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@@ -55,6 +55,8 @@ Additional information for TPROXY
---------------------------------
TPROXY is the only method that supports full support of IPv6 and UDP.
+.. _PyXAPI: http://www.pps.univ-paris-diderot.fr/~ylg/PyXAPI/
+
Full UDP or DNS support with the TPROXY method requires the ``recvmsg()``
syscall. This is not available in Python 2, however is in Python 3.5 and
later. Under Python 2 you might find it sufficient installing PyXAPI_ to get