What should my UDP session timeout be?
UDP sessions are typically given shorter timeout intervals on firewalls. The default for most is 30 seconds, which is too aggressive for an application like SIP. Increase UDP timeouts to a minimum of 90 seconds, however our recommendation would be 300 seconds or longer.
How do I change my UDP timeout?
Resolution for SonicOS 6.5
- Click Manage button in the top navigation menu.
- Navigate to the Firewall Settings | Flood Protection.
- Click on UDP tab.
- Under the UDP settings.
- Modify the default UDP connection timeout, to the desired value.
- Click Accept button to save the changes.
What is NAT timeout?
NAT session timeout is the length of time that the router will keep that connection even if it’s inactive. After that, the router will remove the entry, and stop accepting the incoming traffic.
What is default TCP session timeout?
The Idle Timeout setting in the TCP profile specifies the length of time that a connection is idle before the connection is eligible for deletion. If no traffic flow is detected within the idle session timeout, the BIG-IP system can delete the session. The default is 300 seconds. The default is 1800 seconds.
Does UDP have keep-alive?
Since UDP state usually expires after short periods of time in the range of tens of seconds to a few minutes, and the UDP port is closed in the process, UDP hole punching employs the transmission of periodic keep-alive packets, each renewing the life-time counters in the UDP state machine of the NAT.
Should I enable strict UDP session control?
Beware, strict UDP session control breaks things that predate NAT and so expect to advertise UDP ports and anybody can immediately talk to it.
Does NAT expire?
NAT keepalive is a feature that sends very tiny data packets, called UDP packets, from a VoIP phone to the router to show that the port is still in use. However, most NAT tables expire within 60 seconds, so NAT keepalive allows phone ports to remain open by sending a UDP packet every 25-50 seconds.
Does UDP work over NAT?
UDP hole punching will not work with symmetric NAT devices (also known as bi-directional NAT) which tend to be found in large corporate networks. After that the NAT device has a record of having sent a packet to the other machine, and will let any packets coming from this IP address and port number through.
How long is the UDP session connect timeout?
UDP session connect timeout: 9 seconds. UDP session deliver timeout: 15 seconds. Router(config)#. If the SIP phones have a keep-alive time which is larger than the UDP session connect timeout value on the USG, the call between USG devices will be disconnected.
What are good timeout and retry values for UDP?
Ideally the implementation of the protocol handling should be advanced to automatically derive the optimum timeout and retry periods. When there is no data loss you do not need redundant delivery, when there is data loss you need to increase delivery.
How to increase connection timeout for specific connections?
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Where do I change the session timeout value?
From the web UI, go to Device >Setup > Sessions > Session Timeouts. From the CLI, the timeout value can be changed with the following command which is not persistent with restart of the device: