It looks to me like whatever you are scanning either is, or is behind, a proxy based firewall. PBF's will answer (on behalf of any host behind them) on all kinds of ports, but won't pass the traffic unless they have specific configuration to do so (ie an answered port looks blocked). PBF's also have a habit of giving their own info during OS Detection. My guess is a software based firewall running on Win2k (ISA is the first one that comes to mind, but there are several others...)
Jason C. North Computer Security Engineer CH2MHill Communications Group (The opinions expressed in this email are not necessarily those of CH2MHill Communication Group) > ------------------------------------------- At what point in the scan did you get blocked? It looks like the portscan worked, except that there are a whole lot of ports I'd not expect to see on a server like that. Things that stand out are the presence of VNC with Terminal Server AND Metaframe, for example. And Metaframe on 2000 Advanced Server seems like a terrible idea as well, from what I know of the way it handles foreground/background priority, and how it's optimized for specific types of server apps. Are you sure that there isn't some kind of reactive (firewall or IDS) configuration that's meant to throw you some red herrings that automatically block you when you connect to them? > -----Original Message----- > From: Ronen Gottlib [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] > Sent: Friday, June 27, 2003 4:54 AM > To: [EMAIL PROTECTED] > Subject: pen testing management and control system > > > Hi All, > > I am pen testing a windows 2000 advanced server, with some > kind of management and control software (e.g. Tivoli, > Netcool). The system has IIS 6.0 running with lockdown enabled. > > When I tried to run nessus, my ip was blocked for quite a > long time. same happened with nikto. > > Further more, although quite a few ports were found to be > open on the remote machine, the management and control > application is blocking the most of them while allowing > access only to the following: 21, 23(ms telnet server), > 25(Microsoft ESMTP MAIL Service, Version: 6.0.2600.1106), 80 > (Microsoft-IIS/6.0), 110 (Microsoft Windows POP3 Service > Version 2.0), 3389. > > > The system is also running Hummingbird Exceed. > > Does anyone have any idea? I've kind of reached a dead end. > Below is the results of an Nmap, if it helps. > > Thank you very much for your help- > > Ronen. > > > Port State Service > 21/tcp open ftp > 22/tcp open ssh > 23/tcp open telnet > 25/tcp open smtp > 53/tcp open domain > 80/tcp open http > 98/tcp open linuxconf > 110/tcp open pop-3 > 111/tcp open sunrpc > 135/tcp open loc-srv > 143/tcp open imap2 > 161/tcp open snmp > 443/tcp open https > 1080/tcp open socks > 1433/tcp open ms-sql-s > 1494/tcp open citrix-ica > 1720/tcp filtered H.323/Q.931 > 1723/tcp filtered pptp > 3389/tcp open ms-term-serv > 4000/tcp filtered remoteanything > 5135/tcp open unknown > 5631/tcp open pcanywheredata > 5632/tcp open pcanywherestat > 5900/tcp open vnc > 6112/tcp open dtspc > 6660/tcp filtered unknown > 6661/tcp filtered unknown > 6662/tcp filtered unknown > 6663/tcp filtered unknown > 6664/tcp filtered unknown > 6665/tcp filtered unknown > 6666/tcp filtered irc-serv > 6667/tcp filtered irc > 6668/tcp filtered irc > 6669/tcp filtered unknown > 8875/tcp filtered unknown > 28900/tcp filtered unknown > > > -------------------------------------------------------------- > ------------- > Latest attack techniques. > > You're a pen tester, but is google.com still your R&D team? > Now you can get > trustworthy commercial-grade exploits and the latest > techniques from a > world-class research group. > > Visit us at: www.coresecurity.com/promos/sf_ept1 > or call 617-399-6980 > -------------------------------------------------------------- > -------------- > > --------------------------------------------------------------------------- Latest attack techniques. You're a pen tester, but is google.com still your R&D team? Now you can get trustworthy commercial-grade exploits and the latest techniques from a world-class research group. Visit us at: www.coresecurity.com/promos/sf_ept1 or call 617-399-6980 ----------------------------------------------------------------------------
