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Comunicaciones2's avatar
Comunicaciones2
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Feb 18, 2014

SMTP Load Balancing without SNAT Outbound traffic problems

Hello,   I’m sorry because this is an issue that it has been reviewed in the forum, but in our case it doesn’t work and we don`t know what is the problem. We have two STMP VLANs, internal (192.168...
application delivery
design
LTM
outbound
smtp
traffic
Comunicaciones2's avatar
Comunicaciones2
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Jun 12, 2014

Hello,

 

We finally solved the problem. We configured all of this, but we also need to configure a fastL4 Outbound traffic profile, activating loose initiation and loose close. With this configuration, it worked perfectly.

 

Regards.

 

  • Carlos_Alperin's avatar
    Carlos_Alperin
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    Sep 22, 2014
    Can you resume how did you make it work? We 're facing the same issue. INBOUND works perfect, but OUTBOUND with SNAT or without SNAT with Network Forwarding stops all the traffic OUTBOUND.
  • Comunicaciones2's avatar
    Comunicaciones2
    Icon for Nimbostratus rankNimbostratus
    Sep 22, 2014
    Sure! All you need is to create a virtual server without SNAT (Automap). The virtual IP (selfIP) of the has internnal VLAN has to be the default gateway of the server you want to balance. You have to create a default route pointing to the default gateway of the balancing VLAN (external VLAN). Thereby, the outbounf traffic will know how to get the destination network in outbound traffic. Furthermore, you have to create an outbound virtual server, type Forwarding IP, with 0.0.0.0 destination, and without automap. In this virtual server, you have to configure a fastL4 Protocol Profile. You have to modify the fastL4 profile, and activate Loose Initiation and Loose Close. And that's all.