421 Service not available.\r\n

OpenSSH7.4

SSH-2.0-OpenSSH_7.4
Key type: ssh-rsa
Key: AAAAB3NzaC1yc2EAAAADAQABAAABAQCx2ZgackmMqffwSWp2IzMddMAutsFvcJFtyLrXPUOYctbf
7Cp8zUTG1btw4paw5x50hV+uwx3Fe4lczozhswxaJidlz4yK0G93Rb0Y7MGaSeRojK57QU5l1l6o
MxIHO9LxA9igugopkl4erFAEc1QND1JlqoWIJ1CUozCcB5HSJQUBslN2SsKz/X4cT+HjT3e6SDAi
6iEExhcwg0/IEbVlvyhnU1gGpWSRJRufxd8WH4jjdAj7rVkRz5ziN/kQ6EfHmjaeKjL6yZsmkSwj
6s1qI30JA4k2uNks1jv4LP0JwvUTKAI0NVDMDbkkQyibUmXgPQuClBsynoaBYSXM66Mz
Fingerprint: 0b:c3:19:8c:4d:a5:79:42:06:e1:67:d6:ef:18:2b:17

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

Server Host Key Algorithms:
	ssh-rsa
	rsa-sha2-512
	rsa-sha2-256
	ecdsa-sha2-nistp256
	ssh-ed25519

Encryption Algorithms:
	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

MAC Algorithms:
	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

Compression Algorithms:
	none
	zlib@openssh.com

nginx

HTTP/1.1 200 OK
Server: nginx
Date: Sat, 28 Dec 2024 07:07:57 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 612
Last-Modified: Fri, 09 Jul 2021 03:19:08 GMT
Connection: keep-alive
ETag: "60e7c02c-264"
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
Accept-Ranges: bytes

Portmap
Program	Version	Protocol	Port
portmapper	4	tcp	111
portmapper	3	tcp	111
portmapper	2	tcp	111
portmapper	4	udp	111
portmapper	3	udp	111
portmapper	2	udp	111

Portmap
Program	Version	Protocol	Port
portmapper	4	tcp	111
portmapper	3	tcp	111
portmapper	2	tcp	111
portmapper	4	udp	111
portmapper	3	udp	111
portmapper	2	udp	111

nginx

HTTP/1.1 200 OK
Server: nginx
Date: Mon, 30 Dec 2024 22:37:43 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 612
Last-Modified: Fri, 09 Jul 2021 03:19:08 GMT
Connection: keep-alive
ETag: "60e7c02c-264"
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
Accept-Ranges: bytes

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 5667 (0x1623)
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C=--, ST=SomeState, L=SomeCity, O=SomeOrganization, OU=SomeOrganizationalUnit, CN=163-44-173-141/emailAddress=root@163-44-173-141
        Validity
            Not Before: Aug 28 11:16:28 2018 GMT
            Not After : Aug 28 11:16:28 2019 GMT
        Subject: C=--, ST=SomeState, L=SomeCity, O=SomeOrganization, OU=SomeOrganizationalUnit, CN=163-44-173-141/emailAddress=root@163-44-173-141
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:e4:37:d8:72:2f:c8:b9:22:a8:08:84:fd:7b:23:
                    38:72:a2:4d:77:12:23:70:3f:52:ec:af:62:50:bb:
                    5f:00:d3:c5:8c:f7:0e:ec:23:7f:dc:91:36:60:52:
                    74:b4:9f:d5:06:ba:36:65:ba:14:4c:3a:2b:51:b3:
                    44:9d:39:0c:a8:3c:04:1f:37:e8:13:3e:fb:f8:b9:
                    59:ad:09:60:8f:11:0b:63:cb:6f:7e:4b:9b:37:e6:
                    b1:21:a1:7d:c2:c9:4c:55:e7:cf:b7:90:43:9f:d1:
                    42:c0:1e:85:e4:e1:7b:b2:c2:01:4c:c4:62:e3:83:
                    fa:df:f1:28:59:9d:05:b0:cd:7d:02:a8:4c:b0:c0:
                    e4:df:2f:8a:3b:eb:6e:a9:1c:60:8c:18:bb:d4:f9:
                    1a:78:2f:5f:2a:fa:c2:10:03:18:39:82:85:f2:3f:
                    22:e7:ea:ed:53:9d:ba:82:68:70:02:30:2d:1d:a8:
                    ba:71:37:f0:c8:dc:7b:fb:bb:f9:54:f5:e0:76:46:
                    95:40:16:2b:23:45:a8:72:13:fe:ec:fa:5a:72:66:
                    4f:cd:41:26:a3:fe:27:d7:32:62:3b:79:77:b3:b4:
                    4b:ac:95:c0:cd:2a:05:50:46:66:50:0d:ee:59:60:
                    2a:4d:9f:2b:93:a4:ae:2b:52:cb:aa:ad:07:ef:a2:
                    d3:9f
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints: 
                CA:FALSE
            X509v3 Key Usage: 
                Digital Signature, Non Repudiation, Key Encipherment
    Signature Algorithm: sha256WithRSAEncryption
    Signature Value:
        71:cd:3f:cb:02:0e:8a:cb:39:5e:cf:07:2e:32:32:cf:71:ba:
        04:16:7e:ac:3b:fa:ca:0e:72:d9:20:c2:7f:0f:de:b9:8c:3b:
        eb:e6:b0:79:e9:fa:15:85:22:f6:c4:a5:d5:a2:ed:14:24:f9:
        72:0e:3d:44:75:99:6c:c2:a5:08:e1:f4:87:9e:d4:19:69:94:
        5d:5c:87:d4:0d:ef:6a:bf:00:65:4c:ab:dc:b1:32:24:a2:45:
        d5:71:91:c3:36:db:56:2e:b0:a9:99:ca:73:63:ba:d0:f1:bc:
        06:6c:03:da:20:f4:e1:cb:fb:e1:3b:a0:e7:47:4d:b9:f0:a7:
        49:61:1c:af:b1:25:9b:f3:f1:7f:67:ba:e3:8d:80:19:a9:30:
        e7:b5:37:78:b2:19:90:e8:ae:c9:a4:06:0b:5a:b3:43:33:25:
        b7:ea:c3:75:41:23:1a:09:12:27:5e:90:66:10:44:cf:a7:4b:
        51:40:13:06:48:00:aa:eb:be:ab:b0:6d:cd:7c:ec:96:89:96:
        66:be:4e:ed:3d:50:a2:7a:8d:3a:18:7b:85:d7:a3:03:5d:a1:
        5a:f3:73:e4:ac:f1:47:0d:75:c4:46:d9:4c:43:a7:84:ae:99:
        3d:9c:0a:8d:2b:a7:dc:86:f8:9b:bf:95:20:51:f1:fc:42:5a:
        9f:2c:42:3f

MariaDB

MariaDB:
  Error Message: Host '224.176.208.194' is not allowed to connect to this MariaDB server
  Error Code: 1130