F5 cookie passive method

Question

Hello, I am learning about F5 cookie persistence, and I have searched through many of posts.&nbsp;I curious that when we use cookie passive method, how can F5 know that which client belongs to which servers. Where does F5 store the information, i have try to look at persistence record in GUI as statistics&nbsp;&nbsp;››&nbsp;&nbsp;Module Statistics&nbsp;:&nbsp;Local Traffic &nbsp;››&nbsp;&nbsp;Persistence Records. But not found anything.&nbsp;

whisperer · Answer

You will not find anything. F5 doesnt care... since passive mode is where the server and client interact with cookies and the normal timeout/expiration is evaluated by the server when a cookie is presented back on subsequent connections.

HTTP Cookie PassiveUsing the HTTP Cookie Passive method is unlike the other cookie persistence methods. The BIG-IP system does not insert or search for blank&nbsp;Set-Cookie headers in the response from the server. This method does not try to set up the cookie. With this method, the server provides the cookie, formatted with the correct server information and timeout.

whisperer · Answer

Think you are missing the point of a passive cookie:
&nbsp;

In Passive mode the Big-IP does not search or insert cookies into the HTTP header of responses from the server

c_fletcher · Answer

Are you looking for the current connection table on your LTM? You can see this using the tmsh shell. The command "show sys connection"

dissapat · Answer

I am looking for a cookie information, that where F5 store information about what cookie belong to which server.&nbsp;

dissapat · Answer

Can we check that where F5 collect the information of cookie?

Forum Discussion

SSO Login Update Coming to DevCentral

Kevin - June 2026 Featured F5er

Tyler - May 2026 Featured Member

Recent Discussions

ASM attack signatures not syncing between active and standby F5

Hardware BIG-IP appliance reach EOSS, but the software version running on it not yet?

VPN Communication Error with F5 BIG-IP Edge Client

simultaneous disabling / enabling of all LTM objects

Query on source IP preservation for syslog traffic through F5 virtual server

Related Content

Cookie passive persistence

Especial Load Balancing Active-Passive Scenario (I)

Cookie-based DDoS protection

Especial Load Balancing Active-Passive Scenario (II)

2. SYN Cookie: Operation

ABOUT DEVCENTRAL

RESOURCES

SUPPORT

PARTNERS