Output with -vvv:
OpenSSH_9.2p1, OpenSSL 3.0.8 7 Feb 2023
debug1: Reading configuration data /home/maciej/.ssh/config
debug1: /home/maciej/.ssh/config line 50: Applying options for yggdrasil
debug1: Reading configuration data /etc/ssh/ssh_config
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/home/maciej/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/home/maciej/.ssh/known_hosts2'
debug2: resolving "login1.yggdrasil.hpc.unige.ch" port 22
debug3: resolve_host: lookup login1.yggdrasil.hpc.unige.ch:22
debug3: ssh_connect_direct: entering
debug1: Connecting to login1.yggdrasil.hpc.unige.ch [129.194.64.11] port 22.
debug3: set_sock_tos: set socket 3 IP_TOS 0x48
debug1: Connection established.
debug1: identity file /home/maciej/.ssh/id_rsa type 0
debug1: identity file /home/maciej/.ssh/id_rsa-cert type -1
debug1: identity file /home/maciej/.ssh/id_ecdsa type -1
debug1: identity file /home/maciej/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/maciej/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/maciej/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/maciej/.ssh/id_ed25519 type -1
debug1: identity file /home/maciej/.ssh/id_ed25519-cert type -1
debug1: identity file /home/maciej/.ssh/id_ed25519_sk type -1
debug1: identity file /home/maciej/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/maciej/.ssh/id_xmss type -1
debug1: identity file /home/maciej/.ssh/id_xmss-cert type -1
debug1: identity file /home/maciej/.ssh/id_dsa type -1
debug1: identity file /home/maciej/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.2
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 login1.yggdrasil.hpc.unige.ch:22 as 'falkiewi'
debug3: record_hostkey: found key type RSA in file /home/maciej/.ssh/known_hosts:12
debug3: load_hostkeys_file: loaded 1 keys from login1.yggdrasil.hpc.unige.ch
debug1: load_hostkeys: fopen /home/maciej/.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: prefer hostkeyalgs: rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256
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-sha512@openssh.com,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,ext-info-c
debug2: host key algorithms: rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com
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
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: rsa-sha2-512
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.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-rsa SHA256:tKqp4nljL+EGVKl8T0VF2nS36DkHVFMpLxQOPg/gKvg
debug3: record_hostkey: found key type RSA in file /home/maciej/.ssh/known_hosts:12
debug3: load_hostkeys_file: loaded 1 keys from login1.yggdrasil.hpc.unige.ch
debug1: load_hostkeys: fopen /home/maciej/.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 'login1.yggdrasil.hpc.unige.ch' is known and matches the RSA host key.
debug1: Found key in /home/maciej/.ssh/known_hosts:12
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 '/run/user/1000/keyring/ssh'
debug1: get_agent_identities: bound agent to hostkey
debug1: get_agent_identities: agent returned 5 keys
debug1: Will attempt key: /home/maciej/.ssh/id_rsa RSA SHA256:xzY1NdMhPeJqs/0ZbhG58j/+4/PnPFH6LU6B33SZkmY agent
debug1: Will attempt key: maciej.falkiewicz@hesge.ch ED25519 SHA256:B/sTrer+6Pr5txgSjUGro7RzvnP9KcHbVnLSMure4h0 agent
debug1: Will attempt key: maciej.falkiewicz@growbots.com RSA SHA256:MUuRXFkW7E8vaLmGSucmbcn121KX3iGjHOh/4KR9ECk agent
debug1: Will attempt key: maciej@maciej-t480 RSA SHA256:cktahxU2vS07gxMkpviFQxN+uwvOvn1ob+KXsMmQOy0 agent
debug1: Will attempt key: falkiewicz.maciej@gmail.com RSA SHA256:bu/iUXvpFBK2E1HXvwr9zQnLHd+zCIDuQsAPg0iiJRI agent
debug1: Will attempt key: /home/maciej/.ssh/id_ecdsa
debug1: Will attempt key: /home/maciej/.ssh/id_ecdsa_sk
debug1: Will attempt key: /home/maciej/.ssh/id_ed25519
debug1: Will attempt key: /home/maciej/.ssh/id_ed25519_sk
debug1: Will attempt key: /home/maciej/.ssh/id_xmss
debug1: Will attempt key: /home/maciej/.ssh/id_dsa
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=<rsa-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,password,keyboard-interactive,hostbased
debug3: start over, passed a different list publickey,password,keyboard-interactive,hostbased
debug3: preferred 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/maciej/.ssh/id_rsa RSA SHA256:xzY1NdMhPeJqs/0ZbhG58j/+4/PnPFH6LU6B33SZkmY agent
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: /home/maciej/.ssh/id_rsa RSA SHA256:xzY1NdMhPeJqs/0ZbhG58j/+4/PnPFH6LU6B33SZkmY agent
debug3: sign_and_send_pubkey: using publickey with RSA SHA256:xzY1NdMhPeJqs/0ZbhG58j/+4/PnPFH6LU6B33SZkmY
debug3: sign_and_send_pubkey: signing using rsa-sha2-512 SHA256:xzY1NdMhPeJqs/0ZbhG58j/+4/PnPFH6LU6B33SZkmY
debug3: send packet: type 50
debug3: receive packet: type 52
Authenticated to login1.yggdrasil.hpc.unige.ch ([129.194.64.11]:22) using "publickey".
debug1: channel 0: new session [client-session] (inactive timeout: 0)
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: filesystem
debug3: client_repledge: enter
debug3: receive packet: type 80
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug3: client_input_hostkeys: received RSA key SHA256:tKqp4nljL+EGVKl8T0VF2nS36DkHVFMpLxQOPg/gKvg
debug1: client_input_hostkeys: searching /home/maciej/.ssh/known_hosts for login1.yggdrasil.hpc.unige.ch / (none)
debug3: hostkeys_foreach: reading file "/home/maciej/.ssh/known_hosts"
debug3: hostkeys_find: found ssh-rsa key under different name/addr at /home/maciej/.ssh/known_hosts:9
debug3: hostkeys_find: found ssh-rsa key at /home/maciej/.ssh/known_hosts:12
debug3: hostkeys_find: found ssh-rsa key under different name/addr at /home/maciej/.ssh/known_hosts:16
debug1: client_input_hostkeys: searching /home/maciej/.ssh/known_hosts2 for login1.yggdrasil.hpc.unige.ch / (none)
debug1: client_input_hostkeys: hostkeys file /home/maciej/.ssh/known_hosts2 does not exist
debug3: client_input_hostkeys: 1 server keys: 0 new, 1 retained, 0 incomplete match. 0 to remove
debug1: client_input_hostkeys: no new or deprecated keys from server
debug3: client_repledge: enter
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug3: ssh_get_authentication_socket_path: path '/run/user/1000/keyring/ssh'
debug1: Requesting authentication agent forwarding.
debug2: channel 0: request auth-agent-req@openssh.com confirm 0
debug3: send packet: type 98
debug2: fd 3 setting TCP_NODELAY
debug3: set_sock_tos: set socket 3 IP_TOS 0x48
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug2: channel 0: request shell confirm 1
debug3: send packet: type 98
debug3: client_repledge: enter
debug1: pledge: agent
debug2: channel_input_open_confirmation: channel 0: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
But now I managed to open shell. It still takes some seconds since seeing support: hpc@unige.ch until bash launches, but eventually, it triggers. When I opened the thread it was after several unsuccessful tries within ~1h period. Let’s say the problem is solved.
Thank you for the quick reply!