Append to list stored in table key

Yes, you store for each session all IP addresses. but you won't be able to list all sessions stored. you may know the session ID to read list of IPs.

The best solution to keep informations readable and manageable is:

• create one subtable for each session
  • create one key per IP address with value containing hit count
  • force keys timeout (even if you force timeout to 1 week)
• create one subtable sessions
  • one key per session

the irule can be:

when HTTP_REQUEST {
     set s_id [HTTP::cookie value $my_cookie]
      New session ID
     if { [table lookup -subtable $session $s_id] eq "" } {
        table add -subtable $session $s_id 1 $timeout
        table add -subtable $s_id [IP::client_addr] 1 $timeout
         Existing session ID / New IP
     } elseif { [table lookup -subtable $s_id [IP::client_addr]] eq "" } {
        table add -subtable $s_id [IP::client_addr] 1 $timeout
         Existing session ID Existing IP
     } else { table incr -subtable $s_id [IP::client_addr] $timeout}
 }