Firewall Wizards mailing list archives
Re: scanning...
From: Hile.William () epamail epa gov
Date: Wed, 02 Nov 2005 14:41:53 -0500
NMAP would be an excellent tool... you can put in the IP range or subnet with that... As far as traversing firewalls... it will only report what ports are allowed through the firewall for each host... so you are firewall ruleset dependant so it may not give you complete results for a host on the other side of a firewall... It will report as an example port 80 is allowed through and httpd is running on the host in question so it will report that service but smptd is also running on the server however its not allowed through the firewall from you so you will not know its listening because you cant see the port... so you are basically bound to your firewall rule set there could be servers beyond your firewall that are up and functional but that you do not have access to any of the services running on them so from your perspective they will essentially be down. William Brian Loe <knobdy () gmail com> 11/02/2005 02:31 PM To William Hile/RTP/USEPA/US@EPA cc firewall-wizards () honor icsalabs com, firewall-wizards-admin () honor icsalabs com Subject Re: [fw-wiz] scanning... I was going to mention nmap - which I wouldn't mind using in this effort at all. The question is, will it traverse the firewalls? Isn't there a "true" management network operation you can use on Cisco boxes that work as a "private VLAN" and be passed via most any device - even a PIX (and they think they're a part of VLAN 1 or whatever, right?)? Words in "s are there for a lack of better ones, or my lack of understanding. On 11/2/05, Hile.William () epamail epa gov < Hile.William () epamail epa gov> wrote: Brian, I think I would approach this from a ummm hacker mentatility... I know a little info and I need to gain all the information I can.. I think I would probably start with something simple like angry IP scanner and input the subnet (of course make sure you have permission to scan the network) and go from there. There are tons of free tools out there that can ip walk and OS guess but just make sure you have full permission to make you scans before doing so. humm seems that whatsup gold (there's a free trial out there) will do network discovery and even seems that it will do so via whatever port you choose... Its been awhile since i used it... and I know it will monitor your server/workstations via whatever port but I cant remember how it does net discovery... And if you have free reign of the network use this as a learning exp and try out several ways to do what you are trying to accomplish... and see which one is better and or produces the most output... I wish you luck Let me know how things turn out..... William Brian Loe <knobdy () gmail com> Sent by: firewall-wizards-admin () honor icsalabs com 11/02/2005 09:22 AM To firewall-wizards () honor icsalabs com cc Subject [fw-wiz] scanning... Let me ask all of you a fairly generic question that should garner lots of different ideas. Let us say that you have gone to work for a new company as a network admin. It is a fairly complex network with multiple routers, switches and firewalls (a firewall for every router, let's say). The current network team has no formal training and have done all of their learning on the job, following a contracting company who was paid to initially setup the network. Okay, so how would you go about mapping out this network? You don't have the understanding of devices by name yet, and each device is likely to have 20 interfaces on it, with 20 IPs for 20 networks! You live on a "management network", but it's only "management" because it's a subnet which has been given telnet access to all of the devices on the network - in other words, scanning with your usual tool (LAN MapShot from Fluke - in my case, because it CAN start a pretty good network diagram directly in Visio) from your "management" network won't show you anything than it will from any other subnet. Follow what I mean? Ideas? Pretend the network is yours and you're free to change anything you want - where would you start? _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- scanning... Brian Loe (Nov 02)
- RE: scanning... Paul Melson (Nov 02)
- Re: scanning... Brian Loe (Nov 02)
- RE: scanning... Gwendolynn ferch Elydyr (Nov 04)
- Re: scanning... Paul D. Robertson (Nov 06)
- Re: scanning... Jim MacLeod (Nov 06)
- Re: scanning... Oddbjørn Steffensen (Nov 10)
- Re: scanning... Carric Dooley (Nov 16)
- <Possible follow-ups>
- Re: scanning... Hile . William (Nov 02)
- Re: scanning... Julian M D (Nov 04)
- Re: scanning... Brian Loe (Nov 04)
- Re: scanning... Julian M D (Nov 04)
- Re: scanning... Julian M D (Nov 04)
- RE: scanning... Paul Melson (Nov 02)