Configuring the IPsec session idle timeout (2024)

FAQs

What is the default timeout for IPsec session? ›

ipsec session idle-time seconds

Optional. 300 seconds by default.

The default is 30 minutes. If there is no communication activity on the connection in this period, the security appliance terminates the connection.

The idletimeout parameter specifies the period of time, in milliseconds, that a connection is allowed to remain idle.

Default ike lifetime is 28800 seconds. Default ipsec lifetime is 3600 seconds. Keys are renegociated because they can be bruteforced, and then an attacker could decrypt all the captured traffic.

Typical session timeouts are 15- to 45-minute durations depending on the sensitivity of the data that may be exposed.

Idle timeout is the maximum length of time that a TCP connection can stay active when no traffic is sent through the connection. The default global idle timeout for all traffic is 3600 seconds (1 hour).

vpn-idle-timeout - Time in minutes that a VPN connection can be idle (no traffic) before it is terminated. vpn-session-timeout - Maximum time in minutes that a VPN connection can be established before it is terminated, doesn't matter if there is traffic or not.

In the navigation pane, choose Client VPN endpoints. Select the Client VPN endpoint that you want to modify, choose Actions, and then choose Modify Client VPN Endpoint. For Session timeout hours, choose the desired maximum VPN session duration time in hours. Choose Modify Client VPN endpoint.

Idle Timeout: The idle-timeout is period of time in seconds that the SSL VPN will wait before timing out. Auth-Timeout : The auth-timeout is period of time in seconds that the SSL VPN will wait before re-authentication is enforced.

The idle timeout limits the chances that an attacker has to guess and use a valid session ID from another user, and under certain circ*mstances could protect public computers from session reuse.

How do I get rid of idle timeout? ›

The idle timeout can be discovered by creating a persistent connection, then letting it time out and measuring the time. There will be a few milliseconds of noise in the results due to network delays, though. In general, the actual values most sites use will be some even number of seconds.

Per CNSSP 15, as of June 2020, minimum recommended settings for ISAKMP/IKE are Diffie-Hellman group 16, AES-256 encryption, and SHA-384 hash, while those for IPsec are AES-256 encryption, SHA-384 hash, and CBC block cipher mode.

IPSec is a set of communication rules or protocols for setting up secure connections over a network. Internet Protocol (IP) is the common standard that determines how data travels over the internet. IPSec adds encryption and authentication to make the protocol more secure.

The IPsec AH tunnel mode sets up a secure connection between two communication endpoints on the internet. This is the most common mode to use when connecting to a VPN server.

Valid values are between 60 sec and 86400 sec (1 day). The default value is 3600 seconds.

The default is 86,400 seconds or 24 hours. As a general rule, a shorter lifetime provides more secure ISAKMP negotiations (up to a point). However, with shorter lifetimes, the ASA sets up future IPsec SAs more quickly. Specifies the hash algorithm used to ensure data integrity.