Need help

Wed May 17 10:23:23 UTC 2023

Hi All,

I have an ubuntu server version 20.04. The ssh client is waiting at the
below point for the server and timing out eventually by the ssh server:

----
# ssh -vvvv   10.42.109.22
OpenSSH_8.2p1 Ubuntu-4ubuntu0.5, OpenSSL 1.1.1f  31 Mar 2020
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 10.42.109.22 is address
debug2: ssh_connect_direct
debug1: Connecting to 10.42.109.22 [10.42.109.22] port 22.
debug1: Connection established.
debug1: identity file /root/.ssh/id_rsa type 0
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_ecdsa_sk type -1
debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: identity file /root/.ssh/id_ed25519_sk type -1
debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /root/.ssh/id_xmss type -1
debug1: identity file /root/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.5
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1
Ubuntu-4ubuntu0.4
debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.4 pat OpenSSH* compat
0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.42.109.22:22 as 'root'
debug3: hostkeys_foreach: reading file "/root/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file
/root/.ssh/known_hosts:739
debug3: load_hostkeys: loaded 1 keys from 10.42.109.22
debug3: order_hostkeyalgs: prefer hostkeyalgs:
ecdsa-sha2-nistp256-cert-v01 at openssh.com,
ecdsa-sha2-nistp384-cert-v01 at openssh.com,
ecdsa-sha2-nistp521-cert-v01 at openssh.com
,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
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,curve25519-sha256 at 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: ecdsa-sha2-nistp256-cert-v01 at openssh.com,
ecdsa-sha2-nistp384-cert-v01 at openssh.com,
ecdsa-sha2-nistp521-cert-v01 at openssh.com
,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
sk-ecdsa-sha2-nistp256-cert-v01 at openssh.com,ssh-ed25519-cert-v01 at openssh.com
,sk-ssh-ed25519-cert-v01 at openssh.com,rsa-sha2-512-cert-v01 at openssh.com,
rsa-sha2-256-cert-v01 at openssh.com,ssh-rsa-cert-v01 at openssh.com,
sk-ecdsa-sha2-nistp256 at openssh.com,ssh-ed25519,sk-ssh-ed25519 at openssh.com
,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20-poly1305 at openssh.com
,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm at openssh.com,
aes256-gcm at openssh.com
debug2: ciphers stoc: chacha20-poly1305 at openssh.com
,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm at openssh.com,
aes256-gcm at openssh.com
debug2: MACs ctos: umac-64-etm at openssh.com,umac-128-etm at openssh.com,
hmac-sha2-256-etm at openssh.com,hmac-sha2-512-etm at openssh.com,
hmac-sha1-etm at openssh.com,umac-64 at openssh.com,umac-128 at openssh.com
,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm at openssh.com,umac-128-etm at openssh.com,
hmac-sha2-256-etm at openssh.com,hmac-sha2-512-etm at openssh.com,
hmac-sha1-etm at openssh.com,umac-64 at openssh.com,umac-128 at openssh.com
,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib at openssh.com,zlib
debug2: compression stoc: none,zlib at 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 at 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:
aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
debug2: ciphers stoc:
aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
debug2: MACs ctos: hmac-sha1
debug2: MACs stoc: hmac-sha1
debug2: compression ctos: none,zlib at openssh.com
debug2: compression stoc: none,zlib at 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: aes128-ctr MAC: hmac-sha1 compression:
none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha1 compression:
none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256
SHA256:FAPqVWZGRzQR8BiuO4nqcrgnumEvClZ+YO4O+DJfw04
debug3: hostkeys_foreach: reading file "/root/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file
/root/.ssh/known_hosts:739
debug3: load_hostkeys: loaded 1 keys from 10.42.109.22
debug1: Host '10.42.109.22' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/known_hosts:739
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: /root/.ssh/id_rsa RSA
SHA256:nxdydot5FEz2Nn77XWi6mr0wu4vPFVN3nyWeWJ6YlKw
debug1: Will attempt key: /root/.ssh/id_dsa
debug1: Will attempt key: /root/.ssh/id_ecdsa
debug1: Will attempt key: /root/.ssh/id_ecdsa_sk
debug1: Will attempt key: /root/.ssh/id_ed25519
debug1: Will attempt key: /root/.ssh/id_ed25519_sk
debug1: Will attempt key: /root/.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,
sk-ssh-ed25519 at openssh.com
,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
sk-ecdsa-sha2-nistp256 at openssh.com>
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,keyboard-interactive
debug3: start over, passed a different list publickey,keyboard-interactive
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: /root/.ssh/id_rsa RSA
SHA256:nxdydot5FEz2Nn77XWi6mr0wu4vPFVN3nyWeWJ6YlKw
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply

Connection closed by 10.42.109.22 port 22
----

How can I terminate the client connection without waiting for a long time ?
The connect timeout option is not working in this case. Please help me....

Thanks
Kumar
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