Also verify DH key length in server mode which must be 2048 or higher
```
openssl dhparam -inform PEM -in /config/auth/test_dh.pem -text -check
DH Parameters: (2048 bit)
prime:
00:e8:b6:88:c9:9a:bf:2d:69:50:08:24:eb:74:64:
0a:48:19:ed:5b:04:9b:fa:aa:f1:c8:88:cc:46:18:
bb:e0:e5:80:ce:e5:e5:2d:41:2b:46:b6:6a:ea:c5:
aa:d9:d4:17:fb:49:a4:92:5d:3d:89:e2:9e:5c:4d:
ad:8e:e3:19:0b:74:e5:53:c2:f4:7f:7e:07:27:0e:
97:14:27:8a:66:94:03:02:75:e5:c2:0b:81:56:37:
a4:eb:ee:24:0f:77:0f:7c:3c:d8:16:49:c0:0f:e3:
45:51:d5:d4:59:b4:66:8d:28:73:e1:63:8b:c6:16:
08:37:79:d7:ac:90:34:74:a8:39:23:87:2b:73:f5:
f4:90:9a:b9:26:35:ce:63:af:29:7b:2f:f7:c0:ae:
a3:9d:71:42:89:52:bd:13:28:2b:1e:12:e5:01:f8:
67:35:11:82:f3:e8:0c:22:5e:3f:ec:ac:c2:21:c2:
90:a2:ce:71:db:7a:04:a7:90:57:15:14:85:8b:89:
06:9f:f2:68:d9:cd:87:b7:63:de:dd:01:6a:9c:8c:
ee:ed:57:43:7e:25:ce:f9:26:fb:89:1b:5a:f0:ce:
21:22:ae:d1:87:82:ac:d7:ef:42:30:90:a9:47:8b:
09:16:53:9a:4f:5b:b3:e5:d0:02:e2:f7:2b:ef:d5:
1f:83
generator: 2 (0x2)
DH parameters appear to be ok.
-----BEGIN DH PARAMETERS-----
MIIBCAKCAQEA6LaIyZq/LWlQCCTrdGQKSBntWwSb+qrxyIjMRhi74OWAzuXlLUEr
RrZq6sWq2dQX+0mkkl09ieKeXE2tjuMZC3TlU8L0f34HJw6XFCeKZpQDAnXlwguB
Vjek6+4kD3cPfDzYFknAD+NFUdXUWbRmjShz4WOLxhYIN3nXrJA0dKg5I4crc/X0
kJq5JjXOY68pey/3wK6jnXFCiVK9EygrHhLlAfhnNRGC8+gMIl4/7KzCIcKQos5x
23oEp5BXFRSFi4kGn/Jo2c2Ht2Pe3QFqnIzu7VdDfiXO+Sb7iRta8M4hIq7Rh4Ks
1+9CMJCpR4sJFlOaT1uz5dAC4vcr79UfgwIBAg==
-----END DH PARAMETERS-----
```