If you get the message below launching enigma2, you can install by hand the service_identity module.

root@dm800se:~# easy_install service_identity

Code:
UserWarning: You do not have a working installation of 
the service_identity module: 'No module named service_identity'.
Please install it from <https://pypi.python.org/pypi/service_identity> 
and make sure all of its dependencies are satisfied.  
Without the service_identity module, Twisted can perform 
only rudimentary TLS client hostname verification.  
Many valid certificate/hostname mappings may be rejected.
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