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Community Member

ACE-4710 URL Rewrite

Hi - I need to rewrite a request and a response using the ACE-4710 appliance.  There are multiple ports within the server farm that will be used.

The request will come in as http://erptest.abc.com and will need rewritten to http://erptest.abc.com/def/html.

The native response will have the server farm ports included and they will need masked back to the original request.  The response will look like:

http://erptest.abc.com:8080/def/html and will need masked and rewritten back to http://erptest.abc.com.

I haven't found much to help.  Any help will be appreciated.  Thanks.

11 REPLIES
Cisco Employee

ACE-4710 URL Rewrite

Hi,

You will need to define an action list and rewrite both request and response host header. A similar example where only request is rewritten is shown in below discussion.

https://supportforums.cisco.com/thread/133427

I haven't configured this myself but it should work fine.

Let me know if you have any questions.

Regards,

Kanwal

Community Member

ACE-4710 URL Rewrite

Thanks for your response.  I currently have it configured as such but with no luck:

action-list type modify http REWRITE

  header rewrite request host header-value "erptest[.]abc[.]com" replace "erptest.abc.com/def/html"

  header rewrite response location header-value "erptest[.]abc[.]com:(.*)" replace "erptest.abc.com"

policy-map type loadbalance first-match HTTP

  class class-default

    sticky-serverfarm GROUP9TEST

    action REWRITE

policy-map multi-match L4_VIP_POLICY

  class VIP

    loadbalance vip inservice

    loadbalance policy HTTP

    loadbalance vip icmp-reply active

Any ideas?  Thanks again.

Cisco Employee

ACE-4710 URL Rewrite

Hi,

Which version of code are you running? Can you put in the complete configuration here? Have you defined a L7 class map?

Regards,

Kanwal

Community Member

ACE-4710 URL Rewrite

Thank you. I have the policy-maps defined.  There is also the requirement to alternate between port 8091 and 8092 in the serverfarm. 

action-list type modify http TEST_REWRITE

  header rewrite request host header-value "erptest[.]eqt[.]com" replace "erptest.eqt.com:8091/jde/owhtml"

  header rewrite response host header-value "erptest[.]eqt[.]com(.*)" replace "erptest.eqt.com%1"

serverfarm host TEST_SF

  failaction purge

  predictor leastconns

  probe TCP8091

  probe TCP8092

  rserver WEBW01 8091

    weight 1

    inservice

  rserver WEBW01 8092

    weight 1

    inservice

  rserver WEBW02 8091

    weight 1

    inservice

  rserver WEBW02 8092

    weight 1

    inservice

sticky http-cookie TEST GROUP9TEST

  cookie insert

  replicate sticky

  serverfarm TEST_SF

class-map match-any TEST_VIP

  2 match virtual-address 10.2.23.26 tcp eq www

  4 match virtual-address 10.2.23.26 tcp eq 8092

  5 match virtual-address 10.2.23.26 tcp eq 8091

policy-map type loadbalance first-match TEST_HTTP

  class class-default

    sticky-serverfarm GROUP9TEST

    action TEST_REWRITE

policy-map multi-match L4_VIP_POLICY

  class TEST_VIP

    loadbalance vip inservice

    loadbalance policy TEST_HTTP

    loadbalance vip icmp-reply active

Community Member

ACE-4710 URL Rewrite

Thank you.  I'm running Version A3(2.5)

Cisco Employee

ACE-4710 URL Rewrite

Hi,

Hi,

Sorry for delay in response. Haven't had the chance to look at it. Can you do this and try again.

class-map match-any TEST_VIP

2 match virtual-address 10.2.23.26 tcp eq www

4 match virtual-address 10.2.23.26 tcp eq 8092

5 match virtual-address 10.2.23.26 tcp eq 8091

class-map type http loadbalance match-all TEST_URL1

2 match http header Host header-value "erptest.eqt.*"

policy-map type loadbalance first-match TEST_HTTP

class TEST_URL1

sticky-serverfarm GROUP9TEST

action TEST_REWRITE

policy-map multi-match L4_VIP_POLICY

class TEST_VIP

loadbalance vip inservice

loadbalance policy TEST_HTTP

loadbalance vip icmp-reply active

Let me know how it goes.

Regards,

Kanwal

Community Member

ACE-4710 URL Rewrite

Thank you -  I still get the 400 returned from the server as a malformed request. 

Interestingly the server is performing a 301 on the /jde/owhtml.  The dev environment does not have the rewrite configured.  If I hit erptest.eqt.com/jde/owhtml it is redirected on the server to erptest.eqt.com:8091/jde/xxxx.

Cisco Employee

ACE-4710 URL Rewrite

Hi,

But you come with erptest.eqt.com and that should match the condition and ACE should rewrite the request as specified. Do you see that ACE is not rewriting the request at all? Can  you do a capture?

I am not entirely sure though that we can rewrite path in the version you are running. We can in A5 version so you can test it. If you think ACE is just modifying the HOST part  and not path then it may be a limitation in your version.

Regards,

Kanwal

Community Member

ACE-4710 URL Rewrite

Thanks - I agree that should be enough.  However, I was able to get the request working using a redirect.  That still leaves me with a response rewrite to mask the port on the way back to the client.  Are you aware of any way to do a combination of a redirect and a rewrite?

The capture from the client side only showed the server refusing the connection (400 error) due to a malformed request which looked perfectly fine from my side. Maybe it is a code issue...

Thank you again.

Cisco Employee

ACE-4710 URL Rewrite

Hi,

If it is a server who is issuing a redirect we can rewrite the "Location header" but if it  is ACE which is redirecting then you can make ACE to redirect it to whatever you want.

Regards,

Kanwal

Community Member

ACE-4710 URL Rewrite

Thanks - The ACE is performing the redirect to port 8091 but port 8091 must be hidden in the response from the server to the client.  Is that possible?  I currently have a response rewrite nested with the redirect class-map but with no luck on the response rewrite.  The 8091 is still visible.

action-list type modify http JDE9_TEST_REWRITE

  header rewrite response host header-value "erptest.eqt.com:8091(.*)" replace "erptest.eqt.com%1"

policy-map type loadbalance first-match JDE9_TEST_PM

  class JDE9_TEST_REDIRECT_CM

    serverfarm JDE9_TEST_REDIRECT_SF

    action JDE9_TEST_REWRITE

  class class-default

    sticky-serverfarm GROUP9TEST

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