10.0.0.1.