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Port scanning.. should i be concerned ??

Discussion in 'Security' started by keat63, Nov 27, 2014.

  1. keat63

    keat63 Well-Known Member

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    Chaps.

    I installed CSF this afternoon and can see 3 servers which have been port scanning.
    All 3 servers are in the same data centre as my server.

    all on the same subnet range

    lets assume i'm on xxx.xxx.221.199
    The 3 other servers were

    xxx.xxx.221.8 11 hits in the last 161 seconds - *Blocked in csf* for 3600 secs
    xxx.xxx.220.18 11 hits in the last 166 seconds - *Blocked in csf* for 3600 secs
    xxx.xxx.220.23 11 hits in the last 276 seconds - *Blocked in csf* for 3600 secs

    When i try to connected to these ip's in my browser each one is showing some form of iis7 landing page with a blue logo and welcome in various languages.
     
    #1 keat63, Nov 27, 2014
    Last edited: Nov 27, 2014
  2. smoge

    smoge Well-Known Member

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    Report to your data center with logs
     
    #2 smoge, Nov 27, 2014
  3. keat63

    keat63 Well-Known Member

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    I actually called the server provider, to ask if these servers were anything to do with them, maybe DNS servers or similar.
    The guy confirmed that they are indeed their servers, but these are other customers servers.
    I've checked again this evening and it seems that CSF has blocked them permanently
     
    #3 keat63, Nov 27, 2014
  4. 24x7ss

    24x7ss Well-Known Member

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    Block the IP's from which port scanning done. File Abuse complaint to your DC so that they have to take action on that servers.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #4 24x7ss, Nov 27, 2014
  5. keat63

    keat63 Well-Known Member

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    i've reported them this morning.
    Thanks
     
    #5 keat63, Nov 28, 2014
  6. Serra

    Serra Well-Known Member

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    As for the question, "Should you be worried?" No, you should not be worried. Port scanning is a very easy task for script using hackers. On a secure server, it really isn't all that useful or dangerous.
     
    #6 Serra, Dec 1, 2014
  7. quizknows

    quizknows Well-Known Member

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    Generally when I get reports like these in my data center, it is because the other customers have dropbox with the lansync feature enabled. Lansync sends out tons of broadcast traffic. Likely that's what it is; I'd just block them. You can be sure if your logs show port 17500 that it is dropbox and not intentionally malicious.

    I usually see it on windows servers, which is consistent with you seeing IIS.
     
    #7 quizknows, Dec 2, 2014
  8. cPanelMichael

    cPanelMichael Technical Support Community Manager
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    Right, as mentioned, the scan itself is relatively harmless. Note that if you are concerned about overall security of your system, the Security Advisor is a good place to start:

    Security Advisor

    Thank you.
     
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    #8 cPanelMichael, Dec 16, 2014
  9. keat63

    keat63 Well-Known Member

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    I'm still tweaking security advisor and csf, but still have a heck of a lot to learn.
     
    #9 keat63, Dec 16, 2014
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