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Signature from server's h...

Signature from server's host key is invalid Highlighted

Created: Oct 27, 2021 06:28:18Latest reply: Dec 7, 2021 16:18:00 2483 37 19 0 2

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Hi,

When trying to connect to the S5720 switch using putty, some of you might get the error "Signature from server's host key is invalid". What happened to this login? And how can we solve that? In this post, we’ll share with you how to deal with the error "Signature from server's host key is invalid".

Signature from server's host key is invalid

What caused "Signature from server's host key is invalid"?

This error is caused due to the incompatible putty version and the device version. For some old versions, such as V100R005, it is not compatible with the newer putty version. The putty has restrictions on the early version. The default setting is not supported.

How to deal with "Signature from server's host key is invalid"?

There are three ways to deal with this error.

Replace your putty with an old version, such as 0.70.
Upgrade your device to the latest version.
Exchange the putty algorithm selection policy.
Enter the path 'SSH' > 'Host keys', and prioritize the 'RSA' to the top.

The post is synchronized to: Security WLAN Network Manager&SDN Middle East Engineer Technical Group

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chenhui Admin Created Oct 27, 2021 06:30:19

Have you ever encountered this error before?

@Unicef @Haseeb_Haris @wissal @zaheernew @sachandio @Vesper_EvenStar @Diego.Silva @Sara_Obaid @Vlada85 @Caroline_Herrera @Laiheang @AL_93 @Kevin_Thomas @Chanbora @user_4326135 @adrian_alucard @Saqib123 @Herediano @IndianKid @Sokrin @hemin88 @simchamnan @Zemo_Mccracken @user_4237671 @andersoncf1 @BAZ @kunthea @Rumana @Anno7 @Precious @Abdussamed @umaryaqub @MahMush @taha_29four @nochhie @chantha @Malik3000 @smileymind @Navin_kay @user_4358465 @Majdi.Chebil @AndresMoreno @shakeela @phuta @Ayeshaali @user_4001805 @VinceD @lucian2003

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Rumana Created Oct 27, 2021 07:18:00 (0) (0)

Majdi.Chebil Created Oct 27, 2021 07:28:09 (0) (0)
Not really bcz I usually use SSH (Linux) and VNC

GhaziAsad Created Oct 27, 2021 16:27:38 (0) (0)

GhaziAsad Created Oct 27, 2021 16:27:46 (0) (0)

zaheernew Created Oct 28, 2021 04:04:34 (0) (0)

user_4396693 Created Dec 7, 2021 07:07:47 (0) (0)
good

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andersoncf1

MVE Author Created Oct 27, 2021 16:11:19

Thanks for sharing

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chenhui Created Oct 28, 2021 12:25:29 (1) (0)
Thank you @andersoncf1

andersoncf1 Reply chenhui Created Oct 28, 2021 17:07:58 (0) (0)

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GhaziAsad

Created Oct 27, 2021 16:27:51

Nice

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GhaziAsad

Created Oct 27, 2021 16:27:59

Signature from server's host key is invalid-4250313-1

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chenhui Created Oct 28, 2021 12:25:42 (0) (0)
Thanks

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^6#

Rumana

Created Oct 28, 2021 05:14:49

Thanks for sharing

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chenhui Created Oct 28, 2021 12:25:13 (0) (0)

Thank you!

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^7#

Malik3000

MVE Created Oct 28, 2021 18:03:25

Thanks for sharing

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chenhui Created Oct 29, 2021 04:59:52 (0) (0)

Thank you! @Malik3000

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^8#

Malik3000

MVE Created Oct 28, 2021 18:03:51

Good

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Herediano

Created Oct 30, 2021 18:13:58

Excellent, thank you for sharing!

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sabahshahzad Created Dec 7, 2021 16:17:25 (0) (0)

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^10#

NTan33

Created Oct 31, 2021 03:52:29

Great troubleshooting tips!

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