Вход по SSH занимает 15 секунд

SSH-вход занимает 15 секунд

У меня есть два устройства:

• WSL для Windows: OpenSSH_7.6p1 Ubuntu-4ubuntu0.5, OpenSSL 1.0.2n 7 декабря 2017 г.
• Под управлением Raspbian: OpenSSH_7.9p1 Raspbian-10+deb10u2, OpenSSL 1.1.1d 10 сентября 2019 г.

И сервер Centos 8.

Первый (WSL) требует 15 секунд для входа на сервер с помощью пароля или открытого ключа. Raspbian находится на среднем уровне. Я использую ip для подключения с обоих устройств.

Я установил для журнала демона ssh на сервере значение debug3 и не увидел большой разницы между двумя входами в систему, хотя здесь я вижу 15-секундную задержку:

Oct 17 09:13:20 localhost sshd[2080]: debug3: userauth_finish: failure partial=0 next methods="publickey,gssapi-keyex,gssapi-with-mic,password" [preauth]
Oct 17 09:13:20 localhost sshd[2080]: debug3: send packet: type 51 [preauth]
Oct 17 09:13:20 localhost sshd[1979]: debug2: channel 0: rcvd adjust 50867
Oct 17 09:13:36 localhost sshd[2080]: debug3: receive packet: type 50 [preauth]
Oct 17 09:13:36 localhost sshd[2080]: debug1: userauth-request for user marco service ssh-connection method publickey [preauth]

Есть какие-нибудь подсказки, что мне следует искать?

]Это вывод ssh -vvv, я добавил метку времени

[2021-10-21 19:53:13] debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
[2021-10-21 19:53:13] debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password
[2021-10-21 19:53:13] debug3: preferred gssapi-with-mic,publickey,keyboard-interactive,password
[2021-10-21 19:53:13] debug3: authmethod_lookup gssapi-with-mic
[2021-10-21 19:53:13] debug3: remaining preferred: publickey,keyboard-interactive,password
[2021-10-21 19:53:13] debug3: authmethod_is_enabled gssapi-with-mic
[2021-10-21 19:53:13] debug1: Next authentication method: gssapi-with-mic
[2021-10-21 19:53:22] debug1: Unspecified GSS failure.  Minor code may provide more information
[2021-10-21 19:53:22] No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_1000)
[2021-10-21 19:53:22] 
[2021-10-21 19:53:22] 
[2021-10-21 19:53:33] debug1: Unspecified GSS failure.  Minor code may provide more information
[2021-10-21 19:53:33] No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_1000)
[2021-10-21 19:53:33] 
[2021-10-21 19:53:33] 
[2021-10-21 19:53:33] debug2: we did not send a packet, disable method
[2021-10-21 19:53:33] debug3: authmethod_lookup publickey
[2021-10-21 19:53:33] debug3: remaining preferred: keyboard-interactive,password
[2021-10-21 19:53:33] debug3: authmethod_is_enabled publickey
[2021-10-21 19:53:33] debug1: Next authentication method: publickey
[2021-10-21 19:53:33] debug1: Offering public key: /home/marco/.ssh/id_rsa RSA SHA256:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
[2021-10-21 19:53:33] debug3: send packet: type 50
[2021-10-21 19:53:34] debug2: we sent a publickey packet, wait for reply
[2021-10-21 19:53:34] debug3: receive packet: type 51
[2021-10-21 19:53:34] debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
[2021-10-21 19:53:34] debug1: Trying private key: /home/marco/.ssh/id_dsa
[2021-10-21 19:53:34] debug3: no such identity: /home/marco/.ssh/id_dsa: No such file or directory
[2021-10-21 19:53:34] debug1: Trying private key: /home/marco/.ssh/id_ecdsa
[2021-10-21 19:53:34] debug3: no such identity: /home/marco/.ssh/id_ecdsa: No such file or directory
[2021-10-21 19:53:34] debug1: Trying private key: /home/marco/.ssh/id_ecdsa_sk
[2021-10-21 19:53:34] debug3: no such identity: /home/marco/.ssh/id_ecdsa_sk: No such file or directory
[2021-10-21 19:53:34] debug1: Trying private key: /home/marco/.ssh/id_ed25519
[2021-10-21 19:53:34] debug3: no such identity: /home/marco/.ssh/id_ed25519: No such file or directory
[2021-10-21 19:53:34] debug1: Trying private key: /home/marco/.ssh/id_ed25519_sk
[2021-10-21 19:53:34] debug3: no such identity: /home/marco/.ssh/id_ed25519_sk: No such file or directory
[2021-10-21 19:53:34] debug1: Trying private key: /home/marco/.ssh/id_xmss
[2021-10-21 19:53:34] debug3: no such identity: /home/marco/.ssh/id_xmss: No such file or directory
[2021-10-21 19:53:34] debug2: we did not send a packet, disable method
[2021-10-21 19:53:34] debug3: authmethod_lookup password
[2021-10-21 19:53:34] debug3: remaining preferred: ,password
[2021-10-21 19:53:34] debug3: authmethod_is_enabled password
[2021-10-21 19:53:34] debug1: Next authentication method: password