Internet UTM Firewall Appliances developed by Global Technology Associates, Inc, GTA include IPS, VPN, Virus Blocking, Spam Filtering and URL Filtering.
Unified Threat Management Technology | GTA, Inc.
Concept 3
Outbound packets originating from the PSN can pass transparently through the GTA firewall to the External network and return. Network address translation is performed on the packet header (and its payload if required) resulting in the source IP address is that of the External network interface. A new source port is also assigned.

 
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