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Dual stack (IPv6+IPv4) host --> IPv4 only hosts always relayed #2392

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opened 2025-11-20 07:09:06 -05:00 by saavagebueno · 1 comment
saavagebueno commented 2025-11-20 07:09:06 -05:00
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Originally created by @bo0ohXae on GitHub (Oct 18, 2025).

Most of my hosts have both IPV6 and IPV4 addresses including the netbird management/stun/coturn server itself. Everything works perfectly on these, and they P2P via IPv6. However, when one of these dual stack hosts connects to an ipv4-only host, the connection is always relayed.

A clear and concise description of what the problem is.

Dual host Ipv6 IP <-- relay --> IPv4 only host
Dual host ipv4 IP

Expected behavior

Netbird should somehow detect both IPv6 and IPV4 IPs and do:
Dual host Ipv6 IP
Dual host ipv4 IP <-- p2p --> IPv4 only host

Are you using NetBird Cloud?

Self-hosted

NetBird version

0.59.7

Is any other VPN software installed?

No

Originally created by @bo0ohXae on GitHub (Oct 18, 2025). Most of my hosts have both IPV6 and IPV4 addresses including the netbird management/stun/coturn server itself. Everything works perfectly on these, and they P2P via IPv6. However, when one of these dual stack hosts connects to an ipv4-only host, the connection is always relayed. A clear and concise description of what the problem is. Dual host Ipv6 IP <-- relay --> IPv4 only host Dual host ipv4 IP **Expected behavior** Netbird should somehow detect both IPv6 and IPV4 IPs and do: Dual host Ipv6 IP Dual host ipv4 IP <-- p2p --> IPv4 only host **Are you using NetBird Cloud?** Self-hosted **NetBird version** 0.59.7 **Is any other VPN software installed?** No
saavagebueno added the triage-needed label 2025-11-20 07:09:06 -05:00
saavagebueno commented 2025-11-20 07:09:07 -05:00
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@michalgabor commented on GitHub (Oct 30, 2025):

same problem with dual stack

@michalgabor commented on GitHub (Oct 30, 2025): same problem with dual stack
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Reference: SVI/netbird#2392
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