iRule, Traffic Policy or Re-Write Policy

Question

&nbsp;Hi,I have created an iRule that maps source addresses to a particular poolwhen CLIENT_ACCEPTED {if {[class match [IP::client_addr] equals clients1] } {&nbsp; &nbsp; &nbsp;pool POOL_1&nbsp; &nbsp;} elseif {[class match [IP::client_addr] equals clients2] } {&nbsp; &nbsp; &nbsp;pool POOL_2&nbsp; &nbsp;} elseif {[class match [IP::client_addr] equals clients3] } {&nbsp; &nbsp; &nbsp;pool POOL_3&nbsp; &nbsp;} elseif {[class match [IP::client_addr] equals clients4] } {&nbsp; &nbsp; &nbsp;pool POOL_4&nbsp; &nbsp;} elseif {[class match [IP::client_addr] equals clients5] } {&nbsp; &nbsp; &nbsp;pool POOL_5&nbsp; &nbsp;}&nbsp; &nbsp;else {&nbsp; &nbsp; &nbsp; pool POOL_6&nbsp; &nbsp; &nbsp;}}I have a re-write policy that changes the urihttps://example.com to https://examples.com/test&nbsp;When the connection completes to the backend servers, they respond with their hostname in the browser.&nbsp;I want to keep https://example.com on the client side but I'm not sure how to achieve this. I thought I could do a response within my re-write policy but this fails.I then looked at traffic policies but already have an ASM policy attached&nbsp;Should I try and achieve everything under one irule (if so how, might I do this)It replaces the original uri with a new uri (going to the server)Have my current source to pool mappingReplace the server hostname with the original uri https://example.comThanks for any pointers

injeyan_kostas · Answer

Hi sjy2025​&nbsp;the best solution would be to config application use relative pathsfor now you can try this irule, you will need to apply stream profile alsowhen CLIENT_ACCEPTED 
{
    STREAM::disable
    if {[class match [IP::client_addr] equals clients1] } 
    {
        pool POOL_1
    } 
    elseif {[class match [IP::client_addr] equals clients2] } 
    {
        pool POOL_2
    } elseif {[class match [IP::client_addr] equals clients3] }
    {
        pool POOL_3
    } elseif {[class match [IP::client_addr] equals clients4] } 
    {
        pool POOL_4
    } elseif {[class match [IP::client_addr] equals clients5] } 
    {
        pool POOL_5
    }
    else {
        pool POOL_6
    }
}

when HTTP_REQUEST 
{
    STREAM::disable
    HTTP::header remove "Accept-Encoding"
    set original_uri [HTTP::uri]
    HTTP::uri "/test${original_uri}"
}

when HTTP_RESPONSE 
{
    STREAM::disable
    if {[HTTP::header exists "Location"]} 
    {
        set loc [HTTP::header "Location"]
        if {[string match "https://examples.com*" $loc]} 
        {
            HTTP::header replace "Location" [string map {"https://examples.com" "https://example.com"} $loc]
        }
    }
    if {[HTTP::header "Content-Type"] contains "text"} 
    {
        STREAM::expression {@https://examples.com@https://example.com@}
        STREAM::enable
    }
}&nbsp;

sjy2025 · Answer

Thank you for the irule. I've only just been able to get back to this project due to other work.&nbsp;&nbsp;when HTTP_REQUEST{&nbsp; &nbsp; STREAM::disable&nbsp; &nbsp; HTTP::header remove "Accept-Encoding"&nbsp;&nbsp; &nbsp; set original_uri [HTTP::uri]&nbsp; &nbsp; HTTP::uri "/test${original_uri}"}&nbsp;Apologises for my understanding of this but my iRules knowledge is basic&nbsp;So when there is an HTTP request&nbsp;set original_uri [HTTP::uri]&nbsp; &nbsp;&gt;&gt;&nbsp; set the original_uri means keep the original uri and store it as a variable? This would be &nbsp;https://example.comHTTP::uri "/test${original_uri}" } &gt;&gt; this is the replacement, so the $ gets the variable and appends the test to it https://example.com/test&nbsp;Is it possible to make the following happen?https://example.com&nbsp;to&nbsp;https://different.name.com:666&nbsp;{&nbsp; &nbsp; STREAM::disable&nbsp; &nbsp; HTTP::header remove "Accept-Encoding"&nbsp;&nbsp; &nbsp; set original_uri [HTTP::uri]&nbsp; &nbsp; HTTP::uri "https://different.name.com:666"}&nbsp;Within the response, do I just substitute in as followswhen HTTP_RESPONSE{if {[string match "https://different.name.com:666*" $loc]}HTTP::header replace "Location" [string map {"https://different.name.com:666" "https://example.com"} $loc]&nbsp;Would the stream profile be like this?&nbsp;&nbsp; Thanks

injeyan_kostas · Answer

Hi&nbsp;sjy2025​&nbsp;So when there is an HTTP request&nbsp;set original_uri [HTTP::uri]&nbsp; &nbsp;&gt;&gt;&nbsp; set the original_uri means keep the original uri and store it as a variable? This would be &nbsp;https://example.comHTTP::uri "/test${original_uri}" } &gt;&gt; this is the replacement, so the $ gets the variable and appends the test to it&nbsp;https://example.com/testthat's correct&nbsp;Is it possible to make the following happen?https://example.com&nbsp;to&nbsp;https://different.name.com:666in this case, different.name.com is the host not the uri&nbsp;if understand correct you want client request https://example.com but you send to the server https://different.name.com:666Fisrtly you have to define the port in pool itslelf, so just create a pool with the ip of the server and port 666. Suppose you name the pool 666_poolthen you can use below irule as an examplewhen HTTP_REQUEST
{
	if { ([string tolower [HTTP::host]] equals "example.com") }
	{
		HTTP::header replace Host "different.name.com"
		pool 666_pool
	}
}&nbsp;

sjy2025 · Answer

Thats correct, a single uri to servers on different subnets&nbsp;I have a number of pools, each has a specfic node in it, listening on a port - 666Each pool has a remote test client that connects to the pool&nbsp;I'd like all test clients to hit the same uri of&nbsp;https://example.com then be redirected to a specific server (based on their source IP)client 1 uses 192.168.1.1&nbsp; &nbsp; goes to pool A and https://example.com redirects to&nbsp;hostnameA.test.com:666client 2 uses 192.16821&nbsp; &nbsp;goes to pool B and https://example.com redirects to hostnameB.test.com:666client 3 uses 192.16821&nbsp; &nbsp;goes to pool C and https://example.com redirects to hostnameC.test.com:666&nbsp;I want the node name to remain hidden from client, currently I see the server name in the response, I just want the client to only ever see&nbsp;https://example.com if possibleThanks again

injeyan_kostas · Answer

it's not clear to me yetIs the pool B server (for example) responds with a redirect or you mean that you need a host header rewrite because server listens only to hostnameB.test.com?