Update - remove/add values from "Data group list" via irule

Not possible to add or remove data list value from iRule.

to use tables, commands are:

table set  "variable" "value" 7200
table add  "variable" "value" 7200
set value [table lookup -notouch "variable"]

tables are shared between all irules and VS in the same appliance.

HI

you can use table to do it. if you want block source ip you can use this irule.

code 
irule_A_Virtaulserver_A
ltm rule /Common/irule_A_Virtaulserver_A {
when RULE_INIT {
    set ::whichone 0
    set static::maxRate 20;
    set static::timeout 60;
    set static::maxquery 11;
    }
when HTTP_REQUEST {
    set getCount [table lookup -notouch -subtable requests [IP::client_addr]]
    set srcip [IP::remote_addr]
    if { [table lookup -subtable "Redirectolist" $srcip] != "" } {
        HTTP::redirect "http://www.abc.com"
        return
    }
    set curtime [clock second]
    set key "count:$srcip:$curtime"
    set count [table incr $key]
    table lifetime $key 2
    if { $count > $static::maxquery } {
        table add -subtable "Redirectolist" $srcip "blocked" indef $static::timeout
        table delete $key
        return
    } 
}
}
====================================================================================================================
irule_B_Virtaulserver_B
ltm ifile /Common/Block_page_html {
    file-name /Common/Block_page_html
}
ltm ifile /Common/logo_jpg {
    file-name /Common/logo_jpg
}
ltm ifile /Common/styles_css {
    file-name /Common/styles_css
}

ltm rule
ltm rule /Common/irule_B_Virtaulserver_B {
when RULE_INIT {
    set static::timeout 60;
    set static::maxquery 11;
    }
when HTTP_REQUEST {
    set srcip [IP::remote_addr]
    if { [table lookup -subtable "Redirectolist" $srcip] != "" } {
        switch [HTTP::uri] {
            "/Block_page/logo.png" { HTTP::respond 200 content [ifile get "logo_jpg"] }
            "/Block_page/styles.css" { HTTP::respond 200 content [ifile get "styles_css"] }
            default { HTTP::respond 200 content [ifile get "Block_page_html"] }
            }
    }
    set curtime [clock second]
    set key "count:$srcip:$curtime"
    set count [table incr $key]
    table lifetime $key 2
    if { $count > $static::maxquery } {
        table set -subtable "Redirectolist" $srcip "blocked" indef $static::timeout
        table delete $key
        drop
        return
    }
}
}