Border 3.5
Nw 5.1

router : public ip : xxx
dmz : 192.168.1.253

Border : dmz : 192.168.1.2
private

VCN : 192.168.2.204


Router have PAt and forward packets arriving on public ip address on
port
5900 and 5800 to VNC ip address

Border have standard filters

If i remove filters, all is ok

i try to activate a standard Tcp Proxy but i don't know how
configuration
to set

Source address : public ?, Border DMZ ?, VNC ?
proxy, Dmz or private ?

is the router well configured ?

thanks