问题描述

oralce linux 可以ssh到其他设备，可是其他设备ssh不上oracle linux

ssh username@hostip -v

OpenSSH_6.6.1,OpenSSL 1.0.1e-fips 11 Feb 2013

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: /etc/ssh/ssh_config line 56: Applying options for *

debug1: Connecting to 192.168.100.27 [192.168.100.27] port 2222.

debug1: Connection established.

debug1: permanently_set_uid: 0/0

debug1: identity file /root/.ssh/id_rsa type -1

debug1: identity file /root/.ssh/id_rsa-cert type -1

debug1: identity file /root/.ssh/id_dsa type -1

debug1: identity file /root/.ssh/id_dsa-cert type -1

debug1: identity file /root/.ssh/id_ecdsa type -1

debug1: identity file /root/.ssh/id_ecdsa-cert type -1

debug1: identity file /root/.ssh/id_ed25519 type -1

debug1: identity file /root/.ssh/id_ed25519-cert type -1

debug1: Enabling compatibility mode for protocol 2.0

debug1: Local version string SSH-2.0-OpenSSH_6.6.1

debug1: Remote protocol version 2.0,remote software version OpenSSH_6.6.1

debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000

debug1: SSH2_MSG_KEXINIT sent

Read from socket Failed: Connection reset by peer

原因

linux oracle /etc/ssh 目录下默认没有 ssh_host_rsa_key,ssh_host_ecdsa_key,ssh_host_ed25519_key

这三个公私钥文件

ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key

ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key

ssh-keygen -t ed25519 -f /etc/ssh/ssh_host_ed25519_key

systemctl restart sshd

提示输入密码时直接按 enter 键就行了，也可以在 ssh-keygen 中使用 -P选项 指定使用什么密码