Hi, With the H.323 conntrack helper enabled on a machine running Gnugk, it cannot establish multiple channels for conferencing and presentation with a Polycom MGC MCU. The device wants to use H.239 and the helper cannot decode/interpret the protocol: Sep 21 13:41:48 caladan kernel: nf_ct_h323: incomplete TPKT (fragmented?) Could you consider to add H.239 support to the H.323 helper? Best regards, Jozsef - E-mail : kadlec@xxxxxxxxxxxxxxxxx, kadlec@xxxxxxxxxxxx PGP key : http://www.kfki.hu/~kadlec/pgp_public_key.txt Address : KFKI Research Institute for Particle and Nuclear Physics H-1525 Budapest 114, POB. 49, Hungary -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html