Ciphers using CFB or OFB: These are considered uncommon and deprecated due to vulnerabilities when compared to newer cipher chaining modes such as CTR or GCM Key exchange algorithms using DH group 1 (...Ciphers using CFB or OFB: These are considered uncommon and deprecated due to vulnerabilities when compared to newer cipher chaining modes such as CTR or GCM Key exchange algorithms using DH group 1 (diffie-hellman-group1-sha1, diffie-hellman-group14-sha1,gss-group1-sha1-*): DH group 1 uses a 1024-bit key size, which is considered too short and vulnerable to Logjam-style attacks
