建设网站企业银行,让别人做网站需要注意什么问题,青岛微网站建设,wordpress分类下文章置顶血的教训–kail系统免密centos7的坑【高版本ssh免密低版本ssh的坑】 最近下载了一个2023版本的kail系统#xff0c;但是经过几次设置免密后#xff0c;ssh过去一直让提供密码#xff0c;所以就仔细的分析了一下#xff0c;果然还是发现了点猫腻 接上一个博客#xff0c;大…血的教训–kail系统免密centos7的坑【高版本ssh免密低版本ssh的坑】 最近下载了一个2023版本的kail系统但是经过几次设置免密后ssh过去一直让提供密码所以就仔细的分析了一下果然还是发现了点猫腻 接上一个博客大家可以看看ssh免密之间的坑 入侵redis之准备—linux之间的免密通信原来是这么的简单
ssh免密其实很简单但是没想到还是有一些坑 出现免密失败的情况我也是百度了好多都是让更改目录的权限但是都失败了其实这跟权限有关系但是我们基本上也不会动这些目录的权限如果你的权限没有问题那就可以往我这个方向考虑了那就是高版本的ssh加密方式和低版本ssh啊hi见的加密方式不一样大家知道最近ssh低于9版本有漏洞所以ssh版本都升级到9以上了但是部分还是9一下版本这个就是免密失败的原因。
关键报错
debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/liushuai/.ssh/id_rsa
debug3: no such identity: /home/liushuai/.ssh/id_rsa: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ecdsa
debug3: no such identity: /home/liushuai/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ecdsa_sk
debug3: no such identity: /home/liushuai/.ssh/id_ecdsa_sk: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ed25519
debug3: no such identity: /home/liushuai/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ed25519_sk
debug3: no such identity: /home/liushuai/.ssh/id_ed25519_sk: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_xmss
debug3: no such identity: /home/liushuai/.ssh/id_xmss: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password废话不多说直接开干
系统ip介绍kail系统192.168.126.132生成公钥并推送到centos7上centos7192.168.126.133接受免密实现kail往centos7方向免密
先按照老的免密方式搞一波
生成密钥
┌──(liushuai㉿bogon)-[~]
└─$ ssh-keygen -t dsa ###注意看咱这边的加密方式是dsa这个就是坑
Generating public/private dsa key pair.
Enter file in which to save the key (/home/liushuai/.ssh/id_dsa):
Created directory /home/liushuai/.ssh.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/liushuai/.ssh/id_dsa
Your public key has been saved in /home/liushuai/.ssh/id_dsa.pub
The key fingerprint is:
SHA256:k47VhY43db0GBtwHoUvZIVgnPDYui3QtT4vsGgBXewQ liushuaibogon
The keys randomart image is:
---[DSA 1024]----
| E...o |
| . o. BO..o |
| . . . .o .|
| o ..O.*o.. .|
| .. S %.. o |
| . * . |
| ..o |
| .. |
| .. |
----[SHA256]----- 拷贝密钥
┌──(liushuai㉿bogon)-[~]
└─$ ssh-copy-id root192.168.196.133
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: /home/liushuai/.ssh/id_dsa.pub
The authenticity of host 192.168.196.133 (192.168.196.133) cant be established.
ED25519 key fingerprint is SHA256:ieG7iUYRDYyuZcBk5f2ABb9S2us0LzsIZEJqzhQwdFM.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root192.168.196.133s password: Number of key(s) added: 1Now try logging into the machine, with: ssh root192.168.196.133
and check to make sure that only the key(s) you wanted were added. 测试免密登录
┌──(liushuai㉿bogon)-[~]
└─$ ssh root192.168.196.133
root192.168.196.133s password: ####还是需要密码的为什么的接着往下看原因分析 经过排查是因为两台主机的ssh版本问题 kail系统的版本OpenSSH_9.3p2 Debian-1
┌──(liushuai㉿bogon)-[~]
└─$ ssh -V
OpenSSH_9.3p2 Debian-1, OpenSSL 3.0.10 1 Aug 2023 centos的版本7.4P1 进一步分析
利用ssh -vvv的功能查看问题出现在哪里 ┌──(liushuai㉿bogon)-[~]
└─$ ssh root192.168.196.133
root192.168.196.133s password:
Last login: Wed Nov 29 07:52:35 2023
[rootbogon ~]# exit
logout
Connection to 192.168.196.133 closed.┌──(liushuai㉿bogon)-[~]
└─$ ssh root192.168.196.133 -vvv
OpenSSH_9.3p2 Debian-1, OpenSSL 3.0.10 1 Aug 2023
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug2: resolve_canonicalize: hostname 192.168.196.133 is address
debug3: expanded UserKnownHostsFile ~/.ssh/known_hosts - /home/liushuai/.ssh/known_hosts
debug3: expanded UserKnownHostsFile ~/.ssh/known_hosts2 - /home/liushuai/.ssh/known_hosts2
debug3: ssh_connect_direct: entering
debug1: Connecting to 192.168.196.133 [192.168.196.133] port 22.
debug3: set_sock_tos: set socket 3 IP_TOS 0x10
debug1: Connection established.
debug1: identity file /home/liushuai/.ssh/id_rsa type -1
debug1: identity file /home/liushuai/.ssh/id_rsa-cert type -1
debug1: identity file /home/liushuai/.ssh/id_ecdsa type -1
debug1: identity file /home/liushuai/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/liushuai/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/liushuai/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/liushuai/.ssh/id_ed25519 type -1
debug1: identity file /home/liushuai/.ssh/id_ed25519-cert type -1
debug1: identity file /home/liushuai/.ssh/id_ed25519_sk type -1
debug1: identity file /home/liushuai/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/liushuai/.ssh/id_xmss type -1
debug1: identity file /home/liushuai/.ssh/id_xmss-cert type -1
debug1: identity file /home/liushuai/.ssh/id_dsa type 1
debug1: identity file /home/liushuai/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.3p2 Debian-1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: compat_banner: match: OpenSSH_7.4 pat OpenSSH_7.4* compat 0x04000006
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.196.133:22 as root
debug3: record_hostkey: found key type ED25519 in file /home/liushuai/.ssh/known_hosts:1
debug3: record_hostkey: found key type ECDSA in file /home/liushuai/.ssh/known_hosts:2
debug3: load_hostkeys_file: loaded 2 keys from 192.168.196.133
debug1: load_hostkeys: fopen /home/liushuai/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug3: order_hostkeyalgs: have matching best-preference key type ssh-ed25519-cert-v01openssh.com, using HostkeyAlgorithms verbatim
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: sntrup761x25519-sha512openssh.com,curve25519-sha256,curve25519-sha256libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,ext-info-c
debug2: host key algorithms: ssh-ed25519-cert-v01openssh.com,ecdsa-sha2-nistp256-cert-v01openssh.com,ecdsa-sha2-nistp384-cert-v01openssh.com,ecdsa-sha2-nistp521-cert-v01openssh.com,sk-ssh-ed25519-cert-v01openssh.com,sk-ecdsa-sha2-nistp256-cert-v01openssh.com,rsa-sha2-512-cert-v01openssh.com,rsa-sha2-256-cert-v01openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519openssh.com,sk-ecdsa-sha2-nistp256openssh.com,rsa-sha2-512,rsa-sha2-256
debug2: ciphers ctos: chacha20-poly1305openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcmopenssh.com,aes256-gcmopenssh.com
debug2: ciphers stoc: chacha20-poly1305openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcmopenssh.com,aes256-gcmopenssh.com
debug2: MACs ctos: umac-64-etmopenssh.com,umac-128-etmopenssh.com,hmac-sha2-256-etmopenssh.com,hmac-sha2-512-etmopenssh.com,hmac-sha1-etmopenssh.com,umac-64openssh.com,umac-128openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etmopenssh.com,umac-128-etmopenssh.com,hmac-sha2-256-etmopenssh.com,hmac-sha2-512-etmopenssh.com,hmac-sha1-etmopenssh.com,umac-64openssh.com,umac-128openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlibopenssh.com,zlib
debug2: compression stoc: none,zlibopenssh.com,zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: chacha20-poly1305openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcmopenssh.com,aes256-gcmopenssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
debug2: ciphers stoc: chacha20-poly1305openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcmopenssh.com,aes256-gcmopenssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
debug2: MACs ctos: umac-64-etmopenssh.com,umac-128-etmopenssh.com,hmac-sha2-256-etmopenssh.com,hmac-sha2-512-etmopenssh.com,hmac-sha1-etmopenssh.com,umac-64openssh.com,umac-128openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etmopenssh.com,umac-128-etmopenssh.com,hmac-sha2-256-etmopenssh.com,hmac-sha2-512-etmopenssh.com,hmac-sha1-etmopenssh.com,umac-64openssh.com,umac-128openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlibopenssh.com
debug2: compression stoc: none,zlibopenssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server-client cipher: chacha20-poly1305openssh.com MAC: implicit compression: none
debug1: kex: client-server cipher: chacha20-poly1305openssh.com MAC: implicit compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:ieG7iUYRDYyuZcBk5f2ABb9S2us0LzsIZEJqzhQwdFM
debug3: record_hostkey: found key type ED25519 in file /home/liushuai/.ssh/known_hosts:1
debug3: record_hostkey: found key type ECDSA in file /home/liushuai/.ssh/known_hosts:2
debug3: load_hostkeys_file: loaded 2 keys from 192.168.196.133
debug1: load_hostkeys: fopen /home/liushuai/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: Host 192.168.196.133 is known and matches the ED25519 host key.
debug1: Found key in /home/liushuai/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: ssh_set_newkeys: mode 1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: ssh_set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug3: ssh_get_authentication_socket_path: path /tmp/ssh-6WK2JhuI1VHD/agent.1125
debug1: get_agent_identities: bound agent to hostkey
debug1: get_agent_identities: ssh_fetch_identitylist: agent contains no identities
debug1: Skipping ssh-dss key /home/liushuai/.ssh/id_dsa - corresponding algo not in PubkeyAcceptedAlgorithms
debug1: Will attempt key: /home/liushuai/.ssh/id_rsa
debug1: Will attempt key: /home/liushuai/.ssh/id_ecdsa
debug1: Will attempt key: /home/liushuai/.ssh/id_ecdsa_sk
debug1: Will attempt key: /home/liushuai/.ssh/id_ed25519
debug1: Will attempt key: /home/liushuai/.ssh/id_ed25519_sk
debug1: Will attempt key: /home/liushuai/.ssh/id_xmss
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algsrsa-sha2-256,rsa-sha2-512
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password
debug3: preferred gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: No credentials were supplied, or the credentials were unavailable or inaccessible
No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_1000)debug1: No credentials were supplied, or the credentials were unavailable or inaccessible
No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_1000)debug1: Unspecified GSS failure. Minor code may provide more information
No such file or directorydebug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/liushuai/.ssh/id_rsa ###出现找不到文件
debug3: no such identity: /home/liushuai/.ssh/id_rsa: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ecdsa ###出现找不到文件
debug3: no such identity: /home/liushuai/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ecdsa_sk ###出现找不到文件
debug3: no such identity: /home/liushuai/.ssh/id_ecdsa_sk: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ed25519 ###出现找不到文件
debug3: no such identity: /home/liushuai/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_ed25519_sk ###出现找不到文件
debug3: no such identity: /home/liushuai/.ssh/id_ed25519_sk: No such file or directory
debug1: Trying private key: /home/liushuai/.ssh/id_xmss ###出现找不到文件
debug3: no such identity: /home/liushuai/.ssh/id_xmss: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
root192.168.196.133s password: 更改加密方式为rsa
清理掉之前的密钥文件
──(liushuai㉿bogon)-[~]
└─$ cd .ssh ┌──(liushuai㉿bogon)-[~/.ssh]
└─$ ls
id_dsa id_dsa.pub known_hosts known_hosts.old┌──(liushuai㉿bogon)-[~/.ssh] ###直接在.ssh目录下清理即可如有需要建议备份
└─$ rm -rf *
zsh: sure you want to delete all 4 files in /home/liushuai/.ssh [yn]? y┌──(liushuai㉿bogon)-[~/.ssh]
└─$ ls
### 重新生成密钥
┌──(liushuai㉿bogon)-[~/.ssh]
└─$ ssh-keygen -t rsa ##更换了加密算法为rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/liushuai/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/liushuai/.ssh/id_rsa
Your public key has been saved in /home/liushuai/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:VvO9A4ARor8FdlPJ2n6mpUy0ZOp3jRQpaitbqKTGTRI liushuaibogon
The keys randomart image is:
---[RSA 3072]----
| . oo.. |
| . . o |
| . o o . |
| E o o.o*o. |
| . . SB oo.. |
| . . . . |
| . . oo. B oo |
| oo....o o .. |
| .. . .o . . |
----[SHA256]-----
推送密钥
──(liushuai㉿bogon)-[~/.ssh]
└─$ ssh-copy-id root192.168.196.133 ###推送方式不变
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: /home/liushuai/.ssh/id_rsa.pub
The authenticity of host 192.168.196.133 (192.168.196.133) cant be established.
ED25519 key fingerprint is SHA256:ieG7iUYRDYyuZcBk5f2ABb9S2us0LzsIZEJqzhQwdFM.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root192.168.196.133s password: Number of key(s) added: 1Now try logging into the machine, with: ssh root192.168.196.133
and check to make sure that only the key(s) you wanted were added. 测试免密效果
└─$ ssh root192.168.196.133
Last login: Wed Nov 29 07:58:29 2023 from 192.168.196.132
[rootbogon ~]# ip a
1: lo: LOOPBACK,UP,LOWER_UP mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: ens33: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP group default qlen 1000link/ether 00:0c:29:96:4f:10 brd ff:ff:ff:ff:ff:ffinet 192.168.196.133/24 brd 192.168.196.255 scope global noprefixroute dynamic ens33valid_lft 1416sec preferred_lft 1416secinet6 fe80::bbeb:becc:8125:c52f/64 scope link noprefixroute valid_lft forever preferred_lft forever
[rootbogon ~]# exit
logout
Connection to 192.168.196.133 closed.结束语 没有随随便便的成功只有不断的努力
