Forum Discussion
SV2022
Cirrus
Cirrushealth monitor without hostname
hi guys,
i have a health monitor without hostname
GET /icap/AV HTTP/1.1\r\nConnection: Close\r\n\r\n
we have 2 backend nodes .
Just wnat to know what will be the hostname when traffic is sent to backend servers.
will this add original FQDN from client traffic or it adds server IP address .etc
- zamroni777
Nacreous
the Host header will contain ip addres of the pool member.
boneyardMVP
you say "what will be the hostname when traffic is sent to backend servers?".
do you mean the traffic from the health monitor to the backend server?
it won't contain a hostname in that traffic, you didn't provide one in the Send String so the BIG-IP won't make on up.
this is quite easy to check if you have just one health monitor and no live traffic yet, run tcpdump on the BIG-IP and use something like this:
tcpdump -i 0.0 -nn host <backend server IP> -c 10 -X
you will see the Send String somewhere without any Host: header.
SV2022lets say the pool member is configured with service "any" and VS is listening on 443 .
what will be destination port of server side traffic from F5..Source ip will be F5(auromap/snat) destiantion is pool member but what will be the dst port number
- Paulius
As FerCamargo stated, it will send the IP of the pool member it is sending the health monitor to. Please keep in mind that some servers tend to use strict RFC following and that IP is auto filled and the server could drop the request, not respond, or respond with a 400 series response. If you're going to use HTTP 1.1 you really should be adding a host field.
- FerCamargo
Employee
the monitor will use the IP
when the traffic came from your client the arrived with the URI requested
- SV2022
Destination ip will be server,but what about hostname in the packet.will there be any value ?
