Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

ashokp1's avatar
ashokp1
Icon for Altostratus rankAltostratus
Aug 11, 2025

Best approach to serve maintenance page

Hi, We need to put website under maintenance for about 6 hours.   Traffic flow: Clients -->Akamai--->F5-->Backend servers.   We have maintenance page hosted in AWS cloud Front.   which approach...
irule
LTM
maintanance page
Aswin_mk's avatar
Aswin_mk
Icon for MVP rankMVP
Aug 15, 2025

Hello ashokp1​ 

 

You can use the BIG-IP system to respond (with a maintenance page) if the virtual server resources (pool or pool members) are unavailable.

When the BIG-IP system receives a request for a virtual server that does not have available resources (for example, the pool is marked down with no available pool members) you can configure an iRule to send an HTTP response, such as a maintenance page, to the client. To do so, perform the following procedure:

Use an iRule to display a maintenance page when the pool is down 

BR
Aswin

  • ashokp1's avatar
    ashokp1
    Icon for Altostratus rankAltostratus
    Sep 15, 2025


    Thanks for your response. I’ve gone through the document and it looks that the status code returned is 200. Will this response be cached by the browser or by any edge router/CDN, which can cause the "maintenance" message to persist even after the site comes back up.

     HTTP::respond 200 content