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Port Scanning

  • 04-04-2004 7:12pm
    #1
    Couch Potato
    Registered Users, Registered Users 2 Posts: 481 ✭✭


    My firewall software has just reported a Port Scan from an IP Address with a 'minor' severity type.

    Does this mean that someone is actually trying to attack my machine or just a random scan .. I can back trace the IP address to '.nl' url...


Comments

  • #2
    Couch Potato
    Registered Users, Registered Users 2 Posts: 481 ✭✭Couch Potato


    Traced it back now to a Dutch ISP ...

    Maybe one of their users ????


  • #3
    cregser
    Registered Users, Registered Users 2 Posts: 999 ✭✭✭cregser


    I've getting a load of port scans recently. It started with someone from Oregan in the US. Since then its been from Alaska, Germany, Ireland...all over. It didn't happen as frequently before January.

    Ad-aware doesn't detect any spyware.


  • #4
    zenith
    Registered Users, Registered Users 2 Posts: 785 ✭✭✭zenith


    Yeah, may be a port scan, may be innocent: depends on the reliability of the firewall you're using.

    Anyway, that's what the firewall's for: to keep the bad guys out. It's just that some of them report every piece of activity they get, whether it represents a threat or not.

    I don't really suppose it's worth following up on ...


  • #5
    Couch Potato
    Registered Users, Registered Users 2 Posts: 481 ✭✭Couch Potato


    Originally posted by zenith
    Yeah, may be a port scan, may be innocent: depends on the reliability of the firewall you're using.

    Anyway, that's what the firewall's for: to keep the bad guys out. It's just that some of them report every piece of activity they get, whether it represents a threat or not.

    I don't really suppose it's worth following up on ...

    Thanks guys ... I am using Sygate Personal Firewall (as it was free !!)

    What are your opinions on the best one to use .. I wouldn't spending a few yoyos for that 'extra' piece of mind.


  • #6
    Pacifico
    Closed Accounts Posts: 5,115 ✭✭✭Pacifico


    Originally posted by Couch Potato
    Thanks guys ... I am using Sygate Personal Firewall (as it was free !!)

    What are your opinions on the best one to use .. I wouldn't spending a few yoyos for that 'extra' piece of mind.

    Sygate is pritty good. If you wanna spend some money though i'd recommend Norton 2004.


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  • #7
    nadir
    Registered Users, Registered Users 2 Posts: 1,419 ✭✭✭nadir


    nmap is pretty good, test your firewall here
    http://www.linux-sec.net/Audit/nmap.test.gwif.html
    i recconecnd doing two scans, one with -sX
    and a second with -P0
    It gives some good results check your logs, see if the passive x-mas tree (first scan) shows up.


  • #8
    Mutant_Fruit
    Closed Accounts Posts: 4,943 ✭✭✭Mutant_Fruit


    Why spend money on a firewall. There are plenty of great free ones.

    Kerio protects better than norton (according to a review i read before), and costs nothing, which is great. It's also a helluva lot easier to use and norton.

    I spent 2 hours trying to troubleshoot norton firewall (i forget its proper title) and in the end i gave up, and got my friend to uninstall and reinstall it. Wherever the rule was that was blocking his app was nicely hidden. Kerio has them in a nice, easily browsable window. NOT spread out over 6 differnet areas in the program.


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