Rebex SSH Test result for 87.98.242.21:22

General information

Server Identification: SSH-2.0-OpenSSH_8.9p1 Ubuntu-3ubuntu0.13
IP Address: 87.98.242.21
Generated at: 2025-09-14 11:23:33 UTC (19 hours ago) - clear cache
The server does not seem to be vulnerable to the Terrapin attack.

Key Exchange Algorithms

kex-strict-s-v00@openssh.com
Unknown
sntrup761x25519-sha512@openssh.com
Unknown
diffie-hellman-group14-sha256
Diffie-Hellman with 2048-bit Oakley Group 14 with SHA-256 hash
Oakley Group 14 should be secure for now. 		Secure
diffie-hellman-group16-sha512
Diffie-Hellman with 4096-bit MODP Group 16 with SHA-512 hash
Secure
diffie-hellman-group18-sha512
Diffie-Hellman with 8192-bit MODP Group 18 with SHA-512 hash
Secure
diffie-hellman-group-exchange-sha256
Diffie-Hellman with MODP Group Exchange with SHA-256 hash
Secure
curve25519-sha256
Elliptic Curve Diffie-Hellman on Curve25519 with SHA-256 hash
Secure
curve25519-sha256@libssh.org
Elliptic Curve Diffie-Hellman on Curve25519 with SHA-256 hash
Secure
ecdh-sha2-nistp256
Elliptic Curve Diffie-Hellman on NIST P-256 curve with SHA-256 hash
Possible NSA backdoor. 		Secure
ecdh-sha2-nistp384
Elliptic Curve Diffie-Hellman on NIST P-384 curve with SHA-384 hash
Possible NSA backdoor. 		Secure
ecdh-sha2-nistp521
Elliptic Curve Diffie-Hellman on NIST P-521 curve with SHA-512 hash
Possible NSA backdoor. 		Secure

Server Host Key Algorithms

ssh-ed25519
Ed25519, an Edwards-curve Digital Signature Algorithm (EdDSA)
Secure
ecdsa-sha2-nistp256
Elliptic Curve Digital Signature Algorithm (ECDSA) on NIST P-256 curve with SHA-256 hash
Possible NSA backdoor. 		Secure
rsa-sha2-256
RSA with SHA-256 hash
Secure
rsa-sha2-512
RSA with SHA-512 hash
Secure

Encryption Algorithms

chacha20-poly1305@openssh.com
256-bit ChaCha20 with Poly1305 authenticator by OpenSSH
Secure
aes256-gcm@openssh.com
AES with 256-bit key in GCM mode by OpenSSH
Secure
aes128-gcm@openssh.com
AES with 128-bit key in GCM mode by OpenSSH
Secure
aes256-ctr
AES with 256-bit key in CTR mode
Secure
aes192-ctr
AES with 192-bit key in CTR mode
Secure
aes128-ctr
AES with 128-bit key in CTR mode
Secure

MAC Algorithms

umac-128-etm@openssh.com
128-bit Universal Hashing MAC (Encrypt-then-MAC) by OpenSSH
Secure
hmac-sha2-256-etm@openssh.com
Hash-based MAC using SHA-256 (Encrypt-then-MAC) by OpenSSH
Secure
hmac-sha2-512-etm@openssh.com
Hash-based MAC using SHA-512 (Encrypt-then-MAC) by OpenSSH
Secure
umac-128@openssh.com
128-bit Universal Hashing MAC by OpenSSH
Secure
hmac-sha2-256
Hash-based MAC using SHA-256
Secure
hmac-sha2-512
Hash-based MAC using SHA-512
Secure
umac-64-etm@openssh.com
64-bit UMAC (Universal Hashing MAC) (Encrypt-then-MAC) by OpenSSH
64-bit UMAC is no longer considered secure enough. Recommended tag size should be at least 128 bits. 		Weak
hmac-sha1-etm@openssh.com
Hash-based MAC using SHA-1 (Encrypt-then-MAC) by OpenSSH
SHA-1 is becoming deprecated - consider replacing with SHA-256 or SHA-512. 		Weak
umac-64@openssh.com
64-bit UMAC (Universal Hashing MAC) by OpenSSH
64-bit UMAC is no longer considered secure enough. 		Weak
hmac-sha1
Hash-based MAC using SHA-1
SHA-1 is becoming deprecated - consider replacing with SHA-256 or SHA-512. 		Weak

Compression Algorithms

none
No compression
Unknown
zlib@openssh.com
zlib compression by OpenSSH
Unknown

Server Public Keys

rsa-sha2-512

Key size: 3072bit
MD5 Fingerprint: 15:89:3a:92:a5:08:3c:42:93:12:0c:78:4b:97:25:30
SHA-256 Fingerprint: zzQs5aalKEPy+wPExjzqlnzQT2N/onTaeL/KXcD+RhM
Public key: 
---- BEGIN SSH2 PUBLIC KEY ----
Comment: "Saved by Rebex SSH"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---- END SSH2 PUBLIC KEY ----

rsa-sha2-256

Key size: 3072bit
MD5 Fingerprint: 15:89:3a:92:a5:08:3c:42:93:12:0c:78:4b:97:25:30
SHA-256 Fingerprint: zzQs5aalKEPy+wPExjzqlnzQT2N/onTaeL/KXcD+RhM
Public key: 
---- BEGIN SSH2 PUBLIC KEY ----
Comment: "Saved by Rebex SSH"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---- END SSH2 PUBLIC KEY ----

ecdsa-sha2-nistp256

Key size: 256bit
MD5 Fingerprint: da:63:ee:2c:d0:cc:9d:af:6c:70:c3:4e:bb:4f:ee:ff
SHA-256 Fingerprint: I52qhKtoCyIirgQ0EVKplePtKfwcOAoWkRLRtLa9UBU
Public key: 
---- BEGIN SSH2 PUBLIC KEY ----
Comment: "Saved by Rebex SSH"
AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBCNXsvItQs2X
pzlQ/MidkKFd2kEGPewm80bKoVxk5lBjWN5JBmDMOUiu2oKGdU5GyFFdtqGQICVg
eZX1fp1LvlA=
---- END SSH2 PUBLIC KEY ----

ssh-ed25519

Key size: 256bit
MD5 Fingerprint: 7a:41:6d:c8:91:e1:77:15:e8:83:71:1a:e3:f0:8e:a4
SHA-256 Fingerprint: 2CbXH40T4FsUfmKMZqlbHJeahgfKdDepdHkEPeP3mw4
Public key: 
---- BEGIN SSH2 PUBLIC KEY ----
Comment: "Saved by Rebex SSH"
AAAAC3NzaC1lZDI1NTE5AAAAIKTk/NOe4iqjcVd1VHxQN3psF4tkSEStYNBNVWv5
a7fv
---- END SSH2 PUBLIC KEY ----