What cryptographic network services, protocols, ciphers & hashes are supported?

This information is currently based on these versions.

Console Server version 4.13.3 (IM7200, ACM7000, CM7100)

NGCS version 23.03.1 (OM2200)

Lighthouse version 22.11.2

Commands are provided to print current details from the Opengear CLI.

Cryptographic applications & libraries 

For the purposes of this article, we’re considering programs that provide network services that securely authenticate and encrypt connections to Opengear and/or its managed devices.

Libraries

OpenSSL

1.0.1u-fips (CS) 1.1.1s (Lighthouse) 3.0.7 (NGCS)

openssl version

Applications using OpenSSL 

OpenSSH	7.7p1 (CS) 8.2p1 (Lighthouse) 8.9p1 (NGCS)	ssh -V
OpenVPN	2.4.6 (CS) 2.5.6 (Lighthouse) 2.5.6 (NGCS)	openvpn --version
Cherokee Web Server	1.2.104	cherokee --version

Applications not using OpenSSL

Openswan IPsec	U2.6.37 /K	ipsec --version
Poptop PPTP Server	v1.3.4	pptpd -v

Cherokee Web Server 

The Cherokee web server implements The Mozilla Foundation’s recommended ciphersuite for intermediate compatibility.

This disables weak encryption elements including null ciphers, SSLv3 and RC4, while maintaining moderate backward compatibility:

https://wiki.mozilla.org/Security/Server_Side_TLS#Intermediate_compatibility_.28default.29

The default, self-signed SSL certificate length is 1024 bits.

To view Cherokee’s cipher string, run:

grep ssl_ciphers /etc/config/cherokee/conf.d/https.conf

Although not generally recommended, you may override this cipher string with:

config -s config.https.customciphers='custom_cipher_string' -r ssl

Clear your custom cipher string and return to defaults with:

config -d config.https.customciphers -r ssl

OpenSSH Server (7.7p1 and later) 

The SSH server supports SSHv2 only. 

For a full list of enabled ciphers, key exchanges algorithms, and hashes (OpenSSH v7.7p1 and later only), run:

sshd -T | grep "\(ciphers\|macs\|kexalgorithms\)"

These are summarized in the following table:

Protocol	SSHv2
Key Exchange	diffie-hellman-group-exchange-sha256 diffie-hellman-group-exchange-sha1 diffie-hellman-group14-sha1 diffie-hellman-group1-sha1
Authentication	RSA, ECDSA, ED25519 Public Key Password
Encryption	aes128-ctr aes192-ctr aes256-ctr arcfour256 arcfour128 aes128-cbc 3des-cbc blowfish-cbc cast128-cbc aes192-cbc aes256-cbc arcfour [e-mail]
Hash	hmac-md5 hmac-sha1 hmac-ripemd160 [e-mail] hmac-sha1-96 hmac-md5-96

The automatically generated RSA host key is 4096 bits.  The automatically generated ECDSA and ED25519 host keys are 256 bits.  These are generated on first boot after a factory reset.

OpenVPN

By default, OpenVPN tunnels are configured to disallow export ciphers, known weak ciphers (e.g. DES), and RSA key exchange (note: not RSA authentication), using the following cipher string:

DEFAULT:!EXP:!LOW:!PSK:!SRP:!kRSA

 Otherwise the full range support by OpenSSL is available (see below). 

Individual tunnels may set their own cipher string by selecting Custom Configuration and specifying the tls-cipher parameter.

OpenSSL 

Although many of these may be disabled by the individual applications above, the underlying OpenSSL supports a variety of protocol versions, ciphers and hashes.  For a full list of ciphers, run:

openssl ciphers -v

These are summarized in the following table: 

Protocol	SSLv3 TLSv1.2 TLS1.3
Key Exchange	DH ECDH ECDH/ECDSA ECDH/RSA PSK RSA SRP
Authentication	DSS ECDH ECDSA PSK RSA SRP
Encryption	3DES(168) AES(128) AES(256) AESGCM(128) AESGCM(256) Camellia(128) Camellia(256) DES(56) RC4(128) SEED(128)
Hash	AEAD MD5 SHA1 SHA256 SHA384

For more details on OpenSSL cipher support visit:

https://www.openssl.org/docs/man1.1.1/man1/ciphers.html

https://www.openssl.org/docs/man3.0/man1/ciphers.html

Openswan IPsec

For a full list of available ciphers et al., configure an IPsec tunnel then run:

ipsec auto --status

These are summarized in the following table:

Protocol	IKE ESP NAT-T
Authentication	RSA digital signature Shared secret (PSK) x.509 certificates
Encryption	DES 3DES AES128 AES192 AES256
Hash	MD5 SHA1
Perfect Forward Secrecy	MODP768 MODP1024 MODP1536 MODP2048 MODP3072 MODP4096 MODP6144 MODP8192 DH22 DH23 DH24

Poptop PPTP Server

Note that PPTP is not recommended for high-security applications.

Authentication	PAP CHAP MSCHAPv2
Encryption	MPPE/RC4 40bit MPPE/RC4 128bit