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Hamada_Tabosha_'s avatar
Hamada_Tabosha_
Icon for Nimbostratus rankNimbostratus
Jan 05, 2014

using snat i case of load balancing outgoing traffic

Dears, when I use ltm for load balancing the outgoing traffic between two gateways, I do two virual servers : 1- transparent proxy virtual server ? f5 works as a transparent proxy ( destination vs is any ) and we redirect the traffic by using policy based routing (next hop is F5 self ip )

 

2- explicit proxy (the user put the f5 virtual server ip as a proxy in his browser)

 

my question is in which case I need to use SANT?

 

I think for explicit proxy I dont need to use SNAT as the traffic will go to the destination by f5 ip for transparent scenario I need snat if the incoming traffic ( response) has a direct path to the client ( one vlan mode ).

 

I'm I right ?

 

1 Reply

  • Thomas_Gobet's avatar
    Thomas_Gobet
    Icon for Nimbostratus rankNimbostratus
    Jan 06, 2014

    You need to use SNAT when your gateway hasn't got any route to your client IP.

     

    If your gateways can route traffic to your client's IP range, you don't need SNAT. Just remember that if you do SNAT, you have to be careful on which SNAT you will use if you want to differentiate different clients.