今天升级ubuntu 22.04/Window 11后最基本的ssh登陆突然出问题了, 提示有几种:
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Unable to negotiate with UNKNOWN port 65535: no matching host key type found. Their offer: ssh-rsa,ssh-dss lost connection sign_and_send_pubkey: no mutual signature supported |
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Git Pull failed Unable to negotiate with xx.xx.xx.xx port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. |
一查发现…好嘛, openssh觉得ssh-rsa加密方式不安全, 直接从8.8开始默认不允许这种密钥用于登陆了…
解决方法是可以在~/.ssh/config里面加这么一段解决:
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Host * PubkeyAcceptedKeyTypes +ssh-rsa HostKeyAlgorithms +ssh-rsa |
第一行说明对所有主机生效, 第二行是将 ssh-rsa 加会允许使用的范围, 第三行是指定所有主机使用的都是 ssh-rsa 算法的key。
实测两行都得要写才行, 没有第二行提示没有 ssh-rsa 这么个类型
没有第三行就提示 sign_and_send_pubkey: no mutual signature supported。