[GH-ISSUE #91] [Bug] Unable to set device configuration with I1-I5 CPS parameters v2.0.0 #58

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opened 2026-10-13 21:11:26 +00:00 by bsakaguchi · 1 comment

bsakaguchi commented

2026-10-13 21:11:26 +00:00

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Originally created by @Q00000P on GitHub (Mar 18, 2026).
Original GitHub issue: https://github.com/amnezia-vpn/amneziawg-windows-client/issues/91

AmneziaWG 2.0.0 Windows** — activating a tunnel with I1-I5 parameters gives "Unable to set device configuration" error.

The same config works fine in AmneziaVPN for Windows.

Without I1-I5 lines the tunnel activates normally.

Config (keys redacted):

[Interface]
PrivateKey = <redacted>
Jc = **Конфиг (ключи заменены):**
```ini
[Interface]
PrivateKey = <redacted>
Jc = <redacted>
Jmin = <redacted>
Jmax =<redacted>
S1 = <redacted>
S2 = <redacted>
H1 = <redacted>
H2 = <redacted>
H3 = <redacted>
H4 = <redacted>
I1 = <b 0xc700000001...> (QUIC Initial, ~350 bytes hex)
I2 = <c><t><r 32>
I3 = <t><c><r 48>
I4 = <r 16><c><t><r 24>
I5 = <c><r 64><t>
Address = 10.20.23.2/24
DNS =10.20.23.1
MTU = 1420
[Peer]
PublicKey = <redacted>
PresharedKey = <redacted>
AllowedIPs = 0.0.0.0/0, ::/0
Endpoint = x.x.x.x:1234
PersistentKeepalive = 25

OS: Windows 11

Originally created by @Q00000P on GitHub (Mar 18, 2026). Original GitHub issue: https://github.com/amnezia-vpn/amneziawg-windows-client/issues/91 AmneziaWG 2.0.0 Windows** — activating a tunnel with I1-I5 parameters gives "Unable to set device configuration" error. The same config works fine in **AmneziaVPN** for Windows. Without I1-I5 lines the tunnel activates normally. **Config (keys redacted):** ```ini [Interface] PrivateKey = <redacted> Jc = **Конфиг (ключи заменены):** ```ini [Interface] PrivateKey = <redacted> Jc = <redacted> Jmin = <redacted> Jmax =<redacted> S1 = <redacted> S2 = <redacted> H1 = <redacted> H2 = <redacted> H3 = <redacted> H4 = <redacted> I1 = <b 0xc700000001...> (QUIC Initial, ~350 bytes hex) I2 = <c><t><r 32> I3 = <t><c><r 48> I4 = <r 16><c><t><r 24> I5 = <c><r 64><t> Address = 10.20.23.2/24 DNS =10.20.23.1 MTU = 1420 [Peer] PublicKey = <redacted> PresharedKey = <redacted> AllowedIPs = 0.0.0.0/0, ::/0 Endpoint = x.x.x.x:1234 PersistentKeepalive = 25 ``` **OS:** Windows 11

bsakaguchi commented

2026-10-13 21:11:27 +00:00

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@pashket commented on GitHub (Mar 21, 2026):

Try to remove or replace <c> from I1-I5.

@pashket commented on GitHub (Mar 21, 2026): Try to remove or replace `<c>` from I1-I5.

bsakaguchi referenced this issue

2026-10-13 21:11:58 +00:00

[PR #58] [MERGED] build win7 version with thongtech/go-legacy-win7 #110