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computers / comp.os.linux.networking / Re: what does "::ffff" mean in netstat output?

Re: what does "::ffff" mean in netstat output?

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Date: Fri, 16 Sep 2022 17:42:06 -0700 (PDT)
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Subject: Re: what does "::ffff" mean in netstat output?
From: rayleenrios17@gmail.com (Rayleen rios)
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by: Rayleen rios - Sat, 17 Sep 2022 00:42 UTC

On Thursday, January 28, 2010 at 5:50:21 AM UTC-6, Pascal Hambourg wrote:
> Hello,
> Rick Jones a ï¿œcrit :
> > Bennett Haselton <ben...@peacefire.org> wrote:
> >> When I run "netstat" on my machine I get some lines like:
> >
> >> tcp 0 0 ::ffff:69.72.177.140:80 ::ffff:<remote ip
> >> address> TIME_WAIT
> >
> > ::ffff is the IPv6 prefix for an IPv4 address mapped into IPv6 space
> > (something along those lines).
> And it means that it is an IPv6 socket that is used for IPv4
> communication. Application and socket-wise, it is IPv6 but network and
> packet-wise it is IPv4. This is allowed as a transition mechanism if
> net.ipv6.bindv6only=0 and the application didn't set the socket option
> IPV6_V6ONLY.
> It seems that some recent OSes disable this option by default so that
> IPv6 sockets can handle only real IPv6 communications.
TjddidododuddmdodpodydmdkdddodydmdldpdReeryiln😋😎😂😁😁😃🐒🐯🐶🐅🍈🍑🍉Happy birthday to you melodia Makes all also Susan xoxo

Subject	Author
Re: what does "::ffff" mean in netstat output?	Rayleen rios