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fgilloteau_FTNT
Staff
fgilloteau_FTNT
Staff
September 11, 2019

Technical Tip: WAD increase client requested length

  • September 11, 2019
  • 0 replies
  • 2093 views
Description This article gives a useful tip to increase the max request length that can be requested by client workstations when using WAD explicit proxy.
Scope FortiOS 5.6 and above
Solution

When using the FortiGate as an explicit proxy, some users may encounter websites on which they are unable to use an HTTP POST request, like a file/comment on Facebook for example.

 

Problems may be seen if the HTTP request size is larger than the limit configured for the proxy. By default, the FortiGate proxy max-request-length is 4 kilobytes. Starting from FortiOS 5.6.11, the default value has been increased to 8 kilobytes.


To increase the maximum request length inside the web proxy, configure the following CLI settings:

config web-proxy global

    set max-request-length <Integer>

end



The value can be configured between 2 kilobytes and 64 kilobytes.

 

config web-proxy global

    set max-request-length <Integer>

    max-request-length Enter an integer value from <2> to <64> (default = <8>).

 

As per RFC 2616, 'Hypertext Transfer Protocol -- HTTP/1.1', there is no limitation defined for the size of an HTTP request. However, client and server implementations may have their own limitations.

An HTTP request from a browser that allows large HTTP requests may be rejected by the FortiGate proxy if it exceeds the configured limit.

 

Related documents:
Terms & ConditionsAccessibility statement