Configure Logging

Configure Logging

The Configure—>Logging page allows you to set the W3C logging levels and specify the remote server export the logs automatically.

The page is organised into the two sections below.

Logging Levels

Enabling W3C logging mode will start jetNEXUS ALB-X recording a W3C compatible log file. A W3C log is an access log for Web servers in which text files are generated containing data about each access request, including the source Internet Protocol ( IP ) address, the HTTP version, the browser type, the referrer page, and the time stamp. The format was developed by the World Wide Web Consortium ( W3C ), an organization that promotes standards for the evolution of the Web.

The file is in ASCII text, with space-delimited columns. The file holds comment lines beginning with the # character. One of these comment lines is a line naming field (providing column names) so that data can be mined.

There are separate files for HTTP and FTP protocols.

HTTP W3C Logging:

None:

W3C logging is off.

Brief:

The fields present are:

#Fields: time c-ip c-port s-ip method uri x-c-version x-r-version sc-status cs-bytes sr-bytes rs-bytes sc-bytes x-percent time-taken x-round-trip-time cs(User-Agent) x-sc(Content-Type).

Full:

This is a more processor-compatible format with separate date and time fields. See the fields summary below for information on what the fields mean. The fields present are:

#Fields: date time c-ip c-port cs-username s-ip s-port cs-method cs-uri-stem cs-uri-query sc-status cs(User-Agent) referer x-c-version x-r-version cs-bytes sr-bytes rs-bytes sc-bytes x-percent time-taken x-round-trip-time x-sc(Content-Type).

Site:

This format is very similar to “Full” but has an additional field. See the fields summary below for information on what the fields mean. The fields present are:

#Fields: date time x-mil c-ip c-port cs-username s-ip s-port cs-host cs-method cs-uri-stem cs-uri-query sc-status cs(User-Agent) referer x-c-version x-r-version cs-bytes sr-bytes rs-bytes sc-bytes x-percent time-taken x-round-trip-time x-sc(Content-Type).

Diagnostic:

This format is filled with all sorts of information relevant to development and support staff. See the fields summary below for information on what the fields mean. The fields present are:

#Fields: date time c-ip c-port cs-username s-ip s-port x-xff x-xffcustom cs-host x-r-ip x-r-port cs-method cs-uri-stem cs-uri-query sc-status cs(User-Agent) referer x-c-version x-r-version cs-bytes sr-bytes rs-bytes sc-bytes x-percent time-taken x-round-trip-time x-trip-times(new,rcon,rqf,rql,tqf,tql,rsf,rsl,tsf,tsl,dis,log) x-closed-by x-compress-action x-sc(Content-Type) x-cache-action X-finish

FTP W3C Logging:

Brief:

#Fields: date time c-ip c-port s-ip s-port r-ip r-port cs-method cs-param sc-status sc-param sr-method sr-param rs-status rs-param

Full:

#Fields: date time c-ip c-port s-ip s-port r-ip r-port cs-method cs-param cs-bytes sc-status sc-param sc-bytes sr-method sr-param sr-bytes rs-status rs-param rs-bytes

Diagnostic:

#Fields: date time c-ip c-port s-ip s-port r-ip r-port cs-method cs-param cs-bytes sc-status sc-param sc-bytes sr-method sr-param sr-bytes rs-status rs-param rs-bytes

edgeNEXUS w3c Logging:

Client’s Network Address and Port:

This will show the true client IP address along with the port.

Client’s Network Address:

This will show the true client IP address only.

Forwarded-For Address and Port:

This will show the details held in the XFF header including the address and port.

Forwarded-For Address:

This will show the details held in the XFF header including the address only.

Show Statistics in edgeNEXUS Headers:

On:

This will add a edgeNEXUS header and include gzip compression statistics. Example: edgeNEXUS: version 3.42.1.1475, 1232/4014 (69%)

Off:

This will turn off statistics within the header but the header will still be present. Example: edgeNEXUS: version 3.42.1.1475, On, [Laptop Demo 1 Primary]

Hidden:

No edgeNEXUS header shown at all.

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Remote Log Storage

All W3C logs are stored compressed on the jetNEXUS ALB-X every hour. The oldest files will only be deleted when 30% of disk space is remaining. Should you wish to export these to a remote server for safekeeping you can configure that below using an SMB share.

Remote Log Storage:

Tick the box to enable remote log storage.

IP Address:

Add in the IP address of your SMB server. This should be in dotted decimal notation. Example: 10.1.1.23

Share Name:

Add in the share name on the SMB server. Example: w3c.

Directory:

Add in the directory on the SMB server. Example: /log.

Username:

Add in the username for the SMB share.

Password:

Add in the password for the SMB share.

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Field Summary

HTTP

Condition Description
Date Not localised = always YYYY-MM-DD (GMT/UTC)
Time Not localised = HH:MM:SS or HH:MM:SS.ZZZ (GMT/UTC)
* Note-unfortunately this has two formats (Site has no .ZZZ milliseconds)
x-mil Site format only = millisecond of time-stamp
c-ip Client IP as best can be derived from network or X-Forwarded-For header
c-port Client port as best can be derived from network or X-Forwarded-For header
cs-username Client’s user-name request field
s-ip ALB’s listening port
s-port ALB’s listening VIP
x-xff Value of X-Forwarded-For header
x-xffcustom Value of configured-named X-Forwarded-For type request header
cs-host Host name in the request
x-r-ip IP address of content server used
x-r-port Port of content server used
cs-method HTTP request method * except Brief format
method * Only brief format uses this name for cs-method
cs-uri-stem Path of the requested resource * except Brief format
cs-uri-query Query for the requested resource * except Brief format
uri * brief format logs a combined path and query-string
sc-status HTTP response code
cs(User-Agent) Browser’s User-Agent string (as sent by client)
referer Referring page (as sent by client)
x-c-version Client’s request HTTP version
x-r-version Content-Server’s response HTTP version
cs-bytes Bytes from client, in the request
sr-bytes Bytes forwarded to content server, in the request
rs-bytes Bytes from content-server, in the response
sc-bytes Bytes sent to client, in the response
x-percent Compression percentage * = 100 * ( 1 – output / input) including headers
time-taken How long the content-server took in seconds
x-trip-times
new millisecond from connect to posting in “newbie list”
rcon millisecond from connect to making content-server connection
rqf millisecond from connect to receiving the first byte of request from the client
rql millisecond from connect to receiving the last byte of request from the client
tqf millisecond from connect to sending the first byte of request to the content-server
tql millisecond from connect to sending the last byte of request to the content-server
rsf millisecond from connect to receiving the first byte of response from the content-server
rsl millisecond from connect to receiving the last byte of response from the content-server
tsf millisecond from connect to sending the first byte of response to the client
tsl millisecond from connect to sending the last byte of response to the client
dis millisecond from connect to disconnect (both sides – last one to disconnect)
log millisecond from connect to this log record

usually followed by (Load-balance policy and reasoning)

x-round-trip-time How long ALB took in seconds
x-closed-by What action caused the connection to be closed (or kept open)
x-compress-action How compression was carried out, or prevented
x-sc(Content-Type) Content-Type of response
x-cache-action How caching responded, or was prevented
x-finish Trigger that caused this log row

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