GET /ImagesProvider.svc/ensureready HTTP/1.1\r\n
can you try this one?
GET /ImagesProvider.svc/ensureready HTTP/1.1\r\nHost: \r\nConnection: Close\r\n\r\n
sol2167: Constructing HTTP requests for use with the HTTP or HTTPS application health monitor
https://support.f5.com/kb/en-us/solutions/public/2000/100/sol2167.html
I added "200" to my Receive String and i can't see my pool as up although with SoapUI i do get 200 on the above Send String. I also tried "Ok" with no luck.
you may try tcpdump.
e.g.
tcpdump -nni 0.0:nnn -s0 -w /var/tmp/output.pcap host x.x.x.x and host y.y.y.y and port zzz -v
x.x.x.x is non-floating self ip on server vlan
y.y.y.y is server ip
zzz is server port