BM38 SP2 on NW6.5 SP2, clntrust loaded

I try to use VNC for windows to remote managing my server in internet. VNC
client must be connected with remote server host in the internet by BM
proxy. Usually I use http proxy on port 8080. How to set rules or other
settings to connect with specified host in internet?

VNC works well by BM NAT but my tests with connection by proxy are