Systems and methods for providing fine grained control over MSS values of transport layer connections

A method comprising:

• receiving, by a device intermediary to a plurality of clients and a plurality of servers, via a virtual local network (VLAN) interface a request to establish a transport layer connection on a VLAN assigned to the VLAN interface;
• identifying, by the device, a maximum segment size (MSS) value for the transport layer connection using at least a difference between a maximum transmission unit (MTU) value and a header size of the request, wherein identifying the MSS value for the transport layer connection includes
• i) determining that the MSS value is greater than a sum of a MTU configured on the VLAN interface and the MTU value of the VLAN minus the header size, and using as the MSS value the MTU value of the VLAN interface to the client minus the header size or
• ii) determining that the MSS value is less than a sum of a MTU configured on the VLAN interface and the MTU value of the VLAN minus the header size, and using as the MSS value the MTU value of the VLAN minus the header size;
• determining, by the device, that the MSS value is greater than a value for MSS specified by a profile configured for a virtual server of the device that is establishing the transport layer connection, the profile identifying an MSS value corresponding to one of a particular application or connection between a client and a virtual server or between a virtual server and a particular service;
• modifying, by the device responsive to the determination, the MSS value to the value for MSS specified by the profile;
• and
• establishing, by the device, the transport layer connection using the modified MSS value.