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  1. #1

    BruteForce Attack

    How often you have BF Attacks?

    If no damage, do you inform about it people reponsible for attacker's network (ISP, hosting service, admin etc...)?

    Is it somwhere any kind of general register/forum etc to report stuff like that?

    I have this today:

    The remote system 64.33.158.235 was found to have exceeded acceptable login failures on xxx.yyy.com... ; there was 149 events to the service sshd. As such the attacking host has been banned from further accessing this system. For the integrity of your host you should investigate this event as soon as possible.

    Executed ban command:
    /etc/apf/apf -d 64.33.158.235 {bfd.sshd}

    The following are event logs from 64.33.158.235 on service sshd (all time stamps are GMT +0100):

    Dec 28 05:36:57 vps sshd[26802]: Failed password for illegal user qmails from 64.33.158.235 port 42779 ssh2
    ....
    ....

  2. #2
    Join Date
    Jan 2005
    Location
    Scotland, UK
    Posts
    2,681
    I get lots of bruteforce attacks daily on multiple servers,

    I always spend an hour or so every day reporting all the ips too the proper abuse channels, and they are almost always found in the whois.

    Even just a basic template will do which you can just adjust apon having to send the email off, 9 times out of 10 you will not get a response but will notice within a few days that the ip is no longer online, can tell this via ping. I don't pay too much attention too this though since it's just a waiste of time, however it is always best too report it anyway.
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  3. #3
    Join Date
    Nov 2005
    Location
    Denver, CO
    Posts
    728
    I'm an @$$hole so yes, I always report it but I doubt that much is done in most cases. I forward logs and all the relevant info but usually you see the usual suspects come back and try again. example:

    a customer of time warner telecom did a ssh burte-force against me despite that I moved my ssh port. (no problem, he did a port scan). He was blocked and bfd blocked him. I reported the incident. Not a week later two different IPs on the same subnet tried again. Rince & repeat. two weeks later yet another IP on the same subnet tried again. I had 4 /32s banned from the same /24. I eventually just put the entire /24 into my IPTables deny list and I picked up the phone and called TWT's abuse number. Voice Mail, go figure.

    On the flip side, I've had providers respond immediately having callbacks on a few occasions. If it takes too much time/energy, it's not worth it. Me, I'm a dick so I like doing it knowing that somewhere some 14 y/o brat is having to explain to his mom and dad why their internet is being turned off.

  4. #4
    Join Date
    Jan 2005
    Location
    Scotland, UK
    Posts
    2,681
    Quote Originally Posted by CiscoMike
    I'm an @$$hole

    Quote Originally Posted by CiscoMike
    Me, I'm a dick
    I like you! you are like me, although people have better terms for me, some I just can't list on WHT
    Server Management - AdminGeekZ.com
    Infrastructure Management, Web Application Performance, mySQL DBA. System Automation.
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  5. #5
    Join Date
    May 2004
    Posts
    198
    Its better to block those IP address in the ISP's firewall or in the datacenter where your server is in and report to them

    You can also checkout with the ISP to whom the IP address belongs too, there are certain general spamblocks which you can search in the net and can checkout for them and can update them

    You can also place firewalls and security measures inorder to block them
    Waxdoll
    Quite, Cool & Adjustable, But Dangerous
    I Love Microsoft

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