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- check that IO::Socket::SSL and Net::SSLeay are properly installed,
  and that the versions are recently new:
  perl -MIO::Socket::SSL -e 'print "$IO::Socket::SSL::VERSION\n"'
  perl -MNet::SSLeay -e 'print "$Net::SSLeay::VERSION\n"'

- run the tests in IO::Socket::SSL directory
  try running the tests with 'make test'. if some of the tests fail run
  the scripts one by one e.g.:
  perl -Ilib t/core.t

- try running the demos using the DEBUG option

- use the OpenSSL client and server for debugging the demo client and server.
  'openssl s_client' and 'openssl s_server' against tests/demos
  testing the demo server:
  openssl s_client -connect localhost:9000 \
	  -key certs/client-key.pem -cert certs/client-cert.pem -verify 1
  testing the demo client:
  openssl s_server -accept 9000 \
	  -key certs/server-key.pem -cert certs/server-cert.pem -verify 1
  also, try these commands without the verify argument.