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Showing content from https://github.com/NLog/NLog/wiki/Network-target below:

Network target · NLog/NLog Wiki · GitHub

Sends log messages over the network using Tcp / Udp / Tls / Http / Https

Platforms Supported: All - Requires nuget-package NLog.Targets.Network since NLog v6

For SOAP-based webservice support over HTTP and HTTPS use WebService target.

<targets>
  <target xsi:type="Network"
          name="String"
          address="Layout"
          onOverflow="Enum"
          newLine="Boolean"
          lineEnding="CRLF|LF|CR|Null|None"
          layout="Layout"
          maxMessageSize="Integer"
          encoding="Encoding"
          connectionCacheSize="Integer"
          maxConnections="Integer"
          maxQueueSize="Integer"
          keepConnection="Boolean"
          onConnectionOverflow="Enum"
          keepAliveTimeSeconds="Integer"
          sslProtocols="Enum" 
/>
</targets>

Read more about using the Configuration File.

name - Name of the target.

layout - Layout used to format log messages. Layout Required. Default: ${longdate}|${level:uppercase=true}|${logger}|${message:withexception=true}
encoding - Encoding to be used. Encoding Default: utf-8
newLine - Indicates whether to append newline at the end of log message. Boolean Default: False
lineEnding - Line Ending to be used if newLine is set to true. LineEndingMode Default: CRLF. Not used if newLine is false. Introduced in 4.3.8. Possible values:
- CRLF - Carriage Return and Line Feed (ASCII 13, ASCII 10). (default)
- CR - Carriage Return (ASCII 13).
- LF - Line Feed (ASCII 10).
- NULL - Null terminator (ASCII 0)
- None - No end of line characters.
compress - Use compression to reduce message size. Default: None

Introduced with NLog 5.0
- None - No compression (Default)
- GZip - GZip with optimal compression
- GZipFast - GZip with fastest compression
compressMinBytes - Use compression only when message size is higher than limit to reduce overhead in cpu-usage and additional headers. Default: 0

Introduced with NLog 5.0
maxMessageSize - Maximum message size in bytes. Integer Default: 65000

Notice when using UDP and the message-size exceeds MTU-size (default 1500 bytes), then IP fragmentation will happen. If network-switch/router has DontFragment enabled, then it will drop large network packets. Usually UDP is only used on local network since no authentication or security, and the network-switch seldom has DontFragment enabled (or under your control to be configured).
onOverflow - Action that should be taken if the message-size is larger than maxMessageSize. Possible values:
- Discard - Discard the entire message.
- Error - Report an error.
- Split - Split the message into smaller pieces (Default)

address - Network address. Layout
The network address can be:
- tcp://host:port - TCP (auto select IPv4/IPv6)
- tcp4://host:port - force TCP/IPv4
- tcp6://host:port - force TCP/IPv6
- udp://host:port - UDP (auto select IPv4/IPv6)
- udp4://host:port - force UDP/IPv4
- udp6://host:port - force UDP/IPv6
- http://host:port/pageName - HTTP using POST verb
- https://host:port/pageName - HTTPS using POST verb
keepConnection - Indicates whether to keep connection open whenever possible. Not used for stateless protocols (= http, https) Boolean Default: True
connectionCacheSize - Size of the connection cache (number of connections which are kept alive). Integer Default: 5
maxConnections - Maximum current connections when keepConnection = false. 0 = no limit. Integer Default: 100 (Before NLog 5.0 the default was 0)

Introduced in NLog 4.2.1
onConnectionOverflow - Action that should be taken when open connections are higher than limit maxConnections.

Introduced in NLog 4.2.1.

Possible enum values:
- Discard - Discard new messages when reaching limit (Default) (Before NLog 5.0 it was enum value DiscardMessage)
- Grow - Send message and ignore limit (Before NLog 5.0 it was enum value AllowNewConnnection)
- Block - Block until pending connections has been freed.
maxQueueSize - Maximum queue size for a single connection. 0 means no limit. Integer. Default: 10000 (Before NLog 5.0 the default was 0)

NLog 4.6.7 enabled queue-support for http/https and NLog 4.7.1 activated this setting for http/https. NLog 5.0.0 enabled queue-support for UDP.
onQueueOverflow - Action that should be taken if pending queue of messages is larger than maxQueueSize.

Introduced with NLog 5.0
- Discard - Discard the entire message (Default)
- Grow - Ignore limit and grow the queue.
- Block - Block until queue is below limit.
KeepAliveTimeSeconds - Idle time before first TCP keep-alive probe is sent. Faster detection of stale TCP connections. Currently only implemented for TCP. Integer. Default: 0 (Disabled)

Introduced in NLog 4.6
SendTimeoutSeconds - Waiting time before TCP socket send-operation fails with timeout error. Default wait forever when network cable unplugged and tcp-buffer becomes full. Integer. Default: 0 (Disabled)

Introduced in NLog 5.3.4
NoDelay - Disable the delayed ACK timer, and avoid delay of 200 ms. Default = true.

Introduced in NLog 5.5. Before NLog 6.0 it was default = false.
sslProtocols - Enables SSL/TLS protocols. Default no SSL/TLS is used. Currently only implemented for TCP. Invalid certificates are not supported.

Introduced in NLog 4.6

Possible values (combination allowed, comma separated):
- None - No SSL/TLS is used
- Default - Accepts Tls or Ssl3
- Ssl2 - really not recommended
- Ssl3 - not recommended
- Tls - TLS 1.0
- Tls11 - TLS 1.1
- Tls12 - TLS 1.2
SslCertificateFile - Enables loading SSL certificate from local file, instead of injecting into operating system cache (Blank value means disable SSL certificate validation)

Introduced in NLog 6.0
SslCertificatePassword - When password is needed for loading SSL certificate from local file using SslCertificateFile

Introduced in NLog 6.0

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