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[GH-ISSUE #1375] RSA key authorization error #557

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opened 2026-10-13 20:24:05 +00:00 by bsakaguchi · 7 comments

bsakaguchi commented

2026-10-13 20:24:05 +00:00

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Originally created by @major-118 on GitHub (Jan 23, 2025).
Original GitHub issue: https://github.com/amnezia-vpn/amnezia-client/issues/1375

When trying to log in to a VPS using an RSA key, error 300 occurs. The authorization data is entered correctly. Authorization from the SSH client is successful. Tested on four servers. The key is RSA 4096

Client: Amnezia VPN 4.8.2.3 on Windows 10
Server - Ubuntu 22.04

Originally created by @major-118 on GitHub (Jan 23, 2025). Original GitHub issue: https://github.com/amnezia-vpn/amnezia-client/issues/1375 When trying to log in to a VPS using an RSA key, error 300 occurs. The authorization data is entered correctly. Authorization from the SSH client is successful. Tested on four servers. The key is RSA 4096 ![Image](https://github.com/user-attachments/assets/068721ad-82c2-409f-9d3f-a632220121d7) Client: Amnezia VPN 4.8.2.3 on Windows 10 Server - Ubuntu 22.04

bsakaguchi closed this issue

2026-10-13 20:24:05 +00:00

bsakaguchi commented

2026-10-13 20:24:07 +00:00

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@eltempo commented on GitHub (Jan 25, 2025):

After the same error, a tip popped up saying that Amnezia VPN cannot use the RSA key for some reason and you need to use ED25519. So I generated a new SSH key in ED25519 format and reinstalled the server.
As a result Amnezia VPN connects and works fine using ED25519 key.

@eltempo commented on GitHub (Jan 25, 2025): After the same error, a tip popped up saying that Amnezia VPN cannot use the RSA key for some reason and you need to use ED25519. So I generated a new SSH key in ED25519 format and reinstalled the server. As a result Amnezia VPN connects and works fine using ED25519 key.

bsakaguchi commented

2026-10-13 20:24:07 +00:00

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@major-118 commented on GitHub (Jan 25, 2025):

unfortunately, when trying to connect to an existing server with ed25519 key, the same error occurs.

@major-118 commented on GitHub (Jan 25, 2025): unfortunately, when trying to connect to an existing server with ed25519 key, the same error occurs.

bsakaguchi commented

2026-10-13 20:24:07 +00:00

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@eltempo commented on GitHub (Jan 25, 2025):

@major-118 did you delete the old RSA key and reinstall the server from scratch with the new ED25519 key?

@eltempo commented on GitHub (Jan 25, 2025): @major-118 did you delete the old RSA key and reinstall the server from scratch with the new ED25519 key?

bsakaguchi commented

2026-10-13 20:24:07 +00:00

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@major-118 commented on GitHub (Jan 26, 2025):

No.
I do not have a server with an RSA key connection. This connection was not created due to an error.
There is a server with a password connection. I want to connect to this existing server by ED25519 key.

@major-118 commented on GitHub (Jan 26, 2025): No. I do not have a server with an RSA key connection. This connection was not created due to an error. There is a server with a password connection. I want to connect to this existing server by ED25519 key.

bsakaguchi commented

2026-10-13 20:24:08 +00:00

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@eltempo commented on GitHub (Jan 26, 2025):

@major-118 you don't need Amnesia VPN to reinstall the server.
You need to do it in the VPS server control panel of your hosting provider.
Delete your unsuitable RSA key there and use the new ED25519 key when installing the server from scratch

@eltempo commented on GitHub (Jan 26, 2025): @major-118 you don't need Amnesia VPN to reinstall the server. You need to do it in the VPS server control panel of your hosting provider. Delete your unsuitable RSA key there and use the new ED25519 key when installing the server from scratch

bsakaguchi commented

2026-10-13 20:24:08 +00:00

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@major-118 commented on GitHub (Jan 26, 2025):

There are no keys in the VPS control panel. All keys (RSA and ED25519) are created in the terminal command line. Both keys work for SSH login. And they are not displayed in the VPS control panel.
I don't want to reinstall the VPS and reconfigure all services. A lot of work because of the Amnezia bug

@major-118 commented on GitHub (Jan 26, 2025): There are no keys in the VPS control panel. All keys (RSA and ED25519) are created in the terminal command line. Both keys work for SSH login. And they are not displayed in the VPS control panel. I don't want to reinstall the VPS and reconfigure all services. A lot of work because of the Amnezia bug

bsakaguchi commented

2026-10-13 20:24:08 +00:00

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@Nethius commented on GitHub (Feb 18, 2025):

AmneziaVPN supports this keys format:

ssh-keygen -t rsa -m PEM -b 2048
ssh-keygen -t rsa -m PEM -b 3072
ssh-keygen -t rsa -m PEM -b 4096
ssh-keygen -t ed25519

@Nethius commented on GitHub (Feb 18, 2025): AmneziaVPN supports this keys format: ssh-keygen -t rsa -m PEM -b 2048 ssh-keygen -t rsa -m PEM -b 3072 ssh-keygen -t rsa -m PEM -b 4096 ssh-keygen -t ed25519

bsakaguchi referenced this issue

2026-10-13 21:16:41 +00:00

[PR #557] [MERGED] Update PageSetupWizardCredentials.qml #1914