IPBan – The Simplest Way to Block Hackers and Bot Nets




IPBan for Windows Donation

Is your server getting hacked? Do you need to block ip addresses automatically? Dealing with a brute force attack? Don’t want to spend your life savings on SysPeace or other overly priced security software? IPBan is for you.

A while ago, I noticed a disturbing trend in the event viewer on one of our dedicated Windows servers. We were getting thousands of failed login attempts to terminal services (remote desktop). I decided I would enable the terminal services auto-ban, so after 5 login attempts the ip address would get banned for 24 hours. This only solved part of the problem, as the attacker continued to flood our server with requests, causing the windows logon process (csrss.exe kept appearing and disappearing in task manager) to continually spin up and shut down. This actually caused significant CPU (10%+) and disk IO as the event viewer continually wrote failed login attempts.

After searching the Interwebs for a better way, I did not find anything that I liked or that didn’t spike my CPU usage, so I decided to make a free (if you install it yourself) tool in C# to auto-ban ip addresses. This tool is constantly improving. Right now it can block ip addresses as found in the event log for audit-failure events. It is very configurable as well.

Features include:
– Unlimited number of ip addresses to ban
– Duration to ban ip address
– Number of failed login attempts before ban
– Whitelist of comma separated ip addresses or regex to never ban
– Blacklist of comma separated ip addresses or regex to always ban
– Custom prefix to windows firewall rules
– Custom keywords, XPath and Regex to parse event viewer logs for failed login attempts
– Refreshes config so no need to restart the service when you change something
– Highly configurable, ban anything that comes through Windows Event Viewer
– A GREAT and FREE (if you install it yourself) alternative to RdpGuard or Syspeace
– Contains configuration to block Remote Desktop attempts, Microsoft SQL Server login attempts and MySQL Server login attempts by default
– Runs on Linux and Windows

If you found IPBan useful, would you consider helping support the project by donating? Thank you for your consideration.

I am also willing to do contracting work to improve IPBan if it doesn’t fit your needs or to help you set it up on your servers. Please email me at [email protected] if you would like paid services.

*INSTRUCTIONS*: https://github.com/jjxtra/IPBan




Windows IPBan Donation

Need help configuring IPBan? I’m happy to help with simple questions. For more involved assistance, I do consulting. Please email me at [email protected] and I’d be happy to consider your proposal.

Testimonials:

A few days ago I was checking the event logs for my server that hosts a MSSQL DB. I could see that I was under attack by a port scanner (changing IP addresses for each attack ‘period’). I know I should not have MSSQL exposed to the world but the users are remote so it was the easiest solution for me. Anyway, I came across IPBAN. Because of the concise directions on your Git repository I was able to easily setup a service. The results were immediate, as the banlog.txt file had an entry immediately after starting the service, thus putting an end to the current attack. The purpose of this email is simply to express my gratitude for developing the program. The people responsible for the attack are the lowlifes of the internet while you are on the complete opposite side of the scale! Thank you, thank you, thank you for the help.

– Jim

Bravo! This is a master piece!

– Periklis

Really a neat tool. This really works as advertised, and wow does it cut down on the noise. Your code structure made it really easy as well to add a couple lines to immediately ban non-US IPs (using a 3rd party geocoding service). Thanks for this great tool.

– Matt C




Windows IPBan Donation
Visit this Project on GitHub
372 comments on “IPBan – The Simplest Way to Block Hackers and Bot Nets
  1. Alex says:

    Hi Again!

    I have increased failed attempts up to 10, set expire time to 30 sec, I have no IP’s or usernames blacklisted, no Regex Blacklist, I have a set of whitelisted static IP’s and user names, and LAN IP’s whitelisted with Regex.

    I’ve run IPBan with Debug for testing on why my phone it’s getting banned everytime, and even with expire count set to 30 secs, and no data set on Blacklist config, log always shows this:

    2018-06-21 10:51:30.5954|INFO|FileLogger|Incrementing count for ip xxx.xxx.xx.xxx to 1, user name:
    2018-06-21 10:51:30.6110|ERROR|FileLogger|Banning ip address: xxx.xxx.xx.xxx, user name: , black listed: True, count: 1
    2018-06-21 10:51:30.6267|INFO|FileLogger|Ignoring whitelisted ip address xx.xxx.xxx.xx, user name:

    (this last INFO, indicates my WAN IP, not the one from my device)

    I don’t want to whitelist this IP because it’s not a static one, and there are several devices that have dynamic IP’s and connect to my RDP server (Win 2012R2)

    Of course, log and IPBan console shows Blacklist info and it’s all empty:

    2018-06-21 10:51:15.5221|INFO|FileLogger|Blacklist: , Blacklist Regex:

    IPBan it’s compiled from github and it’s version 1.3.4

    Thanks!

    • jjxtra says:

      Please update, the correct version is 1.2.5, the last file was mis-named.

      • Alex says:

        Hi jjxtra,

        Thank you for pointing out, problem seems to be gone so far. But another question, could my problem be related to the fact that were more than 10 failed attemps inside my event logs? Meaning, how does IPBan store failed IP events? So if this happens again just cleaning or setting up a regular event viewer cleaning could solve the problem.

        Thank you!

        • jjxtra says:

          The problem was due to a bug in the software.

          • Alex says:

            Hi again jjxtra!

            My config remains the same:

            FailedlLoginAttemptsBeforeBan = 6
            BanTime = 0
            BanFileClearOnRestart = false
            ExpireTime = 50min
            MinimumTimeBetweenFailedLoginAttempts = 5 secs
            Whitelist = localhost + some static remote addresses
            WhitelistRegex = 192\.168\.0\.* (for LAN)
            Blacklist = none (as default)
            BlacklistRegex = none (as default)
            AllowedUserNames = RDP usernames

            These are the values I’ve changed from the default config file, with the exception of ‘Blacklist’ values, I’ve listed them, but I’ve never changed them.

            Yesterday IPBan catched a failed logging attempt, total count = 1, I’ve checked the logs manually and only found two entries with the same IP, here’s the log from IPBan. Could it be that it’s banning all blank/empty/null usernames because it’s blacklisting them?

            2018-07-02 23:44:06.0460|INFO|FileLogger|Processing xml: 140034140x40000000000000003324003Microsoft-Windows-RemoteDesktopServices-RdpCoreTS/OperationalXXXXXXXX.XX.XX.XX
            2018-07-02 23:44:06.0928|INFO|FileLogger|*LOGIN FAIL* IP: XX.XX.XX.XX, USER:
            2018-07-02 23:44:06.1085|INFO|FileLogger|Processing xml: 4776001433600x8010000000000000777673SecurityXXXXXXMICROSOFT_AUTHENTICATION_PACKAGE_V1_0ADMIN 00010xc0000064
            2018-07-02 23:44:06.1241|INFO|FileLogger|No nodes found for xpath //Data[@Name='IpAddress']
            2018-07-02 23:44:06.1241|INFO|FileLogger|Regex \s*?(?.+)\s*? did not match any nodes with xpath //Data[@Name='Workstation']
            2018-07-02 23:44:06.1397|INFO|FileLogger|Processing xml: 4625001254400x8010000000000000777674SecurityXXXXXXS-1-0-0--0x0S-1-0-0ADMIN 00010xc000006d%%23130xc00000643NtLmSsp NTLM--00x0---
            2018-07-02 23:44:06.1710|INFO|FileLogger|Parsing as IP failed, checking dns '-'
            2018-07-02 23:44:08.5147|INFO|FileLogger|Parsing as dns failed '-'
            2018-07-02 23:44:08.5303|INFO|FileLogger|Regex \s*?(?.+)\s*? did not match any nodes with xpath //Data[@Name='IpAddress']
            2018-07-02 23:44:08.5303|INFO|FileLogger|No nodes found for xpath //Data[@Name='Workstation']
            2018-07-02 23:44:08.5459|INFO|FileLogger|Processing xml: 102044170x40000000000000003324004Microsoft-Windows-RemoteDesktopServices-RdpCoreTS/OperationalXXXXXX
            2018-07-02 23:44:08.5616|INFO|FileLogger|Regex ^\s*?14$\s*? did not match any nodes with xpath //Opcode
            2018-07-02 23:44:08.5616|INFO|FileLogger|Processing xml: 103044170x40000000000000003324005Microsoft-Windows-RemoteDesktopServices-RdpCoreTS/OperationalXXXXXXX0
            2018-07-02 23:44:08.5772|INFO|FileLogger|Regex ^\s*?14$\s*? did not match any nodes with xpath //Opcode
            2018-07-02 23:44:18.9990|INFO|FileLogger|Incrementing count for ip XX.XX.XX.XX to 1, user name:
            2018-07-02 23:44:19.0147|ERROR|FileLogger|Banning ip address: XX.XX.XX.XX, user name: , black listed: True, count: 1

            • jjxtra says:

              Most likely. I’ve removed the allowed user name (user name whitelist) in the latest version because of this problem, and of people mis-typing their user name and getting locked out. I would suggest to set allowed user name to blank.

      • Charith says:

        Hi,

        I have been using a old version of IP ban for couple of years and just installed the this new version. Is there any reason its not creating the log files in the directory and there is no banscript text file i used to see in the folder

        Thank you.

        Charith

        • jjxtra says:

          Log level is warn level by default now, so it won’t create the log file until you get a warn. Change to Info to see more messages. Add nlog.config to folder.
          Banscript was taken out a while ago, it was no longer needed as the firewall itself is queried to get existing rules and banned ip addresses.

  2. Alex says:

    Hello!

    First of all, wonderful tool! Thanks for sharing it

    I’ve been using IPBan for two weeks now, It’s been working like a charm, but since yesterday, everytime I connect from home or from my phone through RDP, bans me everytime!

    I’ve whitelisted my username, removed my ip’s from banlog, and I have set failed login attempts to a value of 6.

    Curious thing, from my phone for example, I can connect to RDP, I can see the desktop and even IPBan console window. But after a minute or less, IPBan just get’s my IP and throws it into the banzone.

    What am I doing wrong?

    Security logs detail my username (whilelisted) and IP from my machine, and RDP accepts and establish connection. Event ID 4624.

  3. Rob Morin says:

    I’m trying to run the binaries compiled on 5/23/18 on a Windows 7 Home Premium box and I’m getting the following error:
    2018-06-12 07:18:04.3764|INFO|FileLogger|Started IPBan service
    2018-06-12 07:18:05.2814|ERROR|FileLogger|Failed to create event viewer watcher:
    System.Diagnostics.Eventing.Reader.EventLogNotFoundException: The specified cha
    nnel could not be found. Check channel configuration
    at System.Diagnostics.Eventing.Reader.EventLogException.Throw(Int32 errorCode
    )
    at System.Diagnostics.Eventing.Reader.NativeWrapper.EvtSubscribe(EventLogHand
    le session, SafeWaitHandle signalEvent, String path, String query, EventLogHandl
    e bookmark, IntPtr context, IntPtr callback, Int32 flags)
    at System.Diagnostics.Eventing.Reader.EventLogWatcher.StartSubscribing()
    at IPBan.IPBanService.SetupEventLogWatcher() in C:\Users\Jeff\Documents\GitHu
    b\Windows-IP-Ban-Service\IPBanService.cs:line 554
    2018-06-12 07:18:05.5374|INFO|FileLogger|Whitelist: 127.0.0.1,fe80::3190:9276:cb
    dd:65e5%10,192.168.1.2,::1,0.0.0.0,-, Whitelist Regex:
    2018-06-12 07:18:05.5424|INFO|FileLogger|Blacklist: , Blacklist Regex:
    Press ENTER to quit

    I’m not sure what to do.

    Thank you

  4. Meridio Veintiuno says:

    First of all, thanks to dev for this software!

    I want to share my experiences with IPBAN.  I´m a WINDOWS 7 user.  Trying to understand how it works, I´ve got some problems…

    Is IPBAN windows 7 compatible? (latest windows updates)
    Does regionalization (spanish language OS) affects operation?
    .NET 4.7 present (doesn´t allow 4.5 installation)
     In registry, Microsoft-Windows-RemoteDesktopServices-RdpCoreTS/Operational is not present. (error msg)

    This is my log dump;

    2018-06-04 13:04:21.2180|INFO|FileLogger|Started IPBan service
    2018-06-04 13:04:21.3370|ERROR|FileLogger|Failed to create event viewer watcher: System.Diagnostics.Eventing.Reader.EventLogNotFoundException: No se puede encontrar el canal especificado. Compruebe la configuración del canal
    en System.Diagnostics.Eventing.Reader.EventLogException.Throw(Int32 errorCode)
    en System.Diagnostics.Eventing.Reader.NativeWrapper.EvtSubscribe(EventLogHandle session, SafeWaitHandle signalEvent, String path, String query, EventLogHandle bookmark, IntPtr context, IntPtr callback, Int32 flags)
    en System.Diagnostics.Eventing.Reader.EventLogWatcher.StartSubscribing()
    en IPBan.IPBanService.SetupEventLogWatcher() en C:\Users\Jeff\Documents\GitHub\Windows-IP-Ban-Service\IPBanService.cs:línea 554
    2018-06-04 13:04:21.3370|INFO|FileLogger|Whitelist: 127.0.0.1,::1,192.168.2.201,0.0.0.0,-, Whitelist Regex:
    2018-06-04 13:04:21.3370|INFO|FileLogger|Blacklist: , Blacklist Regex:

     

    Thanks in advance!

     

     

    • jjxtra says:

      Have you tried with the very latest code? I added something to detect Windows 7 / Server 2008 and skip certain unsupported event logs.

      • Rob Morin says:

        I’m having this same problem (but in English) running on Windows 7 Home Premium. I’m trying to run on the binaries compiled on 5/23/18 and I have .NET 4.5 installed.

        Thanks in advance!
        Rob

        • jjxtra says:

          Please try building from source on github https://github.com/jjxtra/Windows-IP-Ban-Service. I am able to use it on Windows 7 Pro x64.

          • Rob Morin says:

            I’ve tried building from source, and it gave me errors related to NLog.
            “The type or namespace name ‘NLog’ could not be found (are you missing a using directive or an assembly reference?) Logger.cs line 8”

            “The type or namespace name ‘Logger’ could not be found (are you missing a using directive or an assembly reference?) Logger.cs line 26”

            “The referenced component ‘NLog’ cound not be found. Could not resolve this reference. Could not locate the assembly “NLog, Version=4.0.0.0, Culture=neutral, PublickKeyToken=….”. Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors.

            .nuget appears in the Solution Explorer, but there’s just NuGet.exe, NuGet.targets and NuGet.Config.

            I don’t normally compile .NET, so maybe I’m doing something wrong.

            Thanks in advance!
            Rob

          • Rob Morin says:

            I feel like I should clarify – I have NEVER compiled for Windows before. Could you provide any suggestions regarding how to handle the NLog error?

            Thank you,
            Rob

  5. Thomas Swafford says:

    First – fantastic tool!

    Question:  does the tool have the ability to parse acsii [text] log files?  For example, I’m looking for a way to read Exchange SMTP logs and have IPBAN pick up those failed logins as well.

    The default source directory is: C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs\FrontEnd\ProtocolLog\SmtpReceive

    Sample log entry to generate a ban is:

    2018-06-01T11:27:18.670Z,EXCH1\Default Frontend EXCH1,08D5C528F450549E,15,192.168.1.13:25,220.179.219.29:49383,*,,Inbound AUTH LOGIN failed because of LogonDenied

  6. MalcolmReynoldsWrap says:

    Getting the following error from the downloaded link on Sever 2012 R2. I am unable to comment out the lines using the GIThub download as the compiler fails.

    2018-05-23 14:00:40.5317|ERROR|FileLogger|Failed to create event viewer watcher: System.Diagnostics.Eventing.Reader.EventLogException: The specified query is invalid
    at System.Diagnostics.Eventing.Reader.EventLogException.Throw(Int32 errorCode)
    at System.Diagnostics.Eventing.Reader.NativeWrapper.EvtSubscribe(EventLogHandle session, SafeWaitHandle signalEvent, String path, String query, EventLogHandle bookmark, IntPtr context, IntPtr callback, Int32 flags)
    at System.Diagnostics.Eventing.Reader.EventLogWatcher.StartSubscribing()
    at IPBan.IPBanService.SetupEventLogWatcher() in C:\Users\Jeff\Documents\GitHub\Windows-IP-Ban-Service\IPBanService.cs:line 554

     

     

  7. RvdH says:

    To filter out UDP packets as well as TCP packets i needed to adjust the regex like shown below, Microsoft-Windows-RemoteDesktopServices-RdpCoreTS/Operational

    <!–
    <Regex>
    <![CDATA[
    (?<ipaddress>.*?):[0-9]+
    ]]>
    </Regex>
    –>
    <Regex>
    <![CDATA[
    \[?(?<ipaddress>.*?)\]?\:\d+
    ]]>
    </Regex>

  8. lockie says:

    hello, i ran the application and it’s giving me

    2018-05-23 05:23:14.9175|INFO|FileLogger|Started IPBan service
    2018-05-23 05:23:15.1395|ERROR|FileLogger|Failed to create event viewer watcher:
    System.Diagnostics.Eventing.Reader.EventLogNotFoundException: The specified cha
    nnel could not be found. Check channel configuration
    at System.Diagnostics.Eventing.Reader.EventLogException.Throw(Int32 errorCode
    )
    at System.Diagnostics.Eventing.Reader.NativeWrapper.EvtSubscribe(EventLogHand
    le session, SafeWaitHandle signalEvent, String path, String query, EventLogHandl
    e bookmark, IntPtr context, IntPtr callback, Int32 flags)
    at System.Diagnostics.Eventing.Reader.EventLogWatcher.StartSubscribing()
    at IPBan.IPBanService.SetupEventLogWatcher() in C:\Users\Jeff\Documents\GitHu
    b\Windows-IP-Ban-Service\IPBanService.cs:line 550
    2018-05-23 05:23:15.1555|INFO|FileLogger|Whitelist: 127.0.0.1,::1,192.168.1.251,
    0.0.0.0,-, Whitelist Regex:
    2018-05-23 05:23:15.1665|INFO|FileLogger|Blacklist: , Blacklist Regex:
    Press ENTER to quit

    • jjxtra says:

      Use latest github version, Windows 2008 has some work-arounds in that.

      • lockie says:

        Hi, I see that you have a new executable. I tried to update my existing files with the new executable you have and still getting the same error. Do i have to use Visual Studio to compile the git codes?

        • jjxtra says:

          Please try commenting out each group with a <!– … –> around the group until the error goes away. Let me know which group is causing the problem. What version of Windows are you on?

          • MalcolmreynoldsWrap says:

            I get a similar error : 2018-05-23 14:00:40.5317|ERROR|FileLogger|Failed to create event viewer watcher: System.Diagnostics.Eventing.Reader.EventLogException: The specified query is invalid
            at System.Diagnostics.Eventing.Reader.EventLogException.Throw(Int32 errorCode)
            at System.Diagnostics.Eventing.Reader.NativeWrapper.EvtSubscribe(EventLogHandle session, SafeWaitHandle signalEvent, String path, String query, EventLogHandle bookmark, IntPtr context, IntPtr callback, Int32 flags)
            at System.Diagnostics.Eventing.Reader.EventLogWatcher.StartSubscribing()
            at IPBan.IPBanService.SetupEventLogWatcher() in C:\Users\Jeff\Documents\GitHub\Windows-IP-Ban-Service\IPBanService.cs:line 554

            On Windows 2012 R2.

  9. Jaymer says:

    I had to modify the config file in 2 places to look for this provider since I’m using MS SQL Express

    <XPath>//Provider[@Name=’MSSQL$SQL1′]</XPath>

    (SQL1 is my instance name)

    Work great – blocking tons of those ba$terds

    thx – will donate

    jaymer…

    • jjxtra says:

      Glad to hear it! I should probably make it a regex, as long as it starts with MSSQL plus anything else it blocks it. I will do that in an update.

  10. Dale says:

    hi I have just downloaded ipban from git hub and then started to read the readme file and do not see a ipban.exe file like the directions say I have the files that I got from the download link at the top of the page but the files seem to be a few years behind. I see the readme file was updated 12 days ago but it really doesn’t give a clear walk threw to install a functional working ipban and do I need the ipban.exe or has that been fazed out now?

    Thanks Dale

  11. Michael says:

    Your zipped binary seems a couple years behind your github source???

  12. Robert says:

    A question concerning the IPBAN.exe.config file.

    The following section is commented out. Should this section be enabled? From the description it is not clear what it does “dropped packet failures from firewall drops to Windows”. What does this do and should it be enabled?

    <!– This group will block audit dropped packet failures from firewall drops to Windows
    <Group>
    <Keywords>0x8010000000000001</Keywords>
    <Path>Security</Path>
    <Expressions>
    <Expression>
    <XPath>//EventID</XPath>
    <Regex>^(4625|5152)$</Regex>
    </Expression>
    <Expression>
    <XPath>//Data[@Name=’SourceAddress’]</XPath>
    <Regex>
    <![CDATA[
    (?<ipaddress>.+)
    ]]>
    </Regex>
    </Expression>
    </Expressions>
    </Group>
    –>

    IPBAN is most excellent.

  13. Peter says:

    Wonderful little piece of software. I got rid of the occasional attempts to login on my server, But I am curious if it’s possible to have IPBan block another kind of intrusionattempt.
    I’m getting some Event 56, TermDD
    “The Terminal Server security layer detected an error in the protocol stream and has disconnected the client. Client IP: x.x.x.x.”

    Would it be possible to get the IP out from the EventData from those events?
    the only data under EventData in the .xml is ”
    \Device\Termdd
    x.x.x.x
    So I’m not sure how to modify the config file to read the IP out and put into the blocklist.

  14. David says:

    IPBan does not seem to be seeing and blacklisting events such as this:

    Login failed for user ‘sa’. Reason: Password did not match that for the login provided. [CLIENT: (IPv4 address)]

    Windows 2012, SQL 2014

    • jjxtra says:

      Not sure. Let me know if you find anything on your end.

      • David says:

        I have:

        0x90000000000000
        System

        //Provider[@Name=’MSSQLSERVER’]

        //Data

        <![CDATA[
        \[Client ?: ?(?.*?)\]
        ]]>

        Yet in the logfile, I can see:
        2016-09-12 00:00:00.6159|WARN|FileLogger|No nodes found for xpath //Provider[@Name=’MSSQLSERVER’]

        What would cause this?

  15. Alex says:

    Is it possible that the RegExp samples in the configfile are a bit off ?

    I had bad results with

    add key=”WhitelistRegex” value=”^(192\.168\.*)$”

    like mentioned in the sample. It still locked out local users from 192.168.x.x

    http://regexstorm.net/tester led me to:

    add key=”WhitelistRegex” value=”^(192\.168\..*)$”

    and https://regex101.com/ even explained the difference.

     

  16. Scott Demaret says:

    Will this work on Windows 12 server, I have been using ts_block but it does not work on Win12, I think becuase the IP is not listed in the event .

    thanks

    • jjxtra says:

      I’ve never tried. Best to stick with 2008 or 2012

      • Keynon says:

        I just tested this on Server 2012 R2 and it did not function. I found no way of getting the IP address of the source system to be logged. I followed the instructions but when I set the following rules it would not allow me to connect at all:

        Network security: LAN Manager authentication level — Send NTLMv2 response only. Refuse LM & NTLM
        Network security: Restrict NTLM: Audit Incoming NTLM Traffic — Enable auditing for all accounts
        Network security: Restrict NTLM: Incoming NTLM traffic — Deny all accounts

        The last rule – Deny All accounts prevented any client from connecting to the Server 2012 R2 system. Without that rule the IP is not logged.

        Not sure if there is anything that could be done to resolve this…but would be great if it could be resolved. I have several Terminal Servers that are stand alone – no domain that I really need a tool to work on. I have tested RDP Guard and it works – but a bit costly.

  17. Aim2xl says:

    Hi Jeff. Nice piece of work with IPBAN.  I’ve been using it on my home web server for three weeks now and it works perfectly.
    One log issue I need a heads up on to track down is this, if you can point me in the right direction that would be great. Thanks again
    2016-05-13 11:06:19.9093|ERROR|FileLogger|System.NullReferenceException: Object reference not set to an instance of an object.
    at IPBan.IPBanService.EventRecordWritten(Object sender, EventRecordWrittenEventArgs e) in C:\Users\Jeff\Desktop\Personal\DigitalRuby\DEV\Code\Utilities\IPBan\IPBanService.cs:line 377

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