how to access router with IPv6 address?

Question

recently I tried to access my router's setting via 192.168.0.1 (manual said so) as usualy, however, thing is that a year ago I have switched from ipv4 to ipv6 and now ipconfig shows me this:

Windows IP Configuration
Connection-specific DNS Suffix . :
IPv6 Address . . . . . . . . . . : 2a0b:c230:35:204c::7a6
IPv6 Address . . . . . . . . . . : 2a0b:c230:35:204c:7848:3d7f:eefa:cf6a
Temporary IPv6 . . . . . . . . . : 2a0b:c230:35:204c:b89a:cd19:a7bf:d047
Link-local IPv6 Address  . . . . : fe80::7848:3d7f:eefa:cf6a%10
IPv4 Address . . . . . . . . . . : 10.10.10.100
Subnet Mask  . . . . . . . . . . : 255.255.255.0
Deafult Gateway  . . . . . . . . : fe80::297a:3cfd:fee5:3326%10

Tunel adapter isatap. <88B01E15-86779-405V-9R1C-3DF84635C612>:
Media State  . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

Tunel adapter Local connection* 2:
Media State  . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :

so the question is: how can I access my router ?

I tried:

http://[fe80::297a:3cfd:fee5:3326%10]/:8080

http://[fe80::297a:3cfd:fee5:3326%10]/

[fe80::297a:3cfd:fee5:3326%10]

fe80::297a:3cfd:fee5:3326%10

fe80::3326%10

192.168.0.1

etc..

I am with latest Chrome browser & TP-Link (TL-WR 841 ND) router (which is integrated in the wall - lol, dont ask me why)

Answer 1

The default gateway for an IPv6 will show up as a link-local address (fe80::) used for router advertisements and IPv6 auto configuration. It is a valid address but its not routable. Meaning only your link can get to it. But it otherwise usable. Therefor:

http://[fe80::297a:3cfd:fee5:3326]/

Should work. You need the [] when using IPv6 in a URL.

Just like you do in IPv4 you can also take the address allocated to your computer you take the last segment and change it to the lowest network IP usually 1 except with IPv6 there's no subnet mask just the routing prefix:

2a0b:c230:35:204c::7a6 -> 2a0b:c230:35:204c::1

So http://[2a0b:c230:35:204c::1]

Would also work. IPv6 also has zones which are indicated with % symbols which are used to indicate which interface to use and in urls they must be percent encoded in a URL with %25. But that isn't going to help you since most browsers don't handle them correctly and they aren't needed here.

Answer 2

try without the %10 in the address:

[fe80::297a:3cfd:fee5:3326%10]

should be

[fe80::297a:3cfd:fee5:3326]

Answer 3

According to this bug report, Firefox doesn't support link-local IPv6 addresses in the address bar.

A workaround is to use the link-global IPv6 address of the host (if it's not in a standalone network, of course). According to the Arch Linux manual on IPv6:

If you add an option -I your-global-ipv6 [to ping], link-local hosts will respond with their link-global scope addresses. The interface (%eth0) can be omitted in this case:

ping -I 2001:4f8:fff6::21 ff02::1

Now you know the global IPv6 address of your destination host. Check ip -6 neigh and use it the address bar of your browser: http://[2001:db8::c:d].

Answer 4

I acknowledge the OP appears to want an answer for Windows (although they did not explicitly specify an operating system), to which they have received answers from other users.

However, I have an answer for Linux users who came to this page.

On Linux, use the following command to show only the router addresses:

$ ip -6 neighbour | grep router

To expand on this answer: how to access router with IPv6 address?, the link-local fe80 addresses need to be combined with interface.

fe80::1 dev eth0 lladdr xx:xx:xx:xx:xx:xx router REACHABLE would become fe80::1%eth0

Firefox still does not appear to like link-local addresses, so you will have to use Chromium, SSH or something else to connect to the device.

The global addresses of the router can be used as-is.

Edit: The above technically did not answer the question. That only shows how to get the address. Furthermore, it seems like Chromium does not even support link-local addresses (I thought I had used it before). A workaround is https://stackoverflow.com/a/46881540

When IPv6 addresses are used in the context of a web address, they need to be encapsulated in square brackets:

https://[dead:beef::]/ would be used in curl command or web browsers to contact dead:beef:: IPv6 address over HTTPS protocol.

There is a reason why link-local addresses are preferred (despite not being supported by browsers). If you change ISP or your ISP changes IPv6 address across reboots (mine does), then the prefix will change. If your internet connection goes down, your IPv6 prefix will be dropped and your global addresses will no longer work at all. The link-local address gets you into your router, regardless of the state of your internet connection.

Answer 5

You know your own global IPv6 address and your router's link-local IPv6 address. And - by networking basics - your router sits in the same network segment as the machine you are working on (by definition of a router). So the global part of both addresses must be the same: 2a0b:c230:35:204c::/64 in this example (as /64 are the smallest IPv6 networks which are can be routed globally).

So it is very probable that the local part of one of your router's global addresses is the same like that in the link-local address. Take your router's address local part (the last 16 "nibbles" - or 8 bytes - or 64 bits) and your global prefix, to get a global IPv6 address for your router.

e.g. with the OP's data:

IPv6 Address . . . . . . . . . . : 2a0b:c230:35:204c::7a6
Deafult Gateway  . . . . . . . . : fe80::297a:3cfd:fee5:3326%10

so combine 2a0b:c230:35:204c:: (your global IPv6) prefix with your router's interface identifier ::297a:3cfd:fee5:3326

You ´d get 2a0b:c230:35:204c:297a:3cfd:fee5:3326 - so use

http://[2a0b:c230:35:204c:297a:3cfd:fee5:3326]/ as URL (worked for me with firefox 110).

Answer 6

running ipconfig /all command within cmd.exe will show under Deafult Gateway an address(es) that are valid to access modem/router

if both protocols are enabled there should be 2 addresses - IPv4 & IPv6

https://www.sony.co.uk/electronics/support/articles/00010017

---

next, for IPv4 we add http:// (as https:// is not valid in this case) and skip/ignore browser warning about unsecured connection. usually it would be in this form:

http://192.168.0.1

for IPv6 we take the Deafult Gateway and strip it from %... enclose it with [] brackets and add http:// in OP's case it would look like:

http://[fe80::297a:3cfd:fee5:3326]

---

another way would be to convert IPv4 address into IPv6

we take 192.168.0.1 and convert each octet into binary:

11000000.10101000.00000000.00000001

next we convert it into hexadecimal notation and add ::ffff: in front of it:

1100 (12 in decimal) corresponds to C in hexadecimal
0000 (0  in decimal) corresponds to 0 in hexadecimal
1010 (10 in decimal) corresponds to A in hexadecimal
0000 (0  in decimal) corresponds to 0 in hexadecimal
0000 (0  in decimal) corresponds to 0 in hexadecimal
0000 (0  in decimal) corresponds to 0 in hexadecimal
0000 (0  in decimal) corresponds to 0 in hexadecimal
0001 (1  in decimal) corresponds to 1 in hexadecimal

_____________________________________________________

::ffff:c0a8:1

so the final form of http://192.168.0.1 would be:

http://[::ffff:c0a8:1] 

Answer 7

How come nobody's pointing out that in the Windows IP Configuration text posted by the asker, it clearly reveals his IPv4 address as 10.10.10.100, meaning that his router should be accessible at the following address:

http://10.10.10.1

To answer the specific question about accessing the router, using the link-local gateway address after stripping the "%" and interface code at the end should definitely work. In effect, the correct router IPv6 address is:

http://[fe80::297a:3cfd:fee5:3326]

I tested my router's IPv6 link-local gateway address (http://[fe80::xxxx:xxxx:xxxx:ef28]) in two old browsers: Opera 54.0, released way back in June 2018, and Chrome 68.0.3440.106, released in August 2018. Both browsers allowed me to login successfully, so I don't know why other users reported that Chrome wasn't working. Hope this helps future users.