Forum Discussion
Phillip_Ulberg_
Nimbostratus
Nimbostratusload balance MSRDP traffic
I just need a basic iRule to dirct incoming requests from 3 vip's to 2 pools. I've done this before with HTTP traffic but not rdp, I'm hoping to re-use an existing iRule, modified of course for MSRDP traffic -
when HTTP_REQUEST {
Check requested host header (set to lowercase)
switch [string tolower [HTTP::host]] {
"VIP1" {
pool TS_2008_Test_Pool
}
"VIP2" {
pool Pool_Review
}
"VIP3" {
pool Pool_Review
}
}
}
TIA,
Phillip
21 Replies
- The_BhattmanIf you are using RDP then I believe you can replace HTTP_REQUEST with CLIENT_ACCEPTED.
However, are the 3 virtual address the same address on different ports?
CB 
hoolioCirrostratus
Hi Phillip,
I don't believe there is a concept of hostname in RDP. This doc from MS (Click here section 2.2 Message Syntax) seems to support that.
I think the client just resolves the hostname to an IP address and tries to establish a TCP connection with that IP address.
Aaron
Phillip_Ulberg_@CB - Yes, I am looking for the correct "CLIENT_ACCEPTED" syntax, the 3 vips internally have 3 unique IP's but all respond on port 3389.- The_BhattmanWhat is the condition to which pool it will choose?
CB - Phillip_Ulberg_The condition would be the vip the client enters to initiate their RDP session.
- The_BhattmanIf you have 3 VIPS then I am assuming you mean each vip connection will either go to pool 1 or 2, where Pool 1 and 2 are the same pools in each seperate VIP, correct? If that is the case then you will need something to tell you which pool (pool1 or 2) to choose from.
CB - Phillip_Ulberg_When the client brings up mstsc.exe they will enter "new.vip.com", or "old.vip.com", or "reallyold.vip.com". new.vip.com needs to route to Pool1, old.vip.com and reallyold.vip.com need to route to Pool2.
- The_BhattmanAs Aaron had stated RDP doesn't insert hostnames in any of it's headers - just Ip address. So what you are asking is from I can tell not possible.
CB - hoolioIf new.vip.com, old.vip.com and reallyold.vip.com each resolve to unique IP addresses, you could configure whichever pool you want on each virtual server. But like CB said, I don't think it's possible to determine which hostname the client used to resolve to the virtual server IP address.
Aaron - Phillip_Ulberg_How about something like this -
when CLIENT_ACCEPTED {
TCP::collect 25
}
when CLIENT_DATA {
if { [TCP::payload 25] contains "legacy" } {
pool Pool_Review
} else {
pool TS_2008_Test_Pool
}
TCP::release
}
