Here is a patch that fixes it.
*** Makefile-old.PL 2011-11-21 21:35:39.445835372 +1030
--- Makefile.PL 2011-11-21 21:34:13.881835396 +1030
***************
*** 5,11 ****
WriteMakefile(
NAME => 'IPTables::ChainMgr',
VERSION_FROM => 'lib/IPTables/ChainMgr.pm', # finds $VERSION
! PREREQ_PM => {'Net::IPv4Addr' => 0.10}, # e.g., Module::Name => 1.1
($] >= 5.005 ? ## Add these new keywords supported since 5.005
(ABSTRACT_FROM => 'lib/IPTables/ChainMgr.pm', # retrieve abstract from module
AUTHOR => 'Michael Rash <mbr@cipherdyne.org>') : ()),
--- 5,11 ----
WriteMakefile(
NAME => 'IPTables::ChainMgr',
VERSION_FROM => 'lib/IPTables/ChainMgr.pm', # finds $VERSION
! PREREQ_PM => {'Net::IPv4Addr' => 0.10, 'IPTables::Parse' => 0.7}, # e.g., Module::Name => 1.1
($] >= 5.005 ? ## Add these new keywords supported since 5.005
(ABSTRACT_FROM => 'lib/IPTables/ChainMgr.pm', # retrieve abstract from module
AUTHOR => 'Michael Rash <mbr@cipherdyne.org>') : ()),