I imported my configfile from the 7.405.
It hast an packetfilter allowance for an incoming VNC connection.
There is also an DNAT rule.
Masquerading is also enabled.
The connection seems to be dropped by the IPS
IPS: Top blocked attacks
Details
Total attacks blocked: 19
Rule ID Rule Description Rule group Packets % of total
1 560 POLICY VNC server response OS / Other 19 100.00
What needs to be done to connect to the internal VNC server?
greetz chaser