NOTE: This is untested.

This only applies to Federation Operators and not to individual sites

Download NXLog Community Edition from here:

https://nxlog.co/products/nxlog-community-edition/download

and install it. Make of note of where the nxlog.conf file is.

Edit the nxlog.conf file to read, making sure that the ROOT points to the directory it's installed in:

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 _exec>
    Module      xm_exec
</Extension>

<Output syslog_tls>
    Module      om_ssl
    Host        10.12.101.19
    Port        6514
#   CAFile      c:/Program Files (x86)/nxlog/data/cacert.pem
#    CertFile    c:/Program Files (x86)/nxlog/data/clientreq.pem
#    CertKeyFile c:/Program Files (x86)/nxlog/data/clientkey.pem
    AllowUntrusted 1
    OutputType	Syslog_TLS
    Exec        to_syslog_ietf();
</Output>

<Output syslog_tcp>
    Module      om_tcp
    Host        10.12.101.19
    Port        601
    OutputType  Syslog_TLS
    Exec        to_syslog_ietf();
</Output>

<Input eventlog>
    Module  im_msvistalog
    <QueryXML>
      <QueryList>
        <Query Id="0" Path="System">
          <Select Path="System">*[System[Provider[@Name='NPS']]]</Select>
          <Select Path="Security">*[System[Provider[@Name='Microsoft-Windows-Security-Auditing'] and Task = 12552]]</Select>
        </Query>
      </QueryList>
    </QueryXML>
    <Exec>
	  if $ClientName =~ /NRPS/i drop();
	  if $ProxyPolicyName =~ /NRPS/i drop();
	  $FederationID = "000X0";
	  if $ClientName == ''
	  {
	    $OperatorName = "1something.here";
	  }
	  else
	  {
	    $OperatorName = $ClientName;
	  }
    </Exec>
</Input>

<Route 1>
    Path        eventlog => syslog_tcp
</Route>

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>                                                                    

<Output syslog_tls>
    Module      om_ssl
    Host        212.219.243.132
    Port        6514
#    CAFile      c:/Program Files (x86)/nxlog/data/cacert.pem
#    CertFile    c:/Program Files (x86)/nxlog/data/clientreq.pem
#    CertKeyFile c:/Program Files (x86)/nxlog/data/clientkey.pem
    AllowUntrusted 1
    OutputType	Syslog_TLS
    Exec        to_syslog_ietf();
</Output>

<Output syslog_tcp>
    Module      om_tcp
    Host        212.219.243.132
    Port        601
    OutputType  Syslog_TLS
    Exec        to_syslog_ietf();
</Output>

<Input eventlog>
    Module  im_msvistalog
    <QueryXML>
      <QueryList>
        <Query Id="0" Path="System">
          <Select Path="System">*[System[Provider[@Name='NPS']]]</Select>
          <Select Path="Security">*[System[Provider[@Name='Microsoft-Windows-Security-Auditing'] and Task = 12552]]</Select>
        </Query>
      </QueryList>
    </QueryXML>
</Input>

<Route 1>
    Path        eventlog => syslog_tcp
</Route>

Save the file and restart the service.

The stanza, syslog_tls, is just there for information. It's not actually used in this configuration. At a later date we'll be looking at encryption but there's a PKI to build.

This is all fairly self-explanatory. OutputType Syslog_TLS is needed to enforce the RFC5424 standards along with Exec to_syslog_ietf(). Not sure why both are needed but they really are.

In the Eventlog config the QueryXML is extracted from Windows Event Log (Event Viewer → Custom View →. Server Roles. Right click on Network Policy…. Choose Properties, Edit Filter, XML and copy the XML into the NXLog config).

Some customisation might be needed to filter only for traffic between sites, rather than traffic to/from Jisc NRPS.