There's a program that uses the following OpenSSL function...
DH_generate_parameters(256, 5, NULL, NULL)
...to create DH parameters which are later used for hundreds of key exchanges (and the one-time keys used to encrypt login details sent over Internet).
The manual page says 256 is
prime_len in bits. How secure is this value? (I have a bad feeling.)
Also, if I'm reading http://www.keylength.com/, does this correspond to "discrete logarithm key" or "discrete logarithm group" or am I looking in the entirely wrong place?