TeratermやWinSCPでCentOS7サーバーに接続すると50秒で切断されてしまいます。  
当該事象が発生するのは、このサーバー1台で他のサーバーは正常です。  
そのため、TeratermやWinSCPの設定ではないと思っていますまた、設定も確認しています。

サーバー側の設定としては、sshd_configの設定を2か所を以下のように変更し、  
sshdを再起動（systemctl restart sshd）しましたが、結果は変わりません。

```

    ClientAliveInterval　180   
    ClientAliveCountMax 3
    
```

関係ないと思うのですが、外部から接続できないように、ルーターにIP制限を掛けて、特定のIPしかアクセスできない状態にしましたが、やはり結果は変わりませんでした。  
どなたか、同じ事象で解決された方はおりますでしょうか。  
ご教示いただけると幸いです。

以下がサーバのログです。（secure）

```

    Jul  1 00:07:59 APOLLO sshd[3545]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:08:02 APOLLO sshd[3541]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:08:14 APOLLO polkitd[668]: Registered Authentication Agent for unix-process:3647:234463 (system bus name :1.93 [/usr/bin/pkttyagent --notify-fd 5 --fallback], object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
    Jul  1 00:08:39 APOLLO polkit-agent-helper-1[3657]: pam_unix(polkit-1:auth): conversation failed
    Jul  1 00:08:39 APOLLO polkit-agent-helper-1[3657]: pam_unix(polkit-1:auth): auth could not identify password for [root]
    Jul  1 00:08:39 APOLLO polkit-agent-helper-1[3657]: pam_succeed_if(polkit-1:auth): requirement "uid >= 1000" not met by user "root"
    Jul  1 00:08:39 APOLLO polkitd[668]: Unregistered Authentication Agent for unix-process:3647:234463 (system bus name :1.93, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
    Jul  1 00:08:39 APOLLO polkitd[668]: Operator of unix-process:3647:234463 FAILED to authenticate to gain authorization for action org.freedesktop.systemd1.manage-units for system-bus-name::1.94 [<unknown>] (owned by unix-user:ij*********)
    Jul  1 00:08:46 APOLLO polkitd[668]: Registered Authentication Agent for unix-process:3664:237631 (system bus name :1.98 [/usr/bin/pkttyagent --notify-fd 5 --fallback], object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
    Jul  1 00:08:50 APOLLO polkitd[668]: Operator of unix-process:3664:237631 successfully authenticated as unix-user:root to gain ONE-SHOT authorization for action org.freedesktop.systemd1.manage-units for system-bus-name::1.99 [systemctl restart sshd] (owned by unix-user:ij*********)
    Jul  1 00:08:50 APOLLO polkitd[668]: Unregistered Authentication Agent for unix-process:3664:237631 (system bus name :1.98, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
    Jul  1 00:08:51 APOLLO sshd[3545]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:09:02 APOLLO sshd[3682]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:09:53 APOLLO sshd[3682]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:10:04 APOLLO sshd[3741]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:10:55 APOLLO sshd[3741]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:11:14 APOLLO sshd[3802]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:11:17 APOLLO sshd[3541]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:12:12 APOLLO sshd[3802]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:12:30 APOLLO sshd[3894]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:13:25 APOLLO sshd[3894]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:13:44 APOLLO sshd[3943]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:14:39 APOLLO sshd[3943]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:14:58 APOLLO sshd[4004]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:15:52 APOLLO sshd[4004]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:16:02 APOLLO sshd[4052]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:16:54 APOLLO sshd[4052]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:17:04 APOLLO sshd[4113]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:17:56 APOLLO sshd[4113]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:18:06 APOLLO sshd[4162]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:18:57 APOLLO sshd[4162]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:19:08 APOLLO sshd[4223]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:19:59 APOLLO sshd[4223]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:20:09 APOLLO sshd[4278]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:21:01 APOLLO sshd[4278]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:21:11 APOLLO sshd[4339]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:22:02 APOLLO sshd[4339]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:22:13 APOLLO sshd[4387]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:23:04 APOLLO sshd[4387]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:23:15 APOLLO sshd[4448]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:24:07 APOLLO sshd[4448]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:24:17 APOLLO sshd[4496]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:25:09 APOLLO sshd[4496]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:25:19 APOLLO sshd[4558]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:26:11 APOLLO sshd[4558]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:26:21 APOLLO sshd[4606]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:27:12 APOLLO sshd[4606]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:27:22 APOLLO sshd[4667]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:28:14 APOLLO sshd[4667]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:28:24 APOLLO sshd[4716]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:29:15 APOLLO sshd[4716]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:29:26 APOLLO sshd[4777]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:30:18 APOLLO sshd[4777]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:30:28 APOLLO sshd[4830]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:31:19 APOLLO sshd[4830]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:31:29 APOLLO sshd[4891]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:32:21 APOLLO sshd[4891]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 00:32:31 APOLLO sshd[4984]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 00:33:22 APOLLO sshd[4984]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:21:47 APOLLO sshd[25313]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:23:46 APOLLO sshd[25313]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:23:50 APOLLO sshd[25359]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:23:56 APOLLO sshd[25450]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:24:36 APOLLO su: pam_unix(su:auth): authentication failure; logname=ij********* uid=1001 euid=0 tty=pts/0 ruser=ij********* rhost=  user=root
    Jul  1 09:24:36 APOLLO su: pam_succeed_if(su:auth): requirement "uid >= 1000" not met by user "root"
    Jul  1 09:24:48 APOLLO sshd[25450]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:24:48 APOLLO su: pam_unix(su:auth): authentication failure; logname=ij********* uid=1001 euid=0 tty=pts/0 ruser=ij********* rhost=  user=root
    Jul  1 09:24:48 APOLLO su: pam_succeed_if(su:auth): requirement "uid >= 1000" not met by user "root"
    Jul  1 09:24:58 APOLLO sshd[25508]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:25:07 APOLLO su: pam_unix(su:auth): authentication failure; logname=ij********* uid=1001 euid=0 tty=pts/0 ruser=ij********* rhost=  user=root
    Jul  1 09:25:07 APOLLO su: pam_succeed_if(su:auth): requirement "uid >= 1000" not met by user "root"
    Jul  1 09:25:50 APOLLO sshd[25508]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:26:00 APOLLO sshd[25359]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:26:01 APOLLO sshd[25574]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:26:53 APOLLO sshd[25574]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:27:01 APOLLO sshd[25620]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:27:04 APOLLO sshd[25667]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:27:10 APOLLO su: pam_unix(su:session): session opened for user root by ij*********(uid=1001)
    Jul  1 09:27:56 APOLLO sshd[25667]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:28:06 APOLLO sshd[25765]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:28:51 APOLLO su: pam_unix(su:session): session closed for user root
    Jul  1 09:28:51 APOLLO sshd[25620]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:28:58 APOLLO sshd[25765]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:29:08 APOLLO sshd[25814]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:30:09 APOLLO sshd[25814]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:30:20 APOLLO sshd[25915]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:31:11 APOLLO sshd[25915]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:31:21 APOLLO sshd[25976]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:31:36 APOLLO sshd[25991]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:31:44 APOLLO su: pam_unix(su:session): session opened for user root by ij*********(uid=1001)
    Jul  1 09:32:13 APOLLO sshd[25976]: pam_unix(sshd:session): session closed for user ij*********
    Jul  1 09:32:24 APOLLO sshd[26102]: pam_unix(sshd:session): session opened for user ij********* by (uid=0)
    Jul  1 09:32:45 APOLLO su: pam_unix(su:session): session opened for user root by ij*********(uid=0)
    Jul  1 09:33:15 APOLLO sshd[26102]: pam_unix(sshd:session): 
    
```

下記のWINSCPと該当するSECUREログを抜粋

```

    Jul  1 09:54:19 APOLLO sshd[27049]: pam_unix(sshd:session): session closed for user ijsRa2pS
    Jul  1 09:54:28 APOLLO sshd[27097]: pam_unix(sshd:session): session opened for user ijsRa2pS by (uid=0)
    Jul  1 09:55:20 APOLLO sshd[27097]: pam_unix(sshd:session): session closed for user ijsRa2pS
    Jul  1 09:55:30 APOLLO sshd[27158]: pam_unix(sshd:session): session opened for user ijsRa2pS by (uid=0)
    Jul  1 09:56:22 APOLLO sshd[27158]: pam_unix(sshd:session): session closed for user ijsRa2pS
    Jul  1 10:48:53 APOLLO sshd[29187]: pam_unix(sshd:session): session opened for user ijsRa2pS by (uid=0)
    
```

また、以下がWINSCPのログです。

```

    * 2023-07-01 09:54:18.927 (ESshFatal) サーバがネットワーク接続を閉じました
    . 2023-07-01 09:54:26.218 Looking up host "153.1.1.149" for SSH connection
    . 2023-07-01 09:54:26.218 Connecting to 153.1.1.149 port 22
    . 2023-07-01 09:54:26.274 We claim version: SSH-2.0-WinSCP_release_5.19.5
    . 2023-07-01 09:54:26.315 Remote version: SSH-2.0-OpenSSH_7.4
    . 2023-07-01 09:54:26.315 Using SSH protocol version 2
    . 2023-07-01 09:54:26.316 Have a known host key of type ssh-ed25519
    . 2023-07-01 09:54:26.383 Doing ECDH key exchange with curve Curve25519 and hash SHA-256
    . 2023-07-01 09:54:26.768 Server also has ecdsa-sha2-nistp256/ssh-rsa host keys, but we don't know any of them
    . 2023-07-01 09:54:26.768 Host key fingerprint is:
    . 2023-07-01 09:54:26.768 ssh-ed25519 255 96:39:1e:51:f0:a8:b5:f0:20:38:34:0e:e7:18:2a:86 o1zXSkn8MA2UzlvZGxCRKH4ymwPu532QgCoXFtWJ0oA=
    . 2023-07-01 09:54:26.775 Host key matches cached key
    . 2023-07-01 09:54:26.776 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] outbound encryption
    . 2023-07-01 09:54:26.776 Initialised HMAC-SHA-256 outbound MAC algorithm
    . 2023-07-01 09:54:26.776 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] inbound encryption
    . 2023-07-01 09:54:26.776 Initialised HMAC-SHA-256 inbound MAC algorithm
    ! 2023-07-01 09:54:27.045 Using username "ijsRa2pS".
    . 2023-07-01 09:54:27.106 Server offered these authentication methods: publickey,gssapi-keyex,gssapi-with-mic,password
    . 2023-07-01 09:54:27.106 Using SSPI from SECUR32.DLL
    . 2023-07-01 09:54:27.106 Trying gssapi-with-mic...
    . 2023-07-01 09:54:27.106 Attempting GSSAPI authentication
    . 2023-07-01 09:54:27.124 GSSAPI authentication request refused
    . 2023-07-01 09:54:27.124 Server offered these authentication methods: publickey,gssapi-keyex,gssapi-with-mic,password
    . 2023-07-01 09:54:27.124 Prompt (password, "SSH password", <no instructions>, "パスワード(&P): ")
    . 2023-07-01 09:54:27.124 Using stored password.
    . 2023-07-01 09:54:27.157 Sent password
    . 2023-07-01 09:54:27.279 Access granted
    . 2023-07-01 09:54:27.280 Opening main session channel
    . 2023-07-01 09:54:27.330 Opened main channel
    . 2023-07-01 09:54:27.368 Started a shell/command
    . 2023-07-01 09:54:27.429 Doing startup conversation with host.
    > 2023-07-01 09:54:27.469 Type: SSH_FXP_INIT, Size: 5, Number: -1
    < 2023-07-01 09:54:27.489 Type: SSH_FXP_VERSION, Size: 150, Number: -1
    . 2023-07-01 09:54:27.490 SFTP version 3 negotiated.
    . 2023-07-01 09:54:27.490 Unknown server extension posix-rename@openssh.com="1"
    . 2023-07-01 09:54:27.490 Supports statvfs@openssh.com extension version "2"
    . 2023-07-01 09:54:27.490 Unknown server extension fstatvfs@openssh.com="2"
    . 2023-07-01 09:54:27.490 Supports hardlink@openssh.com extension version "1"
    . 2023-07-01 09:54:27.490 Unknown server extension fsync@openssh.com="1"
    . 2023-07-01 09:54:27.490 We believe the server has signed timestamps bug
    . 2023-07-01 09:54:27.490 We will use UTF-8 strings until server sends an invalid UTF-8 string as with SFTP version 3 and older UTF-8 strings are not mandatory
    . 2023-07-01 09:54:27.490 Limiting packet size to OpenSSH sftp-server limit of 262148 bytes
    . 2023-07-01 09:54:27.490 Changing directory to "/var".
    . 2023-07-01 09:54:27.490 Getting real path for '/var'
    > 2023-07-01 09:54:27.490 Type: SSH_FXP_REALPATH, Size: 13, Number: 37623312
    < 2023-07-01 09:54:27.497 Type: SSH_FXP_NAME, Size: 29, Number: 37623312
    . 2023-07-01 09:54:27.497 Real path is '/var'
    . 2023-07-01 09:54:27.497 Trying to open directory "/var".
    > 2023-07-01 09:54:27.497 Type: SSH_FXP_LSTAT, Size: 13, Number: 37623559
    < 2023-07-01 09:54:27.554 Type: SSH_FXP_ATTRS, Size: 37, Number: 37623559
    . 2023-07-01 09:54:27.554 Getting current directory name.
    . 2023-07-01 09:54:27.658 Directory content loaded from cache.
    . 2023-07-01 09:54:27.775 Cached directory not reloaded.
    . 2023-07-01 09:54:27.815 Listing directory "/var".
    > 2023-07-01 09:54:27.815 Type: SSH_FXP_OPENDIR, Size: 13, Number: 37623819
    < 2023-07-01 09:54:27.847 Type: SSH_FXP_HANDLE, Size: 13, Number: 37623819
    > 2023-07-01 09:54:27.847 Type: SSH_FXP_READDIR, Size: 13, Number: 37624076
    < 2023-07-01 09:54:27.894 Type: SSH_FXP_NAME, Size: 2825, Number: 37624076
    > 2023-07-01 09:54:27.894 Type: SSH_FXP_READDIR, Size: 13, Number: 37624332
    . 2023-07-01 09:54:27.894 Reading symlink "run".
    > 2023-07-01 09:54:27.894 Type: SSH_FXP_READLINK, Size: 17, Number: 37624595
    > 2023-07-01 09:54:27.895 Type: SSH_FXP_STAT, Size: 17, Number: 37624849
    < 2023-07-01 09:54:27.899 Type: SSH_FXP_STATUS, Size: 28, Number: 37624332
    . 2023-07-01 09:54:27.899 Storing reserved response
    < 2023-07-01 09:54:27.899 Type: SSH_FXP_NAME, Size: 33, Number: 37624595
    . 2023-07-01 09:54:27.899 Link resolved to "../run".
    < 2023-07-01 09:54:27.904 Type: SSH_FXP_ATTRS, Size: 37, Number: 37624849
    . 2023-07-01 09:54:27.904 Reading symlink "lock".
    > 2023-07-01 09:54:27.904 Type: SSH_FXP_READLINK, Size: 18, Number: 37625107
    > 2023-07-01 09:54:27.904 Type: SSH_FXP_STAT, Size: 18, Number: 37625361
    < 2023-07-01 09:54:27.913 Type: SSH_FXP_NAME, Size: 43, Number: 37625107
    . 2023-07-01 09:54:27.913 Link resolved to "../run/lock".
    < 2023-07-01 09:54:27.913 Type: SSH_FXP_ATTRS, Size: 37, Number: 37625361
    . 2023-07-01 09:54:27.939 Reading symlink "mail".
    > 2023-07-01 09:54:27.939 Type: SSH_FXP_READLINK, Size: 18, Number: 37625619
    > 2023-07-01 09:54:27.940 Type: SSH_FXP_STAT, Size: 18, Number: 37625873
    < 2023-07-01 09:54:27.946 Type: SSH_FXP_NAME, Size: 41, Number: 37625619
    . 2023-07-01 09:54:27.946 Link resolved to "spool/mail".
    < 2023-07-01 09:54:27.946 Type: SSH_FXP_ATTRS, Size: 37, Number: 37625873
    < 2023-07-01 09:54:27.955 Status code: 1
    > 2023-07-01 09:54:27.955 Type: SSH_FXP_CLOSE, Size: 13, Number: 37626116
    . 2023-07-01 09:54:27.955 ..;d;0;2020-04-12T02:31:11.000Z;3;"root" [0];"root" [0];r-xr-xr-x;0
    . 2023-07-01 09:54:27.955 lib;d;0;2020-04-12T02:33:48.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.955 run;l;0;2016-01-14T10:10:25.000Z;3;"root" [0];"root" [0];rwxrwxrwx;1
    . 2023-07-01 09:54:27.955 lock;l;0;2016-01-14T10:10:25.000Z;3;"root" [0];"root" [0];rwxrwxrwx;1
    . 2023-07-01 09:54:27.955 log;d;0;2023-06-30T18:08:01.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.955 adm;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.955 cache;d;0;2023-06-30T14:29:52.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.955 db;d;0;2020-04-12T02:31:25.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.955 empty;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 games;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 gopher;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 local;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 mail;l;0;2020-04-12T02:31:12.000Z;3;"root" [0];"root" [0];rwxrwxrwx;1
    . 2023-07-01 09:54:27.956 nis;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 opt;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 preserve;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 spool;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 tmp;d;0;2023-07-01T00:32:07.000Z;3;"root" [0];"root" [0];rwxrwxrwt;1
    . 2023-07-01 09:54:27.956 yp;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 kerberos;d;0;2019-09-13T18:05:33.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 var;d;0;2016-01-14T10:12:33.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 crash;d;0;2019-08-08T11:41:21.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 account;d;0;2017-08-03T09:00:53.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 .updated;-;163;2020-04-12T02:31:12.000Z;3;"root" [0];"root" [0];rw-r--r--;2
    . 2023-07-01 09:54:27.956 www;d;0;2023-06-30T14:57:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:27.956 ftp;d;0;2020-05-28T12:07:56.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:54:28.039 Startup conversation with host finished.
    . 2023-07-01 09:55:19.933 Remote side unexpectedly closed network connection
    * 2023-07-01 09:55:19.933 (ESshFatal) サーバがネットワーク接続を閉じました
    . 2023-07-01 09:55:29.159 Looking up host "153.1.1.149" for SSH connection
    . 2023-07-01 09:55:29.160 Connecting to 153.1.1.149 port 22
    . 2023-07-01 09:55:29.224 We claim version: SSH-2.0-WinSCP_release_5.19.5
    . 2023-07-01 09:55:29.225 Remote version: SSH-2.0-OpenSSH_7.4
    . 2023-07-01 09:55:29.226 Using SSH protocol version 2
    . 2023-07-01 09:55:29.228 Have a known host key of type ssh-ed25519
    . 2023-07-01 09:55:29.238 Doing ECDH key exchange with curve Curve25519 and hash SHA-256
    . 2023-07-01 09:55:29.418 Server also has ecdsa-sha2-nistp256/ssh-rsa host keys, but we don't know any of them
    . 2023-07-01 09:55:29.418 Host key fingerprint is:
    . 2023-07-01 09:55:29.418 ssh-ed25519 255 96:39:1e:51:f0:a8:b5:f0:20:38:34:0e:e7:18:2a:86 o1zXSkn8MA2UzlvZGxCRKH4ymwPu532QgCoXFtWJ0oA=
    . 2023-07-01 09:55:29.479 Host key matches cached key
    . 2023-07-01 09:55:29.479 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] outbound encryption
    . 2023-07-01 09:55:29.479 Initialised HMAC-SHA-256 outbound MAC algorithm
    . 2023-07-01 09:55:29.479 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] inbound encryption
    . 2023-07-01 09:55:29.479 Initialised HMAC-SHA-256 inbound MAC algorithm
    ! 2023-07-01 09:55:29.526 Using username "ijsRa2pS".
    . 2023-07-01 09:55:29.561 Server offered these authentication methods: publickey,gssapi-keyex,gssapi-with-mic,password
    . 2023-07-01 09:55:29.561 Using SSPI from SECUR32.DLL
    . 2023-07-01 09:55:29.561 Trying gssapi-with-mic...
    . 2023-07-01 09:55:29.561 Attempting GSSAPI authentication
    . 2023-07-01 09:55:29.573 GSSAPI authentication request refused
    . 2023-07-01 09:55:29.573 Server offered these authentication methods: publickey,gssapi-keyex,gssapi-with-mic,password
    . 2023-07-01 09:55:29.574 Prompt (password, "SSH password", <no instructions>, "パスワード(&P): ")
    . 2023-07-01 09:55:29.574 Using stored password.
    . 2023-07-01 09:55:29.603 Sent password
    . 2023-07-01 09:55:29.735 Access granted
    . 2023-07-01 09:55:29.735 Opening main session channel
    . 2023-07-01 09:55:29.783 Opened main channel
    . 2023-07-01 09:55:29.824 Started a shell/command
    . 2023-07-01 09:55:29.870 Doing startup conversation with host.
    > 2023-07-01 09:55:29.913 Type: SSH_FXP_INIT, Size: 5, Number: -1
    < 2023-07-01 09:55:29.958 Type: SSH_FXP_VERSION, Size: 150, Number: -1
    . 2023-07-01 09:55:29.958 SFTP version 3 negotiated.
    . 2023-07-01 09:55:29.958 Unknown server extension posix-rename@openssh.com="1"
    . 2023-07-01 09:55:29.958 Supports statvfs@openssh.com extension version "2"
    . 2023-07-01 09:55:29.958 Unknown server extension fstatvfs@openssh.com="2"
    . 2023-07-01 09:55:29.958 Supports hardlink@openssh.com extension version "1"
    . 2023-07-01 09:55:29.958 Unknown server extension fsync@openssh.com="1"
    . 2023-07-01 09:55:29.958 We believe the server has signed timestamps bug
    . 2023-07-01 09:55:29.958 We will use UTF-8 strings until server sends an invalid UTF-8 string as with SFTP version 3 and older UTF-8 strings are not mandatory
    . 2023-07-01 09:55:29.958 Limiting packet size to OpenSSH sftp-server limit of 262148 bytes
    . 2023-07-01 09:55:29.958 Changing directory to "/var".
    . 2023-07-01 09:55:29.958 Getting real path for '/var'
    > 2023-07-01 09:55:29.958 Type: SSH_FXP_REALPATH, Size: 13, Number: 37626384
    < 2023-07-01 09:55:30.025 Type: SSH_FXP_NAME, Size: 29, Number: 37626384
    . 2023-07-01 09:55:30.025 Real path is '/var'
    . 2023-07-01 09:55:30.025 Trying to open directory "/var".
    > 2023-07-01 09:55:30.025 Type: SSH_FXP_LSTAT, Size: 13, Number: 37626631
    < 2023-07-01 09:55:30.055 Type: SSH_FXP_ATTRS, Size: 37, Number: 37626631
    . 2023-07-01 09:55:30.055 Getting current directory name.
    . 2023-07-01 09:55:30.156 Directory content loaded from cache.
    . 2023-07-01 09:55:30.276 Cached directory not reloaded.
    . 2023-07-01 09:55:30.299 Listing directory "/var".
    > 2023-07-01 09:55:30.299 Type: SSH_FXP_OPENDIR, Size: 13, Number: 37626891
    < 2023-07-01 09:55:30.307 Type: SSH_FXP_HANDLE, Size: 13, Number: 37626891
    > 2023-07-01 09:55:30.307 Type: SSH_FXP_READDIR, Size: 13, Number: 37627148
    < 2023-07-01 09:55:30.320 Type: SSH_FXP_NAME, Size: 2825, Number: 37627148
    > 2023-07-01 09:55:30.321 Type: SSH_FXP_READDIR, Size: 13, Number: 37627404
    . 2023-07-01 09:55:30.321 Reading symlink "run".
    > 2023-07-01 09:55:30.321 Type: SSH_FXP_READLINK, Size: 17, Number: 37627667
    > 2023-07-01 09:55:30.321 Type: SSH_FXP_STAT, Size: 17, Number: 37627921
    < 2023-07-01 09:55:30.341 Type: SSH_FXP_STATUS, Size: 28, Number: 37627404
    . 2023-07-01 09:55:30.341 Storing reserved response
    < 2023-07-01 09:55:30.341 Type: SSH_FXP_NAME, Size: 33, Number: 37627667
    . 2023-07-01 09:55:30.341 Link resolved to "../run".
    < 2023-07-01 09:55:30.355 Type: SSH_FXP_ATTRS, Size: 37, Number: 37627921
    . 2023-07-01 09:55:30.355 Reading symlink "lock".
    > 2023-07-01 09:55:30.355 Type: SSH_FXP_READLINK, Size: 18, Number: 37628179
    > 2023-07-01 09:55:30.355 Type: SSH_FXP_STAT, Size: 18, Number: 37628433
    < 2023-07-01 09:55:30.360 Type: SSH_FXP_NAME, Size: 43, Number: 37628179
    . 2023-07-01 09:55:30.360 Link resolved to "../run/lock".
    < 2023-07-01 09:55:30.360 Type: SSH_FXP_ATTRS, Size: 37, Number: 37628433
    . 2023-07-01 09:55:30.376 Reading symlink "mail".
    > 2023-07-01 09:55:30.376 Type: SSH_FXP_READLINK, Size: 18, Number: 37628691
    > 2023-07-01 09:55:30.376 Type: SSH_FXP_STAT, Size: 18, Number: 37628945
    < 2023-07-01 09:55:30.393 Type: SSH_FXP_NAME, Size: 41, Number: 37628691
    . 2023-07-01 09:55:30.393 Link resolved to "spool/mail".
    < 2023-07-01 09:55:30.393 Type: SSH_FXP_ATTRS, Size: 37, Number: 37628945
    < 2023-07-01 09:55:30.423 Status code: 1
    > 2023-07-01 09:55:30.423 Type: SSH_FXP_CLOSE, Size: 13, Number: 37629188
    . 2023-07-01 09:55:30.423 ..;d;0;2020-04-12T02:31:11.000Z;3;"root" [0];"root" [0];r-xr-xr-x;0
    . 2023-07-01 09:55:30.424 lib;d;0;2020-04-12T02:33:48.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 run;l;0;2016-01-14T10:10:25.000Z;3;"root" [0];"root" [0];rwxrwxrwx;1
    . 2023-07-01 09:55:30.424 lock;l;0;2016-01-14T10:10:25.000Z;3;"root" [0];"root" [0];rwxrwxrwx;1
    . 2023-07-01 09:55:30.424 log;d;0;2023-06-30T18:08:01.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 adm;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 cache;d;0;2023-06-30T14:29:52.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 db;d;0;2020-04-12T02:31:25.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 empty;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 games;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 gopher;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 local;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 mail;l;0;2020-04-12T02:31:12.000Z;3;"root" [0];"root" [0];rwxrwxrwx;1
    . 2023-07-01 09:55:30.424 nis;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 opt;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 preserve;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 spool;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 tmp;d;0;2023-07-01T00:32:07.000Z;3;"root" [0];"root" [0];rwxrwxrwt;1
    . 2023-07-01 09:55:30.424 yp;d;0;2018-04-11T04:59:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 kerberos;d;0;2019-09-13T18:05:33.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 var;d;0;2016-01-14T10:12:33.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 crash;d;0;2019-08-08T11:41:21.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 account;d;0;2017-08-03T09:00:53.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 .updated;-;163;2020-04-12T02:31:12.000Z;3;"root" [0];"root" [0];rw-r--r--;2
    . 2023-07-01 09:55:30.424 www;d;0;2023-06-30T14:57:55.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.424 ftp;d;0;2020-05-28T12:07:56.000Z;3;"root" [0];"root" [0];rwxr-xr-x;0
    . 2023-07-01 09:55:30.479 Startup conversation with host finished.
    . 2023-07-01 09:56:22.435 Remote side unexpectedly closed network connection
    * 2023-07-01 09:56:22.436 (ESshFatal) サーバがネットワーク接続を閉じました
    
```
CC BY-SA 4.0
2023-06-30T23:40:55.957
95428
2023-07-01T01:53:56.210
2023-07-01T01:53:56.210
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58803
question
centos ssh
centos7サーバーでSSH接続をすると50秒で切断されてしまう