Connect with the USG2130 using RSA authentication.Import the code generated by SecureCRT and it fails with message “Fail to decode key string, the key string may be invalid”.
The RSA key should be generated by the SSH v1.x client.Send the customer Putty and generate the RSA key of SSH v1.x.Problem is solved.
USG2100 series V1R2 just supports SSH v1.x.It doesn't support the SSH v2.x because these products are VRP3.X. VRP3.X doesn't support the SSH v2.x and only VRP5.X supports the SSH v2.x. SecureCRT(high version)generates the RSA key with SSH v2.x in default and the code format is not suitable for our products.