问题
使用SSH Key连接Github的时候出现卡住的情况，debug后看到如下信息：
[liujason@rstudio ~]$ GIT_SSH_COMMAND="ssh -vvv" git clone --progress [email protected]:LiuZixia/RShinyProjects.git RShinyProjects Cloning into 'RShinyProjects'... OpenSSH_8.0p1, OpenSSL 1.1.1c FIPS 28 May 2019 debug1: Reading configuration data /etc/ssh/ssh_config debug3: /etc/ssh/ssh_config line 51: Including file /etc/ssh/ssh_config.d/05-redhat.conf depth 0 debug1: Reading configuration data /etc/ssh/ssh_config.d/05-redhat.conf debug2: checking match for 'final all' host github.com originally github.com debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 3: not matched 'final' debug2: match not found debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 5: Including file /etc/crypto-policies/back-ends/openssh.config depth 1 (parse only) debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config debug3: gss kex names ok: [gss-gex-sha1-,gss-group14-sha1-] debug3: kex names ok: [curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1] debug1: configuration requests final Match pass debug1: re-parsing configuration debug1: Reading configuration data /etc/ssh/ssh_config debug3: /etc/ssh/ssh_config line 51: Including file /etc/ssh/ssh_config.d/05-redhat.conf depth 0 debug1: Reading configuration data /etc/ssh/ssh_config.d/05-redhat.conf debug2: checking match for 'final all' host github.com originally github.com debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 3: matched 'final' debug2: match found debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 5: Including file /etc/crypto-policies/back-ends/openssh.config depth 1 debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config debug3: gss kex names ok: [gss-gex-sha1-,gss-group14-sha1-] debug3: kex names ok: [curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1] debug2: resolving "github.com" port 22 debug2: ssh_connect_direct debug1: Connecting to github.com [140.82.118.3] port 22. debug1: Connection established. debug1: identity file /home/liujason/.ssh/id_rsa type 0 debug1: identity file /home/liujason/.ssh/id_rsa-cert type -1 debug1: identity file /home/liujason/.ssh/id_dsa type -1 debug1: identity file /home/liujason/.ssh/id_dsa-cert type -1 debug1: identity file /home/liujason/.ssh/id_ecdsa type -1 debug1: identity file /home/liujason/.ssh/id_ecdsa-cert type -1 debug1: identity file /home/liujason/.ssh/id_ed25519 type -1 debug1: identity file /home/liujason/.ssh/id_ed25519-cert type -1 debug1: identity file /home/liujason/.ssh/id_xmss type -1 debug1: identity file /home/liujason/.ssh/id_xmss-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_8.0 debug1: Remote protocol version 2.0, remote software version babeld-849b9b5f debug1: no match: babeld-849b9b5f debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to github.com:22 as 'git' 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: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c debug2: host key algorithms: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: [email protected],[email protected],aes256-ctr,aes256-cbc,[email protected],aes128-ctr,aes128-cbc debug2: ciphers stoc: [email protected],[email protected],aes256-ctr,aes256-cbc,[email protected],aes128-ctr,aes128-cbc debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,[email protected],hmac-sha2-512 debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,[email protected],hmac-sha2-512 debug2: compression ctos: none,[email protected],zlib debug2: compression stoc: none,[email protected],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,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256 debug2: host key algorithms: ssh-dss,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc debug2: ciphers stoc: [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc debug2: MACs ctos: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib,[email protected] debug2: compression stoc: none,zlib,[email protected] debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug1: kex: algorithm: curve25519-sha256 debug1: kex: host key algorithm: rsa-sha2-512 debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none debug1: kex: curve25519-sha256 need=32 dh_need=32 debug1: kex: curve25519-sha256 need=32 dh_need=32 debug3: send packet: type 30 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
解决方案
是加密模式不支持导致的，CentOS8移除了对旧的加密模式支持，因此需要手动开启。
在/etc/ssh/ssh_config中修改，文末添加一行：
Ciphers aes128-ctr,aes192-ctr,aes256-ctr
重试后成功连接：
[liujason@rstudio ~]$ GIT_SSH_COMMAND="ssh -vvv" git clone --progress [email protected]:LiuZixia/RShinyProjects.git RShinyProjects Cloning into 'RShinyProjects'... OpenSSH_8.0p1, OpenSSL 1.1.1c FIPS 28 May 2019 debug1: Reading configuration data /etc/ssh/ssh_config debug3: /etc/ssh/ssh_config line 52: Including file /etc/ssh/ssh_config.d/05-redhat.conf depth 0 debug1: Reading configuration data /etc/ssh/ssh_config.d/05-redhat.conf debug2: checking match for 'final all' host github.com originally github.com debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 3: not matched 'final' debug2: match not found debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 5: Including file /etc/crypto-policies/back-ends/openssh.config depth 1 (parse only) debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config debug3: gss kex names ok: [gss-gex-sha1-,gss-group14-sha1-] debug3: kex names ok: [curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1] debug1: configuration requests final Match pass debug1: re-parsing configuration debug1: Reading configuration data /etc/ssh/ssh_config debug3: /etc/ssh/ssh_config line 52: Including file /etc/ssh/ssh_config.d/05-redhat.conf depth 0 debug1: Reading configuration data /etc/ssh/ssh_config.d/05-redhat.conf debug2: checking match for 'final all' host github.com originally github.com debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 3: matched 'final' debug2: match found debug3: /etc/ssh/ssh_config.d/05-redhat.conf line 5: Including file /etc/crypto-policies/back-ends/openssh.config depth 1 debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config debug3: gss kex names ok: [gss-gex-sha1-,gss-group14-sha1-] debug3: kex names ok: [curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1] debug2: resolving "github.com" port 22 debug2: ssh_connect_direct debug1: Connecting to github.com [140.82.118.4] port 22. debug1: Connection established. debug1: identity file /home/liujason/.ssh/id_rsa type 0 debug1: identity file /home/liujason/.ssh/id_rsa-cert type -1 debug1: identity file /home/liujason/.ssh/id_dsa type -1 debug1: identity file /home/liujason/.ssh/id_dsa-cert type -1 debug1: identity file /home/liujason/.ssh/id_ecdsa type -1 debug1: identity file /home/liujason/.ssh/id_ecdsa-cert type -1 debug1: identity file /home/liujason/.ssh/id_ed25519 type -1 debug1: identity file /home/liujason/.ssh/id_ed25519-cert type -1 debug1: identity file /home/liujason/.ssh/id_xmss type -1 debug1: identity file /home/liujason/.ssh/id_xmss-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_8.0 debug1: Remote protocol version 2.0, remote software version babeld-849b9b5f debug1: no match: babeld-849b9b5f debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to github.com:22 as 'git' 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: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c debug2: host key algorithms: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,[email protected],hmac-sha2-512 debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,[email protected],hmac-sha2-512 debug2: compression ctos: none,[email protected],zlib debug2: compression stoc: none,[email protected],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,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256 debug2: host key algorithms: ssh-dss,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc debug2: ciphers stoc: [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc debug2: MACs ctos: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: [email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib,[email protected] debug2: compression stoc: none,zlib,[email protected] debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug1: kex: algorithm: curve25519-sha256 debug1: kex: host key algorithm: rsa-sha2-512 debug1: kex: server->client cipher: aes128-ctr MAC: [email protected] compression: none debug1: kex: client->server cipher: aes128-ctr MAC: [email protected] compression: none debug1: kex: curve25519-sha256 need=32 dh_need=32 debug1: kex: curve25519-sha256 need=32 dh_need=32 debug3: send packet: type 30 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug3: receive packet: type 31 debug1: Server host key: ssh-rsa SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8 The authenticity of host 'github.com (140.82.118.4)' can't be established. RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added 'github.com,140.82.118.4' (RSA) to the list of known hosts. debug3: send packet: type 21 debug2: set_newkeys: mode 1 debug1: rekey out after 4294967296 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug3: receive packet: type 21 debug1: SSH2_MSG_NEWKEYS received debug2: set_newkeys: mode 0 debug1: rekey in after 4294967296 blocks debug1: Will attempt key: /home/liujason/.ssh/id_rsa RSA SHA256:FdLchiAgcXUf2u6eneY7hX/FX5NOwjWnBzpAWwyhN04 debug1: Will attempt key: /home/liujason/.ssh/id_dsa debug1: Will attempt key: /home/liujason/.ssh/id_ecdsa debug1: Will attempt key: /home/liujason/.ssh/id_ed25519 debug1: Will attempt key: /home/liujason/.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-algs=<ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,rsa-sha2-512,rsa-sha2-256,ssh-dss> 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 debug3: start over, passed a different list publickey debug3: preferred gssapi-with-mic,publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering public key: /home/liujason/.ssh/id_rsa RSA SHA256:FdLchiAgcXUf2u6eneY7hX/FX5NOwjWnBzpAWwyhN04 debug3: send packet: type 50 debug2: we sent a publickey packet, wait for reply debug3: receive packet: type 60 debug1: Server accepts key: /home/liujason/.ssh/id_rsa RSA SHA256:FdLchiAgcXUf2u6eneY7hX/FX5NOwjWnBzpAWwyhN04 debug3: sign_and_send_pubkey: RSA SHA256:FdLchiAgcXUf2u6eneY7hX/FX5NOwjWnBzpAWwyhN04 debug3: sign_and_send_pubkey: signing using rsa-sha2-256 debug3: send packet: type 50 debug3: receive packet: type 52 debug1: Authentication succeeded (publickey). Authenticated to github.com ([140.82.118.4]:22). debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug3: send packet: type 90 debug1: Entering interactive session. debug1: pledge: network debug3: receive packet: type 91 debug2: channel_input_open_confirmation: channel 0: callback start debug2: fd 3 setting TCP_NODELAY debug3: ssh_packet_set_tos: set IP_TOS 0x20 debug2: client_session2_setup: id 0 debug1: Sending environment. debug3: Ignored env LS_COLORS debug3: Ignored env _ debug1: Sending env LANG = en_US.UTF-8 debug2: channel 0: request env confirm 0 debug3: send packet: type 98 debug3: Ignored env OLDPWD debug3: Ignored env container debug3: Ignored env XDG_SESSION_ID debug3: Ignored env HUSHLOGIN debug3: Ignored env USER debug3: Ignored env PWD debug3: Ignored env HOME debug3: Ignored env GIT_SSH_COMMAND debug3: Ignored env MAIL debug3: Ignored env GIT_EXEC_PATH debug3: Ignored env TERM debug3: Ignored env SHELL debug3: Ignored env LS_OPTIONS debug3: Ignored env SHLVL debug1: Sending env LANGUAGE = en_US:en debug2: channel 0: request env confirm 0 debug3: send packet: type 98 debug3: Ignored env LOGNAME debug3: Ignored env DBUS_SESSION_BUS_ADDRESS debug3: Ignored env XDG_RUNTIME_DIR debug3: Ignored env PATH debug3: Ignored env LESSOPEN debug1: Sending command: git-upload-pack 'LiuZixia/RShinyProjects.git' debug2: channel 0: request exec confirm 1 debug3: send packet: type 98 debug2: channel_input_open_confirmation: channel 0: callback done debug2: channel 0: open confirm rwindow 32000 rmax 35000 debug3: receive packet: type 99 debug2: channel_input_status_confirm: type 99 id 0 debug2: exec request accepted on channel 0 debug2: channel 0: rcvd adjust 1248207 remote: Enumerating objects: 5, done. remote: Counting objects: 100% (5/5), done. remote: Compressing objects: 100% (4/4), done. debug3: receive packet: type 98 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 remote: Total 5 (delta 0), reused 0 (delta 0), pack-reused 0 Receiving objects: 100% (5/5), done. debug2: channel 0: read<=0 rfd 4 len 0 debug2: channel 0: read failed debug2: channel 0: chan_shutdown_read (i0 o0 sock -1 wfd 4 efd 6 [write]) debug2: channel 0: input open -> drain debug2: channel 0: ibuf empty debug2: channel 0: send eof debug3: send packet: type 96 debug2: channel 0: input drain -> closed debug3: receive packet: type 96 debug2: channel 0: rcvd eof debug2: channel 0: output open -> drain debug2: channel 0: obuf empty debug2: channel 0: chan_shutdown_write (i3 o1 sock -1 wfd 5 efd 6 [write]) debug2: channel 0: output drain -> closed debug3: receive packet: type 97 debug2: channel 0: rcvd close debug3: channel 0: will not send data after close debug2: channel 0: almost dead debug2: channel 0: gc: notify user debug2: channel 0: gc: user detached debug2: channel 0: send close debug3: send packet: type 97 debug2: channel 0: is dead debug2: channel 0: garbage collecting debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r43 i3/0 o3/0 e[write]/0 fd -1/-1/6 sock -1 cc -1) debug3: send packet: type 1 debug1: fd 0 clearing O_NONBLOCK debug3: fd 1 is not O_NONBLOCK Transferred: sent 3256, received 7212 bytes, in 0.4 seconds Bytes per second: sent 7301.5, received 16172.7 debug1: Exit status 0
This article is under CC BY-NC-SA 4.0 license.
Please quote the original link：https://www.liujason.com/article/533.html
Please quote the original link：https://www.liujason.com/article/533.html
