[_mhp_]

Another alternative is minion[0]. The format is TCP on the wire which avoids the NAT problems that SCTP has, but it is able to deliver some really interesting features, including multiple message streams like SCTP.

[0] https://datatracker.ietf.org/doc/search/?name=minion&actived...

[tankenmate]

Or if SCTP firewall issues are the only thing holding you back you can use RFC 6951; SCTP over UDP.

http://tools.ietf.org/html/rfc6951