This topic we would lile to provide information and step how to setup F5 iRules

that check source client ip and translate client ip addtess before send traffic to servers

Diagram

In this diagram above, We have client IP a.a.a.a, b.b.b.b and c.c.c.c send traffic to virtual server on F5, We would like to create iRules that match condition source IP address and translate IP before send traffic to servers, We using to function on F5, First iRules and second is source nat pool, We recommend source nat pool becuase it can scale IP address in the features

Step1: Create iRules data-group for group client IP address that using same source NAT IP for translate to servers, GUI > Local Traffic > iRules > Data-Group

iRules Data-Group
iRules Data-Group Group-A
iRules Data-Group
iRules Data-Group Group-B

Step2: Create SNAT Pool for add IP for translate client IP address, in this case we create 2 SNAT pool for iRules Data-Group client group-a and group-b, GUI > Address Translation > SNAT Pools

SNAT Pools A
SNAT Pools B

Step3: Create iRules check client IP and translate before send traffic to servers, GUI > Local Traffic > iRules

when CLIENT_ACCEPTED {
if { [class match [IP::client_addr] equals “group-a”] } {
snatpool snat-pool-a
} elseif { [class match [IP::client_addr] equals “group-b”] } {
snatpool snat-pool-b
}
}

F5 iRules
F5 iRules

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