Forum Discussion
Qasim
Cirrostratus
CirrostratusWhat LTM do to HTTP Header?
Hi, I need to read up on LTMs as its a basic theory question but wondering if you can help me in the meanwhile: my understanding is that LTM receives traffic on a particular VIP, replaces the he...
It's not something that can be turned on with a check box, you need to either:
- Use and iRule (one above is not re-writing the Host)
- Use a Local Traffic Policy
- Use an HTTP profile to erase a header
Are you sure F5 is rewriting the Host? Can you share you VS config?
QasimCirrostratus
CirrostratusThank Lee once again.
if I was to enable the re-write, what would I need to do? is it like a checkbox somewhere? wondering if this has been enabled for a service I am t-shooting right now.
the current IRULE only redirects so can't be the irule:
when HTTP_REQUEST {
switch -glob [HTTP::host] {
uat-services-hccf.abc.co.uk { pool EXT_UAT_abc_443_POOL }
thanks.
Lee_Sutcliffe
Nacreous
NacreousIt's not something that can be turned on with a check box, you need to either:
- Use and iRule (one above is not re-writing the Host)
- Use a Local Traffic Policy
- Use an HTTP profile to erase a header
Are you sure F5 is rewriting the Host? Can you share you VS config?
- Qasim
I am not sure as I don;t have access to the logs but was just wondering whether that the case and if I can confirm it from the config.
SO it won't replace the header even if offload SSL
- Lee_Sutcliffe
As I've mentioned previously, the three places you could have header re-writes are mentioned above.
Take a look at all iRules on the VS, the HTTP profile and if you have any traffic policies assigned. F5 won't log that it is re-writing the header unless you tell it to.
Remember, F5 is a simple TCP proxy, what comes in one end is sent out the other on a new connection. So unless you have configured something, it will not change anything in the payload