On Fri, 18 Nov 2022, Kumar P S Udai wrote:

One is at the HO establishing connection to three other branch offices, while 
all three are
getting connected, at one branch office the public IP is not configured on the 
machine directly,
but on an external vendor's router.  Initially I had trouble establishing 
connection to this unit,
but after a lot of reading and config change, the connection is getting 
established now, but I
cannot ping or reach each other.  Attaching the config details FYI please.  
Would appreciate any
help from the community.

ON MACHINE PLUTO

000 #45: "PLSUBNET" [email protected] [email protected] 
[email protected]
[email protected] Traffic: ESPin=1KB ESPout=0B! ESPmax=0B

Note traffic coming in, but no traffic going out.

ON MACHINE EUROPA

000 #6276: "PLUTOSUBNET" [email protected] [email protected] 
[email protected] [email protected]
Traffic: ESPin=0B ESPout=1KB! ESPmax=0B
000  

traffic going out, but no traffic coming in.

I suspect that on machine PLUTO, there is a NAT rule that ends up NATing
the traffic before it gets to be IPsec'ed

On PLUTO try:

iptables -I FORWARD -t nat -s 192.168.14.0/24  -d 192.168.1.0/24 -j RETURN

Paul
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