Hello, as Jon already said, kamailio 4.1 dnssec module will need a few new libraries provided by dnsssec-tools[0] 2.0: - dns-validator_2.0-1_i386.deb - libval-threads_2.0-1_i386.deb - libval-threads-dev_2.0-1_i386.deb - libsres_2.0-1_i386.deb - libsres-dev_2.0-1_i386.deb So, have you any plans to upgrade the package and add those libraries? Cheers, Victor [0] http://www.kamailio.org/wiki/tutorials/dns/dnssec