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[IPv4]

#1

IPv6 on Windows / Re: unreachable from outside

Last post by snarked - March 23, 2026, 12:38:29 AM

what do you mean by 41 for IPv4? There isn't a selection for which whether I accept 41 on IPv4 or IPv6. Just a "Protocol 41".
Can you tell me where I can allow protocol 41 on IPv4? redefining doesn't help...

Set protocol type to IPv4.
Set protocol number to 41.
There are no ports for the protocol.
Allow that.

#2

IPv6 on Windows / Re: unreachable from outside

Last post by cnsh - March 19, 2026, 04:30:41 AM

Brief sum up of my issue:
- IPv6 port stays closed and blocked while the same port number on v4 is opened.
- It is NOT A ROUTER ISSUE. TURNING OFF THE PC'S FIREWALL OPENS THE V6 PORT.
- It is not protocol 41 rule issue. I have already allowed protocol 41 on my firewall, with edge traversal allowed.

Someone please give me a solution, this thing has been bugging me for weeks

#3

IPv6 on Windows / Re: unreachable from outside

Last post by cnsh - March 19, 2026, 03:00:56 AM

minor update. I tried to run a port scan to my server, and accidently scanned port 53, the DNS port. It was open. But the server's other IPv6 port was closed while the IPv4 one open.

[IPv4]

#4

IPv6 on Windows / Re: unreachable from outside

Last post by cnsh - March 14, 2026, 06:55:02 AM

what do you mean by 41 for IPv4? There isn't a selection for which whether I accept 41 on IPv4 or IPv6. Just a "Protocol 41".
Can you tell me where I can allow protocol 41 on IPv4? redefining doesn't help...

#5

IPv6 on Windows / Re: unreachable from outside

Last post by snarked - March 14, 2026, 12:55:02 AM

I have protocol 41 Core Networking enabled, I have no idea about 41 for IPv4...
Both inbound and outbound protocol 41 rules are set.

Protocol 41 has to be allowed for IPv4.  Unless you are also doing IPv6 in IPv6, it need not be allowed for IPv6.

#6

IPv6 on Windows / Re: unreachable from outside

Last post by cnsh - March 12, 2026, 09:30:04 PM

I changed the tunnel to london, and this problem reoccurs. Even when I turn edge traversing on. Same issue happens, everything works fine and the port is reachable when the firewall is down, but not when it's up.

#7

IPv6 Basics & Questions & General Chatter / Re: TunnelBroker.net domain ex...

Last post by idealneck - March 11, 2026, 05:30:43 AM

P.S. HE support is already aware so don't bother them with emails

#8

IPv6 Basics & Questions & General Chatter / Re: TunnelBroker.net domain ex...

Last post by idealneck - March 11, 2026, 05:16:01 AM

To keep DDNS working you can add the following to your /etc/hosts:

Code Select Expand

64.62.200.2 tunnelbroker.net ipv4.tunnelbroker.net www.tunnelbroker.net

Retrieved via

Code Select Expand

dig @ns1.he.net tunnelbroker.net

#9

IPv6 Basics & Questions & General Chatter / TunnelBroker.net domain expire...

Last post by idealneck - March 11, 2026, 05:11:12 AM

Seems like HE forgot to renew their TunnelBroker.net domain :(

#10

IPv6 on Windows / Re: unreachable from outside

Last post by cnsh - March 07, 2026, 06:22:48 PM

I could solve the issue by allowing edge traversal on Core Networking protocol 41 firewall rule. And, I have moved my tunnel's endpoint to a physically closer geolocation, Hongkong.