I am building a webserver ( http://blog.linformatronics.nl/ ), which functions just fine on both IPv4 and IPv6 and when using a non-SSL connection. However when I connect to it through https, IPv6 works as expected, but an IPv4 connection throws a client side error. Server side logs are empty for the IPv4/https connection. Summarized in a table:

     | http  | https
-----+-------+-------------------------------------------------------
IPv4 | works | OpenSSL error, failed. No server side logging.
-----+-------+-------------------------------------------------------
IPv6 | works | self signed certificate warning, but works as expected

Apparently the SSL tunnel isn't even set up, which accounts for the Apache logs being empty. But why does it work fine for IPv6 and fail for IPv4? My question is why is this OpenSSL error being thrown and how can I solve it?

Below is some extra information about the setup.

IPv6 https

Command used to reproduce IPv6/https behaviour:

$ wget --no-check-certificate -O /dev/null -6 https://blog.linformatronics.nl
--2012-11-03 15:46:48--  https://blog.linformatronics.nl/
Resolving blog.linformatronics.nl (blog.linformatronics.nl)... 2001:980:1b7f:1:a00:27ff:fea6:a2e7
Connecting to blog.linformatronics.nl (blog.linformatronics.nl)|2001:980:1b7f:1:a00:27ff:fea6:a2e7|:443... connected.
WARNING: cannot verify blog.linformatronics.nl's certificate, issued by `/CN=localhost':
  Self-signed certificate encountered.
    WARNING: certificate common name `localhost' doesn't match requested host name `blog.linformatronics.nl'.
HTTP request sent, awaiting response... 200 OK
Length: 4556 (4.4K) [text/html]
Saving to: `/dev/null'

100%[=======================================================================>] 4,556       --.-K/s   in 0s      

2012-11-03 15:46:49 (62.5 MB/s) - `/dev/null' saved [4556/4556]

IPv4 https

Command used to reproduce IPv6/https behaviour:

$ wget --no-check-certificate -O /dev/null -4 https://blog.linformatronics.nl
--2012-11-03 15:47:28--  https://blog.linformatronics.nl/
Resolving blog.linformatronics.nl (blog.linformatronics.nl)... 82.95.251.247
Connecting to blog.linformatronics.nl (blog.linformatronics.nl)|82.95.251.247|:443... connected.
OpenSSL: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol
Unable to establish SSL connection.

Notes

• I am on Ubuntu Server 12.04.1 LTS