- Navigate to Configuration > System > Advanced IP Configuration.
- In the Global Settings pane, click the edit icon.
- Update the following settings, and then click Save:
Setting Description IP Reassembly Timer (Seconds) Enter the number of seconds before the server discards an incomplete IP datagram. The default is 5.
Ignore ICMP Echo Requests Set the toggle switch to Disabled or Enabled. When enabled, this option instructs the system not to respond to Internet Control Message Protocol (ICMP) echo requests. The default is Disabled.
Ignore ICMP Redirects Set the toggle switch to Disabled or Enabled. When enabled, this option instructs the system to ignore ICMP redirects. The default is Disabled.
TCP Keep Alive Set the toggle switch to Disabled or Enabled. When enabled, this option instructs the system to send a keepalive packet when it has received no data or acknowledgment packets for a connection within the specified timeout period. TCP Keep Alive Timeout (Seconds) Enter the number of seconds to keep a connection alive. The default is 7200.
TCP MTU Enter the size of the maximum transmission unit (MTU) in use for TCP packets when transmitting to a locally configured subnet. The valid range is 68 to 9600 bytes. For IPv6 traffic, this value must be 1280 or greater.
The default is 1500.
Other Protocol MTU (Bytes) Enter the size of the MTU for protocols other than TCP when transmitting to a locally configured subnet. The valid range is 68 to 9600 bytes. For IPv6 traffic, this value must be 1280 or greater.
The default is 1500.
ARP Cache Timeout (Seconds) Enter the number of seconds before the server removes an unused ARP entry from the caching table. The default is 60.
IP MTU for Off-Subnet Transmits (Bytes) Enter the maximum IP packet size in use when transmitting to a different subnet. The valid range is 68 to 9600 bytes. For IPv6 traffic, this value must be 1280 or greater.
The default is 1500.