# To students: this is sample output when I connect from my local machine (minibox) to granger1, with cs portal as the jumphost. # My usernames on both minibox and granger1: xzl; my username on cs portal: xl6yq # From my local ~/.ssh/config Host granger1 User xzl HostName granger1.cs.virginia.edu ProxyJump xl6yq@portal.cs.virginia.edu:22 # ---- log starts --- # xzl@minibox[~]$ ssh -vv granger1 OpenSSH_7.6p1 Ubuntu-4ubuntu0.5, OpenSSL 1.0.2n 7 Dec 2017 debug1: Reading configuration data /home/xzl/.ssh/config debug1: /home/xzl/.ssh/config line 1: Applying options for * debug1: /home/xzl/.ssh/config line 115: Applying options for granger1 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Setting implicit ProxyCommand from ProxyJump: ssh -l xl6yq -p 22 -vv -W '[%h]:%p' portal.cs.virginia.edu debug1: Executing proxy command: exec ssh -l xl6yq -p 22 -vv -W '[granger1.cs.virginia.edu]:22' portal.cs.virginia.edu debug1: permanently_drop_suid: 1000 debug1: identity file /home/xzl/.ssh/id_rsa type 0 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_rsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_dsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_dsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ecdsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ecdsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ed25519 type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ed25519-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.5 OpenSSH_7.6p1 Ubuntu-4ubuntu0.5, OpenSSL 1.0.2n 7 Dec 2017 debug1: Reading configuration data /home/xzl/.ssh/config debug1: /home/xzl/.ssh/config line 1: Applying options for * debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: resolving "portal.cs.virginia.edu" port 22 debug2: ssh_connect_direct: needpriv 0 debug1: Connecting to portal.cs.virginia.edu [128.143.69.111] port 22. debug1: Connection established. debug1: identity file /home/xzl/.ssh/id_rsa type 0 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_rsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_dsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_dsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ecdsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ecdsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ed25519 type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/xzl/.ssh/id_ed25519-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.5 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4 debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000 debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to portal.cs.virginia.edu:22 as 'xl6yq' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: local client KEXINIT proposal debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.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,ext-info-c debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@openssh.com,zlib debug2: compression stoc: none,zlib@openssh.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-sha256@libssh.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-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@openssh.com debug2: compression stoc: none,zlib@openssh.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: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ecdsa-sha2-nistp256 SHA256:v4NRC7YTZ0njGcBj8QZ/jFwLGhrnnk94OjfgO2+eUOA debug1: Host 'portal.cs.virginia.edu' is known and matches the ECDSA host key. debug1: Found key in /home/xzl/.ssh/known_hosts:258 debug2: set_newkeys: mode 1 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug2: set_newkeys: mode 0 debug1: rekey after 134217728 blocks debug2: key: /home/xzl/.ssh/id_rsa (0x55b04b9ebef0) debug2: key: /home/xzl/.ssh/id_dsa ((nil)) debug2: key: /home/xzl/.ssh/id_ecdsa ((nil)) debug2: key: /home/xzl/.ssh/id_ed25519 ((nil)) debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs= debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Offering public key: RSA SHA256:dDF3y7oQFOdzyEa/HmMEyUae/tbLFp3+40jf64NncBE /home/xzl/.ssh/id_rsa debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg rsa-sha2-512 blen 279 debug2: input_userauth_pk_ok: fp SHA256:dDF3y7oQFOdzyEa/HmMEyUae/tbLFp3+40jf64NncBE debug1: Authentication succeeded (publickey). Authenticated to portal.cs.virginia.edu ([128.143.69.111]:22). debug1: channel_connect_stdio_fwd granger1.cs.virginia.edu:22 debug1: channel 0: new [stdio-forward] debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug1: getpeername failed: Bad file descriptor debug2: fd 3 setting TCP_NODELAY debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: pledge: network debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 debug2: channel_input_open_confirmation: channel 0: callback start debug2: channel_input_open_confirmation: channel 0: callback done debug2: channel 0: open confirm rwindow 2097152 rmax 32768 debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1 Ubuntu-4ubuntu0.2 debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.2 pat OpenSSH* compat 0x04000000 debug2: fd 5 setting O_NONBLOCK debug2: fd 4 setting O_NONBLOCK debug1: Authenticating to granger1.cs.virginia.edu:22 as 'xzl' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: local client KEXINIT proposal debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.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,ext-info-c debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@openssh.com,zlib debug2: compression stoc: none,zlib@openssh.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-sha256@libssh.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 debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@openssh.com debug2: compression stoc: none,zlib@openssh.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: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ecdsa-sha2-nistp256 SHA256:nvLhPx470HwD4TKKayODNQULM6H+mVnDvMECTola/Po debug1: Host 'granger1.cs.virginia.edu' is known and matches the ECDSA host key. debug1: Found key in /home/xzl/.ssh/known_hosts:264 debug2: set_newkeys: mode 1 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug2: set_newkeys: mode 0 debug1: rekey after 134217728 blocks debug2: key: /home/xzl/.ssh/id_rsa (0x55d944c1ea40) debug2: key: /home/xzl/.ssh/id_dsa ((nil)) debug2: key: /home/xzl/.ssh/id_ecdsa ((nil)) debug2: key: /home/xzl/.ssh/id_ed25519 ((nil)) debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs= debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Offering public key: RSA SHA256:dDF3y7oQFOdzyEa/HmMEyUae/tbLFp3+40jf64NncBE /home/xzl/.ssh/id_rsa debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg rsa-sha2-512 blen 279 debug2: input_userauth_pk_ok: fp SHA256:dDF3y7oQFOdzyEa/HmMEyUae/tbLFp3+40jf64NncBE debug1: Authentication succeeded (publickey). Authenticated to granger1.cs.virginia.edu (via proxy). debug1: channel 0: new [client-session] debug2: channel 0: send open debug1: Requesting no-more-sessions@openssh.com debug1: Entering interactive session. debug1: pledge: proc debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0 debug1: Remote: /home/xzl/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding debug1: Remote: /home/xzl/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding debug2: channel_input_open_confirmation: channel 0: callback start debug2: client_session2_setup: id 0 debug2: channel 0: request pty-req confirm 1 debug1: Sending environment. debug1: Sending env LANG = en_US.UTF-8 debug2: channel 0: request env confirm 0 debug2: channel 0: request shell confirm 1 debug2: channel_input_open_confirmation: channel 0: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: channel_input_status_confirm: type 99 id 0 debug2: PTY allocation request accepted on channel 0 debug2: channel 0: rcvd adjust 2097152 debug2: channel_input_status_confirm: type 99 id 0 debug2: shell request accepted on channel 0 Welcome to Ubuntu 20.04 LTS (GNU/Linux 5.4.0-92-generic x86_64) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/advantage System information as of Sun 23 Jan 2022 02:50:35 PM UTC System load: 0.01 Temperature: 65.0 C Usage of /: 76.2% of 1.77TB Processes: 531 Memory usage: 4% Users logged in: 2 Swap usage: 0% IPv4 address for eno1: 128.143.63.230 193 updates can be installed immediately. 1 of these updates is a security update. To see these additional updates run: apt list --upgradable *** System restart required *** Last login: Sun Jan 23 14:50:18 2022 from 128.143.69.111 xzl@granger1[~]$