How do I add IPv6 address into System32\drivers\etc\hosts?

Question

There is already by default, and it works (Win 7):

::1             localhost

This also works (testing with ping):

::1             hosta

But when I'm trying to add something non-loopback, it doesn't resolve:

fe80::215:afff:fec6:ea64 realhost

So that I can do:

C:>ping fe80::215:afff:fec6:ea64
Reply from fe80::215:afff:fec6:ea64: time=2ms

But can't go with hostname that I put in hosts:

C:>ping realhost
Ping request could not find host realhost. ...

Any way to add an IPv6 address to hosts in Windows?

Yes, as you may have noticed fe80:: in it. Ping just cant find IP for realhost. — Evgenyt, Feb 12 '11 at 12:30
Hold on a moment. If you can't ping that ip address then fiddling about with hosts files isn't going to help you. — Rob Moir, Feb 12 '11 at 12:34
There's nothing stopping someone from SSHing to a remote host, reading the LL address there, and putting it in their `hosts` file. Except that won't work, because it's a LL address. — Ignacio Vazquez-Abrams, Feb 12 '11 at 12:37
I can `ping fe80::215:afff:fec6:ea64` directly. But can't `ping realhost`. This is the problem. System cannot resolve realhost using hosts record. — Evgenyt, Feb 12 '11 at 12:38
Try to specify FDQN name with hostname, e.g. fec0::fa3:2aa:ff:fe9f:2a40 webv6.central.example.com w1 — Sergey, Feb 12 '11 at 13:07

score 25 · Answer 1 · edited Sep 15 '14 at 17:01

25

Finally, I've found the way. I speicied zone ID (11 in my case) in hosts:

fe80::215:afff:fec6:ea64%11 realhost

Which I've got using

netsh interface ipv6 show addresses

With help of http://technet.microsoft.com/en-us/library/bb726995.aspx

edited Sep 15 '14 at 17:01

Oliver Vogel

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answered Feb 12 '11 at 14:05

Evgenyt

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Hey, that command... did you have to run it on the realhost machine? Asking because I got an IPv4 IP for that realhost, but we cannot connect to it and we don't even know where it's hosted. So trying to find out that %11 or similar in any other way... :S – mickael Feb 21 '18 at 23:57

Long Pham · Answer 2 · 2018-08-14T14:07:21.880

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Try like this is host file of window. Hope it can help

C:\Windows\System32\drivers\etc:

[2001:db8::10:2aa:ff:fe21:5a88] tsrvv6.wcoast.example.com

edited Aug 14 '18 at 14:07

answered Aug 13 '18 at 02:37

Long Pham

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it doesn`t work – theycallmeanother13 Mar 04 '21 at 20:34

score 4 · Answer 3 · answered Feb 12 '11 at 13:29

4

According to a Microsoft TechNet article from 2005/2006:

You should not place entries for link-local addresses in the Hosts file because you cannot specify the zone ID for those addresses. This concept is similar to using the Ping tool to ping a link-local destination without specifying the zone ID. Therefore, entries in the Hosts file are useful only for global or site-local IPv6 addresses.

http://technet.microsoft.com/en-us/library/bb727005.aspx

answered Feb 12 '11 at 13:29

joeqwerty

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If I put what they do `2001:db8::10:2aa:ff:fe21:5a88 tsrvv6.wcoast.example.com ts1`. It doesn't get resolved when I try to `ping tsrvv6.wcoast.example.com`. Does it work for you? – Evgenyt Feb 12 '11 at 13:58

score 1 · Answer 4 · answered Feb 12 '11 at 13:45

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I don't have Win7 nearby so can't test it, but I got caught by the hosts.sam file once. Windows Explorer will hide extensions by default, so I spent a day editing the "hosts" file but it was actually the hosts.sam file. Make sure you are editing the real hosts file.

And antispyware programs will block changes to the hosts file. Malware will add hosts entries to redirect bank websites to fake sites.

Adding ipv6 addresses to the hosts file does work on W2K8, I did it last week.

answered Feb 12 '11 at 13:45

jqa

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The hosts.sam file is the real hosts file. You need to remove the .sam extension when you use it. The same goes for the lmhosts.sam file. – joeqwerty Feb 12 '11 at 14:17
maybe on some systems. usually i've seen a hosts file and a hosts.sam file. But i'm usually fixing other people's boxes. – jqa Feb 12 '11 at 18:46
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".sam" is ".sample" in 8.3 dos compatible file names :-) – MarkusSchaber Apr 24 '18 at 06:43

How do I add IPv6 address into System32\drivers\etc\hosts?

4 Answers4