How would I go about statically assigning the value of x-forward-for the end of an IIS message that is being read through IM_FIle?

I am doing testing of IIS Log files and I want to take a value from an internal system and add the x-forward-for field to the message.

I have tried adding it to the Input on im_file

Exec $Message = $x_forwarded_for + ' ' + 'x.x.x.x';

I have tried it as

$raw_event = $raw_event + 'x.x.x.x'

Either the value never shows up or it ends up outside of the message. What I need is for it to be inside the message. Essentially where the time-taken is on this example message I would end up with my static x-forwarded-for entry.

#Software: Microsoft Internet Information Services 10.0 #Version: 1.0 #Date: 2017-10-02 17:11:27 #Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) cs(Referer) sc-status sc-substatus sc-win32-status time-taken 2017-10-02 17:11:27 fe80::b5d8:132c:cec9:daef%6 RPC_IN_DATA /rpc/rpcproxy.dll 1d4026cb-6730-43bf-91eb-df80f41c050f@test.com:6001&CorrelationID=<empty>;&RequestId=11d6a78a-7c34-4f43-9400-ad23b114aa62&cafeReqId=11d6a78a-7c34-4f43-9400-ad23b114aa62; 80 TEST\HealthMailbox418406e fe80::b5d8:132c:cec9:daef%6 MSRPC - 500 0 0 7990 2017-10-02 17:12:57 fe80::a425:345a:7143:3b15%2 POST /powershell clientApplication=ActiveMonitor;PSVersion=5.1.14393.1715 80 - fe80::a425:345a:7143:3b15%2 Microsoft+WinRM+Client - 500 0 0 11279

Using one dedicated NXlog node as master collector that forwards logs to SIEM, I also dump all logs into a file and I rotate that file weekly, keeping 4 weeks worth of logs on the collector; this very clean setup is taken from the documentation and I like it - it works well (see Log rotate in documentation, example 103). Problem is: This consumes much disk, so I'll need to compress the rotated file. Can I add compression to that output to compress the rotate-copy? I'd prefer not using the example 113 in said log-rotation documentation page.

I'm fairly new to this, but wanted to get some pointers. I've been provided with a syslog.conf file, and am trying to determine what events are being logged. Can someone please let me know what I should be looking for? Alternatively if the syslog.conf file doesn't contain this info, where can I find what events are being logged? On the other hand, is there a standard list of event types that are automatically logged?

Hi,

I am new to NXLog and I am setting up relay log servers in IP ranges to collect and forward log events from hosts (different OS) with dynamically assigend IP addresses.

While doing so, I figured out that the forwarded log events missing important details about the orginating systems and I like to enrich the log events while receiving (accepting ) them with the following details:

• hostname as SOURCE_HOSTNAME
• ipv4 address as SOURCE_HOSTIP

How is the best practice to do so?

Rgds, Thorsten

hi who i can get iis web server logs and then send them to ossim log server?

Hello Guys, Im currently trialing nxlog enterprise version and specifically interested in agentless version of it. While working on it i have come across a blockade which seems to not forward logs from windows server machine to linux windows event collector(nxlog enterprise version is running). Im running nxlog version 5.1.6133 on ubuntu. Here are the details (SERVER details w.r.t im_wseventing module documentation) NAME="Ubuntu" VERSION="18.04.5 LTS (Bionic Beaver)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 18.04.5 LTS" VERSION_ID="18.04" Below are client details which forwards logs to server above using agentless method OS Name: Microsoft Windows Server 2019 Datacenter OS Version: 10.0.17763 N/A Build 17763 OS Manufacturer: Microsoft Corporation OS Configuration: Standalone Server Im getting following error message while trying to forward logs. Seeing this error in eventviewer under eventlog forwarding plugin. I have followed the documentation and generated certs and certs seems to be valid and working. Log Name: Microsoft-Windows-Forwarding/Operational Source: Microsoft-Windows-Forwarding Date: 10/28/2020 2:37:05 AM Event ID: 105 Task Category: None Level: Error Keywords: User: NETWORK SERVICE Computer: computer_name Description: The forwarder is having a problem communicating with subscription manager at address HTTPS://private_ip_address:5986/wsman/. Error code is 2150858819 and Error Message is 鿰柣ƴ. Event Xml: 105 0 2 0 0 0x8000000000000000 438 Microsoft-Windows-Forwarding/Operational computer_name HTTPS://private_ip_address:5986/wsman/ 2150858819 鿰柣ƴ I have tried even port 5985 and it also faces similar error. I have checked whether the server which is the ubuntu is reachable or not, did GET request using postman api tool.POST request seems to not work which might be the cause which might be behind this problem. Below is my nxlog config Module im_wseventing ListenAddr 0.0.0.0 Port 5986 Address https://private_ip_address:5986/wsman HTTPSCertFile %CERTDIR%/server-cert.pem HTTPSCertKeyFile %CERTDIR%/server-key.pem HTTPSCAFile %CERTDIR%/ca-cert.pem * * * * * * Module om_file File "/opt/nxlog/var/log/nxlog/windows_events.log" Path wseventing => file Let me know how do i overcome this issue if possible. Thanks.

Hello

windows ---> nxlog-------->graylog&splunk(syslog)

how can i do?
this conf is right?

p.s. graylog 192.168.1.20 splunk 192.168.1.21

------------------------------------My conf------------------------------------------------------------------ Panic Soft #NoFreeOnExit TRUE

define ROOT C:\Program Files (x86)\nxlog define CERTDIR %ROOT%\cert define CONFDIR %ROOT%\conf define LOGDIR %ROOT%\data define LOGFILE %LOGDIR%\nxlog.log LogFile %LOGFILE%

Moduledir %ROOT%\modules CacheDir %ROOT%\data Pidfile %ROOT%\data\nxlog.pid SpoolDir %ROOT%\data

<Extension _syslog> Module xm_gelf

</Extension>

<Extension _syslog> Module xm_syslog

</Extension>

<Input in>

Module im_msvistalog

</Input>

<Output out> Module om_udp Host 192.168.1.20 Port 10554 OutputType GELF </Output>

<Output out1> Module om_udp Host 192.168.1.21 Port 10554 Exec to_syslog_snare(); </Output>

<Route 1> Path in => out </Route>

<Route 2> Path in => out1 </Route>

Hi team, I'm sure this should be easy, but I'm not having much luck finding the answer elsewhere, can any of you help me? So I have (McAfee Firewall) log entries that look like this: > Time: 10/23/2020 08:09:36 AM > Event: Traffic > IP Address: 172.19.0.113 > Description: SNMP SERVICE > Path: C:\Windows\System32\snmp.exe > Message: Allowed Incoming UDP - Source 172.19.0.113 : (52676) Destination 172.23.25.135 : snmp (161) > Matched Rule: Adaptive Rule - snmp.exe I've got this being parsed as a multiline log entry with the following: > > Module xm_multiline > HeaderLine /^Time:.*/ > EndLine /^Matched Rule:.*/ > > > Module im_file > File 'C:\ProgramData\McAfee\Endpoint Security\Logs\FirewallEventMonitor.log' > PollInterval 1 > SavePos True > ReadFromLast True > Recursive True > RenameCheck False > Exec $FileName = file_name(); # Send file name with each message > InputType 5f917c0781064d07c2e8486a-multiline > So far so good - I get a multiline message come through, but I'd now like to parse it. So my first step is to split out the individual lines - ideally in the above eample I'd split the above message into 7 fields: > 'Time' -> '10/23/2020 08:09:36 AM' > 'Event' -> 'Traffic' > 'IP Address' -> 172.19.0.113 > ...etc So I'm guessing there's an **Exec** section required and some regex work, but I've not managed to get anything to work yet - has anyone else done anything similar here? thanks in advance, Jim

Hope someone can provide some pointers.

I have an application that uses mySQL database and it is installed on Windows Server 2019. I just downloaded NXLog CE on the same Windows Server 2019. I am new to this but the goal is to extract a table from mySQL and output it as JSON format so that I can ingest it to another platform. Appreciate if someone can point me to the right direction to make this work.

Thanks !

1. I am using https://nxlog.co/system/files/products/files/348/nxlog-ce-2.10.2150.msi to download the nxlog file.
2. I am using below configuration:

This is a sample configuration file. See the nxlog reference manual about the

configuration options. It should be installed locally and is also available

online at http://nxlog.org/docs/

Please set the ROOT to the folder your nxlog was installed into,

otherwise it will not start.

#define ROOT C:\Program Files\nxlog

define ROOT C:\Program Files (x86)\nxlog define ROOT C:\Program Files (x86)\nxlog

Moduledir %ROOT%\modules CacheDir %ROOT%\data Pidfile %ROOT%\data\nxlog.pid SpoolDir %ROOT%\data LogFile %ROOT%\data\nxlog.log

<Extension _json>    Module xm_json </Extension>

<Input in> Module im_msvistalog Query <QueryList>
<Query Id="0">
<Select Path="Security">* </Select>
<Select Path="Application">* </Select>
<Select Path="Setup">* </Select>
<Select Path="System">* </Select>
</Query>
</QueryList> <Exec> if ($EventID NOT IN (%aisiem%)) drop(); </Exec> </Input>

<Output out>    Module om_udp    Host CCE_IP_ADDRESS  Port 5154    Exec to_json(); </Output>

<Route 1>    Path in => out </Route>

3. Getting this error: 2020-10-22 19:11:05 WARNING stopping nxlog service 2020-10-22 19:11:05 WARNING nxlog-ce received a termination request signal, exiting... 2020-10-22 19:11:16 ERROR Failed to load module from C:\Program Files (x86)\nxlog\modules\output\om_udp   .dll, Invalid argument; Invalid argument 2020-10-22 19:11:16 ERROR module 'out' is not declared at C:\Program Files (x86)\nxlog\conf\nxlog.conf:52 2020-10-22 19:11:16 ERROR route 1>  is not functional without output modules, ignored at C:\Program Files (x86)\nxlog\conf\nxlog.conf:52 2020-10-22 19:11:16 WARNING no routes defined! 2020-10-22 19:11:16 WARNING not starting unused module in 2020-10-22 19:11:16 INFO nxlog-ce-2.10.2150 started

4. I am using windows 10. Please suggest what should I change to configure successfully.

Hello,

I'm trying to query some EventID with a specific SeverityValue in "im_msvistalog", the config is something like this:

<Input eventlog> Module im_msvistalog <QueryXML> <QueryList> <Query Id='0'> <Select Path='System'>*[System[(EventID=6005 or EventID=6008 or EventID=7036)]</Select> </Query> </QueryList>
</QueryXML> Exec if $SeverityValue NOT IN (2, 4) drop(); Exec $Message =~ s/(\t|\R)/ /g;

I'm trying for a test to output on file, but nothing is outputted.

Anyone has some hint?

Thanks

Hi everyone,

I'm getting this issue of

1. assignment failed at line 215, character 67 in C:\Program Files (x86)\nxlog\conf\nxlog.conf. statement execution has been aborted function 'strftime' failed at line 215, character 66 in C:\Program Files (x86)\nxlog\conf\nxlog.conf. expression evaluation has been aborted got 'unknown' for first argument of function 'strftime(datetime, string)'.

2. if-else failed at line 208, character 277 in C:\Program Files (x86)\nxlog\conf\nxlog.conf. statement execution has been aborted procedure 'parse_csv' failed at line 208, character 129 in C:\Program Files (x86)\nxlog\conf\nxlog.conf. statement execution has been aborted Not enough fields in CSV input, expected 17, got 0 in input ''

Below is the line the error is refering to:

1. Exec $EventTime = strftime($EventTime, '%Y-%m-%d %H:%M:%S, %z');
2. }

Kindly help me out to fix this issue and what is causing the error.

Thanks.

Hi guys,

I must forwarding some logs, but only of some users. this's my current configuration.

Panic Soft #NoFreeOnExit TRUE

define ROOT C:\Program Files (x86)\nxlog define CERTDIR %ROOT%\cert define CONFDIR %ROOT%\conf define LOGDIR %ROOT%\data define LOGFILE %LOGDIR%\nxlog.log LogFile %LOGFILE%

Moduledir %ROOT%\modules CacheDir %ROOT%\data Pidfile %ROOT%\data\nxlog.pid SpoolDir %ROOT%\data

<Extension _syslog> Module xm_syslog </Extension>

<Extension _charconv> Module xm_charconv AutodetectCharsets iso8859-2, utf-8, utf-16, utf-32 </Extension>

<Extension _exec> Module xm_exec </Extension>

<Extension _fileop> Module xm_fileop

# Check the size of our log file hourly, rotate if larger than 5MB
<Schedule>
    Every   1 hour
    Exec    if (file_exists('%LOGFILE%') and \
               (file_size('%LOGFILE%') >= 5M)) \
                file_cycle('%LOGFILE%', 8);
</Schedule>

# Rotate our log file every week on Sunday at midnight
<Schedule>
    When    @weekly
    Exec    if file_exists('%LOGFILE%') file_cycle('%LOGFILE%', 8);
</Schedule>

</Extension>

<Input eventlog> Module im_msvistalog <QueryXML> <QueryList> <Query Id='0'> <Select Path='Security'>*[System[(EventID=4720 or EventID=4634 or EventID=4625 or EventID=4624 or EventID=4726)]]</Select> </Query> </QueryList> </QueryXML> Exec $Message = 'EventID: ' + $EventID +' Source: '+ $IpAddress + ' Username: ' + $TargetUserName ; </Input>

<Output tcp> Module om_udp Host xx.xxx.xx.xxx Port xxx Exec to_syslog_bsd(); </Output>

<Route eventlog_to_tcp> Path eventlog => tcp </Route>

can you help me? thank you

Hello,

After looking on the community forum i didn't really get the answer i was seeking.

I'm sending windows log to a syslog and to a splunk,

I got some issue about parsing the Message part as you can see : https://cdn.discordapp.com/attachments/700242491227635714/766300884971159562/unknown.png

This is my conf : https://cdn.discordapp.com/attachments/700242491227635714/766301478897451048/unknown.png https://cdn.discordapp.com/attachments/700242491227635714/766301597541335060/unknown.png

Maybe this is not the good way to do it, i have to send in syslog because i'm sending it after to an elasticsearch and the splunk.

Thank you for your help :)

Hello In the end I have to come to you because I can't find the way to do it and I'm going a bit crazy.

I have a record entry from a file. This file sends the data in a disorderly way and I have managed to assign it to variables.

Now the only thing I want is to create an output in a file but with the order I need.

EJ of log entry :

user1 2020 barcelona 12 13:39 12 spaghetti

And I want an exit like

Place: <variable of place> , Date: <variable of date> , Age :<variable of age> To generate a line like this : Place : barcelona , Date : 2020 , Age : 12 ....

This is my config.

<Input LOG_IN> Module im_file File "C:\logs\u_ex*" SavePos TRUE <Exec> if $raw_event =~ /(.?)\s"(.?)"\s"(.?)"\s(.?)\s(.?)\s(.?)\s"(.?)"\s"(.?)"\s(.?)\s(.?)\s(.?)\s"(.?)"\s"(.?)"\s(.?)\s(.?)\s"(.?)"/; { $a = $1; $b = $2; $c = $3; $d = $4; $e = $5; $f = $6; $g = $7; $h = $8; $i = $9; $j = $10; $k = $11; $l = $12; $m = $13; $n = $14; $o = $15; $p = $16; } </Exec> </Input>

<Output file> Module om_file File "C:\logs\output.log" </Output>

Hi. I'm new to both Graylog and NxLog. I am getting the following errors when trying to add inputs.

2020-10-14 11:48:27 WARNING stopping nxlog service 2020-10-14 11:48:27 WARNING nxlog-ce received a termination request signal, exiting... 2020-10-14 11:48:28 ERROR invalid keyword: Output at C:\Program Files (x86)\nxlog\conf\nxlog.conf:66 2020-10-14 11:48:28 ERROR module 'graylog' has configuration errors, not adding to route 'graylog_route' at C:\Program Files (x86)\nxlog\conf\nxlog.conf:70 2020-10-14 11:48:28 ERROR route graylog_route is not functional without output modules, ignored at C:\Program Files (x86)\nxlog\conf\nxlog.conf:70 2020-10-14 11:48:28 WARNING no routes defined! 2020-10-14 11:48:28 WARNING not starting unused module win 2020-10-14 11:48:28 WARNING not starting unused module graylog 2020-10-14 11:48:28 INFO nxlog-ce-2.10.2150 started

I added the following lines to my config file

<Extension _gelf> Module xm_gelf </Extension>

<Input win> Module im_msvistalog Query <QueryList>
<Query Id="0">
<Select Path="Application"></Select>
<Select Path="System"></Select>
<Select Path="Security">*</Select>
</Query>
</QueryList> </Input>

<Output graylog> Module om_udp host 172.16.101.33 Port 12201 Output Type GELF </Output>

<Route graylog_route> Path win => graylog </Route>

Any help is appreciated.

In my design, there are collectors placed in security zones, receiving logs from a great number of Linux servers and forwarding the incoming to a Master Collector. This works perfectly fine :) My Collector's Input is defined like: ``` Module xm_syslog Module im_tcp Host 0.0.0.0 Port 514 Exec parse_syslog(); ``` but with one exception: In one of the zones I'm supposed to receive logs from the firewall - I can see in the nxlog.log the connection is accepted, but then it says ``` connection accepted from [X.X.X:X]:port couldn't bind tcp socket to [X.X.X.X]:514; cannot assign requested address ``` and I don't get any firewall logs. What is the proper fix for this?

I am trying to filter certain Windows Server events. I have the following code: if $EventID == '4737' AND $TargetSid == 'S-1-5-21-3629192509-3943823860-1568066966-20147' AND $SubjectUserSid == 'S-1-5-21-3629192509-3943823860-1568066966-20118' { drop(); } if $SubjectUserName == 'NETVAULT$' AND $SubjectUserSid == 'S-1-5-20' AND ($ProcessName == 'C:\Program Files (x86)\Quest\NetVault Backup\pgsql\bin\postgres.exe' OR $NewProcessName == 'C:\Program Files (x86)\Quest\NetVault Backup\pgsql\bin\postgres.exe') { drop(); } if $SubjectUserName == 'HVAC$' AND $SubjectUserSid == 'S-1-5-18' AND ($ProcessName == 'C:\Program Files (x86)\Delta Controls\enteliWEB\PostgreSQL\bin\postgres.exe' OR $NewProcessName == 'C:\Program Files (x86)\Delta Controls\enteliWEB\PostgreSQL\bin\postgres.exe') { drop(); } The first one says if the EventID, TargetSid, and SubjectUserSid are certain values, then drop the event. The second says that if the SubjectUserName and SubjectUserSid are certain values **and** either the ProcessName or NewProcessName are a certain value, then drop the event. The third basically is doing the same thing as the second one, except using different values. Do I have the syntax correct for this?

Hi, we are using NXlog to forward syslog messages, which works fine. But we have that strange in the forwarded message: 3.127.197.211 ****2020-10-13 09:58:54,443 message Konfig: Module im_udp Port 514 Host 0.0.0.0 Module om_udp Host dstserver.domain.com Port 514 Exec $raw_event = $MessageSourceAddress + " " + $raw_event; Does anyone know why that happens? Thanks, Thomas

hello i have i question about windows 2012 > nxlog ce > graylog my nxlog-ce ver is 2.10.2150

question : my nxlog-ce to graylog have question but the log is not go to graylog so im open windows taskmgr to see nxlog.exe PID and Internet connection

1. nxlog source ip and Destination is "ipv4 Loopback " 2.nxlog log : WARNING The following sources are omitted to avoid exceeding the limit in the generated query: Microsoft-Windows-Workplace Join/Admin Microsoft-Windows-WPD-ClassInstaller/Operational Microsoft-Windows-WPD-CompositeClassDriver/Operational Microsoft-Windows-WPD-MTPClassDriver/Operational Microsoft-WS-Licensing/Admin Setup WitnessClientAdmin

my nxlog.conf

Panic Soft #NoFreeOnExit TRUE

define ROOT C:\Program Files (x86)\nxlog define CERTDIR %ROOT%\cert define CONFDIR %ROOT%\conf define LOGDIR %ROOT%\data define LOGFILE %LOGDIR%\nxlog.log LogFile %LOGFILE%

Moduledir %ROOT%\modules CacheDir %ROOT%\data Pidfile %ROOT%\data\nxlog.pid SpoolDir %ROOT%\data

<Extension _syslog> Module xm_gelf </Extension>

<Input in>

Module im_msvistalog

</Input>

<Output out> Module om_udp Host Port 10554 OutputType GELF </Output>

<Route 1> Path in => out </Route>

so how can i do to Solve the problem

please help me thx~~