201 · Question #78
Assume a client's traffic is being processed only by a NAT; no SNAT or virtual server processing takes place. Also assume that the NAT definition specifies a NAT address and an origin address while…
The correct answer is C. The source address would be changed to the NAT address and destination address would be left. When an origin server initiates traffic through a BIG-IP configured with a NAT, the BIG-IP translates the origin server's source IP to the configured NAT address.
Question
Assume a client's traffic is being processed only by a NAT; no SNAT or virtual server processing takes place. Also assume that the NAT definition specifies a NAT address and an origin address while all other settings are left at their defaults. If the origin server were to initiate traffic via the BIGIP, what changes, if any, would take place when the BIGIP processes such packets.
Options
- AThe BIGIP would drop the re quest since the traffic didn arrive destined to the NAT address.The BIGIP would
- BThe source address would not change, but the destination address would be changed to the NAT address.
- CThe source address would be changed to the NAT address and destination address would be left
- DThe source address would not change, but the destination address would be changed to a self IP of the
How the community answered
(36 responses)- A14% (5)
- B8% (3)
- C75% (27)
- D3% (1)
Why each option
When an origin server initiates traffic through a BIG-IP configured with a NAT, the BIG-IP translates the origin server's source IP to the configured NAT address.
The BIG-IP would not drop the request if it is an outbound connection from an origin server that matches a configured NAT rule.
A NAT defined with an origin and NAT address is specifically for source translation of outbound traffic, so the source address would change, not the destination.
A NAT (Network Address Translation) on BIG-IP typically translates outbound traffic from an origin server's IP address to a specific NAT address, so the BIG-IP changes the packet's source address to the defined NAT address while the destination address remains unchanged.
The destination address would remain the original external destination the origin server intended to communicate with, not a self IP of the BIG-IP.
Concept tested: BIG-IP NAT outbound traffic processing
Source: https://techdocs.f5.com/en-us/big-ip-15-1-0/big-ip-local-traffic-management-implementations/configuring-network-address-translation-nats.html
Topics
Community Discussion
No community discussion yet for this question.