Maybe they're referring to symmetric routing then? And yeah outside of a
LAN you can't get it. It also doesn't matter outside of a LAN. There's a
real phenomenon that can happen with firewalls where you send a TCP SYN
on one interface and the corresponding ACK is received on a different
interface due to an asymmetric path. The firewall might drop the
connection and report the ACK as being spoofed.
Now I've bumped into two different LAN guys who saw asymmetric paths
across the internet and thought it needed to be fixed.
On 8/28/2015 9:22 PM, That One Guy /sarcasm wrote:
What if No they meant synchronous as in same path. They made that
clear, but it clearly indicates they don't know data outside an office.