netscreen 25 routing question

May 11, 2005 5 Replies

Well this config is FUBAR if you want it to be a router. You have eth1 setup in transparent mode and in the V1-Trust zone, and then you have eth3 in Untrust with a Private address.

You've got this config freakin' twisted to be a router. And of course you didn't show each individual interface. I'm not even gonna touch this one. If you want some serious help on the 25, pay somebody that knows what they are doing. And of course I'd be glad to accept a check and get a config written for you, but not like this.

Word.

MQ

Inherited a Netscreen 25 , and from what appears to be the factory default configuration,



I have configured eth3 as my untrust network , and can ping sites from the router on the internet from eth3:



....ns25-> ping 209.68.22.220 from eth3 ....Sending 5, 100-byte ICMP Echos to 209.68.22.220, timeout is 1 seconds ....!!!!! ....Success Rate is 100 percent (5/5), round-trip time min/avg/max=44/44/44 ms



However, despite adding the policy below to an otherwise empty policy list, :



set policy top from "Trust" to "Untrust" "Any" "Any" "ANY" nat src dip-id 2 Permit log



I am unable to ping from the VLAN interface to the outside world.


Interface list below:



Name IP/Netmask Zone Type Link Configure ethernet1 0.0.0.0/0 V1-Trust Layer2 up Edit ethernet2 0.0.0.0/0 V1-DMZ Layer2 down Edit ethernet3 192.168.2.8/24 Untrust Layer3 up Edit ethernet4 0.0.0.0/0 Null Unused down Edit vlan1 192.168.1.1/24 VLAN Layer3 up Edit


I desire to set this up as a standard router / firewall, with eth1 being my "trusted" network, and eth3 being the Internet, but have been unable to get the router to ping between interfaces, much less route traffic between the networks...


As MQ said, your current config is a mess that won't do anything useful.

I recommend RTFM - there are worked examples close to what you are trying to achieve - and retain a professional consultant if still unsure.

Sunny

Munpe -

Never messed w/ netscreens before, and assumed it was in a "normal" factory default config.... Thanks for the direction.

Initial impressions of obtuseness soon give way to an appreciation of elegant implementation. Explore and enjoy :-)

Sunny

Well, from FUBAR to functional in two quick commands.

1) Define eth1 as belonging to trust interface , rather than the previously configured v1-trust

2) define desired ip parameters for above interface.

I've configured routers and firewalls from a lot of different vendors, I find the netscreen's implementation more obtuse than most, though it seems remarkably full-featured

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