HTTP::header replace Host and HTTP:redirect

 

so if someone visit www.srwd18.com,client will go to www.google.com or where?

 

 

i think so - he would be redirected to google.com

 

 

 

how to turn off rule2,I only know return will jump out of the current event in single irule.

 

 

have u seen these?

 

 

Stacking iRules: A Modular Approach by Deb

 

http://devcentral.f5.com/Tutorials/TechTips/tabid/63/articleType/ArticleView/articleId/240/Stacking-iRules-A-Modular-Approach.aspx

 

 

iRules: Disabling Event Processing by Deb

 

http://devcentral.f5.com/Tutorials/TechTips/tabid/63/articleType/ArticleView/articleId/236/iRules-Disabling-Event-Processing.aspx

 

 

 

2:if I use HTTP::header replace Host "www.baidu.com" to rewrite the request

 

it seems this will not change the item in broswer,such as IE

 

 

yes

 

 

 

so bigip will visit www.baidu.com for client,right?like a proxy

 

 

no, i don't think so. what bigip does is to replace host header in request to "www.baidu.com".

 

 

 

there are 2 datacenter, same website ,if I want to forward traffic in site1 to site2 ,how to forward them?

 

The only way I can think about is HTTP::REDIRECT,but this will change the item/address in client's broswer

 

so it seems HTTP::header replace Host is a good choice,

 

 

can't it be done by gtm?

Hi,nitass

 

 

Thanks for your help

 

I have tried in my lab,

 

:if there are rule1 and rule2 under one VS,order is rule1 and rule2

 

rule1:

 

when HTTP:request {

 

if { [HTTP::host] euqals "www.srwd18.com"} {

 

HTTP::redirect "http://www.baidu.com"

 

}

 

}

 

 

rule2

 

when HTTP::request {

 

if {[HTTP::host] equals "www.srwd18.com"} {

 

HTTP::redirect "http://www.google.com"

 

}

 

}

 

 

so if someone visit www.srwd18.com,client will go to www.google.com or where?

 

 

------it can't show the page,I don't know why

 

2:

 

yes

 

 

 

 

so bigip will visit www.baidu.com for client,right?like a proxy

 

 

 

no, i don't think so. what bigip does is to replace host header in request to "www.baidu.com".

 

 

-----bigip worked as a full proxy server,so after it change replace host to "www.baidu.com",it will send request to "www.baidu.com",however rule below doesn't work

 

when HTTP::REQUEST {

 

if {[HTTP::host] equals "www.srwd18.com"}{

 

HTTP::header replace Host "www.baidu.com"

 

return}

 

}

 

 

3:

 

 

there are 2 datacenter, same website ,if I want to forward traffic in site1 to site2 ,how to forward them?

 

The only way I can think about is HTTP::REDIRECT,but this will change the item/address in client's broswer

 

so it seems HTTP::header replace Host is a good choice,

 

 

 

can't it be done by gtm?

 

-----some downstream dns server ignore the TTL set in GTM.so they cache the record more than TTL ,maybe 24 hours,

 

that is why I try to achieve via redirect or forward

 

Do u have some method to achieve this

so if someone visit www.srwd18.com,client will go to www.google.com or where?

 

------it can't show the page,I don't know why

 

 

sorry i'm wrong. both events are triggered but user gets the first redirection since multiple redirections aren't supported.

 

 

[root@tulip:Active] config b virtual bar list

 

virtual bar {

 

pool foo

 

destination 172.28.17.66:http

 

ip protocol tcp

 

rules

 

rule1

 

rule2

 

profiles

 

http

 

tcp

 

}

 

[root@tulip:Active] config b rule rule1 list

 

rule rule1 {

 

when HTTP_REQUEST {

 

log local0.info "rule1"

 

if {[HTTP::host] equals "www.srwd18.com"} {

 

HTTP::redirect "http://www.baidu.com"

 

}

 

}

 

}

 

[root@tulip:Active] config b rule rule2 list

 

rule rule2 {

 

when HTTP_REQUEST {

 

log local0.info "rule2"

 

if {[HTTP::host] equals "www.srwd18.com"} {

 

HTTP::redirect "http://www.google.com"

 

}

 

}

 

}

 

[root@tulip:Active] config curl -i http://www.srwd18.com/

 

HTTP/1.0 302 Found

 

Location: http://www.baidu.com

 

Server: BigIP

 

Connection: Keep-Alive

 

Content-Length: 0

 

 

[root@tulip:Active] config tail -f /var/log/ltm

 

Aug 7 05:27:47 tmm tmm[1843]: Rule rule1 : rule1

 

Aug 7 05:27:47 tmm tmm[1843]: Rule rule2 : rule2

 

Aug 7 05:27:47 tmm tmm[1843]: 01220001:3: TCL error: rule2 - Operation not supported. Multiple redirect/respond invocations not allowed (line 3) invoked from within "HTTP::redirect "http://www.google.com" "

Hi,

 

yes,it is not supported,

 

so how to make irule below work

 

when HTTP::REQUEST {

 

if {[HTTP::host] equals "www.srwd18.com"}{

 

HTTP::header replace Host "www.baidu.com"

 

return}

 

}

 

 

 

or how to reslove

 

 

there are 2 datacenter, same website ,if I want to forward traffic in site1 to site2 ,how to forward them?

 

The only way I can think about is HTTP::REDIRECT,but this will change the item/address in client's broswer

 

so it seems HTTP::header replace Host is a good choice,

 

 

 

can't it be done by gtm?

 

-----some downstream dns server ignore the TTL set in GTM.so they cache the record more than TTL ,maybe 24 hours,

 

that is why I try to achieve via redirect or forward

 

Do u have some method to achieve this

 

 

can u try to add pool or node command in the irule to send traffic to another site?

[root@tulip:Active] config b virtual bar list

 

virtual bar {

 

destination 172.28.17.66:http

 

ip protocol tcp

 

rules rule1

 

profiles

 

http

 

tcp

 

}

 

[root@tulip:Active] config b rule rule1 list

 

rule rule1 {

 

when HTTP_REQUEST {

 

log local0.info "rule1"

 

if {[HTTP::host] equals "www.srwd18.com"} {

 

snat automap

 

node 220.181.111.147 80

 

HTTP::header replace Host "www.baidu.com"

 

}

 

}

 

}

 

 

[root@tulip:Active] config curl -IL http://www.srwd18.com/

 

HTTP/1.1 200 OK

 

Date: Sun, 07 Aug 2011 16:31:46 GMT

 

Server: BWS/1.0

 

Content-Length: 7410

 

Content-Type: text/html;charset=gb2312

 

Cache-Control: private

 

Expires: Sun, 07 Aug 2011 16:31:46 GMT

 

Set-Cookie: BAIDUID=63CB57D21D237F0DF3EB449022233FC0:FG=1; expires=Sun, 07-Aug-41 16:31:46 GMT; path=/; domain=.baidu.com

 

P3P: CP=" OTI DSP COR IVA OUR IND COM "

 

Connection: Keep-Alive

 

 

New TCP connection 8: 172.28.17.60(33128) <-> 172.28.17.66(80)

 

1312733826.7271 (0.0001) C>S

 

---------------------------------------------------------------

 

HEAD / HTTP/1.1

 

User-Agent: curl/7.15.3 (i686-redhat-linux-gnu) libcurl/7.15.3 OpenSSL/0.9.7l zlib/1.1.4

 

Host: www.srwd18.com

 

Accept: */*

 

 

New TCP connection 9: 172.28.17.60(33128) <-> 220.181.111.147(80)

 

1312733826.7283 (0.0011) C>S

 

---------------------------------------------------------------

 

HEAD / HTTP/1.1

 

User-Agent: curl/7.15.3 (i686-redhat-linux-gnu) libcurl/7.15.3 OpenSSL/0.9.7l zlib/1.1.4

 

Host: www.baidu.com

 

Accept: */*

 

 

---------------------------------------------------------------

 

1312733827.0685 (0.3401) S>C

 

---------------------------------------------------------------

 

HTTP/1.1 200 OK

 

Date: Sun, 07 Aug 2011 16:31:46 GMT

 

Server: BWS/1.0

 

Content-Length: 7410

 

Content-Type: text/html;charset=gb2312

 

Cache-Control: private

 

Expires: Sun, 07 Aug 2011 16:31:46 GMT

 

Set-Cookie: BAIDUID=63CB57D21D237F0DF3EB449022233FC0:FG=1; expires=Sun, 07-Aug-41 16:31:46 GMT; path=/; domain=.baidu.com

 

P3P: CP=" OTI DSP COR IVA OUR IND COM "

 

Connection: Keep-Alive

Hi,

 

 

[root@tulip:Active] config b rule rule1 list

 

rule rule1 {

 

when HTTP_REQUEST {

 

log local0.info "rule1"

 

if {[HTTP::host] equals "www.srwd18.com"} {

 

snat automap

 

node 220.181.111.147 80

 

HTTP::header replace Host "www.baidu.com"

 

}

 

}

 

}

 

--but pool is in another datacenter,how can I add them in this datacenter?

 

Also,there are so many pools under this VS and need to forward to site2 and let site2's irule process the traffic.

 

Can I use VIP in this position?

 

you use GTM to work around this before?

 

--but pool is in another datacenter,how can I add them in this datacenter?

 

Also,there are so many pools under this VS and need to forward to site2 and let site2's irule process the traffic.

 

Can I use VIP in this position?

 

 

for my testing, 220.181.111.147 is vip on another site e.g. site2.

 

 

you use GTM to work around this before?

 

i don't know much about gtm. anyway, i understand gtm can decide should cilent connect to vip on site1 or site2.

OK,nitass,I will try this now

 

Can u give me the process how bigip handle this? HTTP::header replace Host "www.baidu.com"

 

it seems there is no http 302 or something like this

 

 

btw:GTM can decide client go to site1 or site2

 

However some downstream ignore the TTL set in gtm,so they will keep the old value of DNS record

 

So they will still go to site1

 

and there are 2 FTP VS,how to redirect them?