Forum Discussion
themyth_317517
Nimbostratus
NimbostratusPort 1720 open on F5 public virtual server
Hi guy,
My virtual server pulib to Internet via F5 and just open port http/80, https/443, but when i try to telnet port 1720 to Public IP of virtual server, it connect
[telnet IP 1720], its working, ...
MvdG
Cirrus
CirrusHi,
Is there a Check Point firewall between the internet and the F5, and is port 1720 (H323) used in the rule base as a custom service?
If have seen this kind of behavior with on of our customers. A telnet on port 1720 is accepted by the Check Point because Check Point wants to inspect the H323 traffic. Even if it is a custom service on the same port-number.
If there is a NAT rule, it seems like the F5 is accepting the connection, but in fact it is the Check Point.
Hope this helps.
Martijn.
