IPSO Configuration Sets

IPSO configuration sets allow you to change (or save) your systems complete current configuration. Allowing you to choose the required configuration (set) of your firewall with a few simple commands. This is useful for importing in configurations from other devices rather then setting up a box from scratch. Configuration Set directory The active configuration file … Read more

Enabling RIP on a Netscreen

Routing Information Protocol (RIP) is a distance vector protocol used as an Interior Gateway Protocol (IGP) in moderate-sized autonomous systems (AS). Enabling RIP on a VR and an Interface set vrouter trust-vr router-id 10 set vrouter trust-vr protocol rip set vrouter trust-vr protocol rip enableset interface trust protocol rip enable Advertise the default route set … Read more

PIX / ASA – Display Encrypted Pre-Shared Keys.

To allow you to view your preshared keys on your PIX ASA use the command `more system:running-config`.  You can also view the preshared password with some versions of ASDM. Below shows the example of the command. pixfirewall# show run ! tunnel-group mytunnel type ipsec-rapre-shared-key * telnet timeout 5 Your preshared key ….. pixfirewall# more system:running-config! … Read more

Netscreen – AC-VPN

AC-VPN Auto-connect VPN works with a hub and spoke setup. Once static VPNs have been configured between all the spokes and the hubs, AC-VPN and NHRP (Next Hop Routing Protocol) is configured on each spoke and the hub.When traffic is initiated between 2 spokes the traffic is passed via the hub while a dynamic tunnel … Read more

Netscreen – VPN Topologies

Back to Back VPNs Back to Back VPNs allow you to create a tunnel for each spoke to the hub. The hub will then have a policy to allow traffic from one tunnel to the next. You can either place each tunnel within its own zone and create a policy between each of the zones. … Read more

Netscreen `set arp always-on-dest` command

By default, Netscreen (ScreenOS versions 6.0.0 or below) will cache the source MAC address from the initial packet for a new session. It will then use this MAC address for the return traffic. This can cause problems with external routers running VRRP where traffic is sent using a Virtual IP but a physical MAC address … Read more

Netscreen – Overview of basic Traffic Shaping

There are 3 main types of traffic shaping on the Netscreen firewalls. Interface Based traffic shaping. Bandwidth allocated shaping in policies. Priority based traffic shapping in policies. Policy Based Policing Bandwidth: Traffic beyond this threshold is dropped at the ingress side of the security device.Guaranteed Bandwidth: Traffic below this threshold will be passed with highest … Read more

Netscreen – IGMP / PIM-SM

Internet Group Management Protocol (IGMP) is a communication protocol that multicasts messages and information among all member devices in an IP multicast group. Traffic is sent to a single MAC address but is forwarded out (via the local multicast router) to multiple hosts via multicast. It can be effectively used for gaming and showing online … Read more