red lion SN-66 series Software Manual

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red lion SN-66 series Software Manual Manual pdf 119 page image

Revised 2017-08-31 Network TabDrawing No. LP0997-C TCP Global SettingsSixnet ® Series SN/RAM ® 6000 & RAM 9000 Software Manual - 111 -3.4.8 TCP Global SettingsClick on the TCP Global Settings menu item the following dialog window appears:[SYN] Tx Timeout (Required): Specifies the timeout value, in seconds, for SYN packets for connectiontracking. 65 is generally recommended default, which differs from the system default of 120. Therecommended tuning range is 30-120.Enter Timeout (Required): Specifies the amount of time, in seconds, that a TCP connection can remain in anidle state before sending Keep-Alive Probes to verify that the remote end of the socket is still available. Therecommended setting for this field is:10 - 30 for Ethernet connections where data usage is not an issue.60 - 300 for cellular connections where total data usage must be considered.Enter Maximum Probe Attempts (Required): Specifies the acceptable number of failed probes that will besent to the remote end of a TCP socket before determining the connection to be failed and disconnecting. Therecommended values are 3-6.Disable Path MTU Discovery: Enable/Disable Path MTU Discovery. This might be useful if a private cellularnetwork is restricting MTU sizes along the network path and causing packet drops. The recommended valuefor this field is No (off).Enable Reverse Path Filter: Select the desired Reverse Path Filter (rp_filter) from the drop down options.Reverse path filtering is a mechanism adopted by the Linux kernel, as well as most of the available networkingdevices to check whether a receiving packet source address is routable. When a device with reverse pathfiltering enabled receives a packet, the device will first check whether the source of the received packet isreachable through the interface it came in on.• If the received packet’s source address is routable through any of the interfaces on the device, thedevice will accept the packet.• If the received packet’s source address is not routable through any of the interfaces on the device, thedevice will drop that packet.