[Swan] IPsec tunnel ping succedes only initially

Matteo Centonza matteo at metatype.it
Thu Feb 14 02:21:06 UTC 2019


i'm trying to establish a stable ipsec tunnel between an aws vpc and my
home lab.

I've configured a centos 7.6 machine with libreswan-3.25.4-1 in ec2 and i'm
using a vodafone modem as client (total blackbox).

IPsec tunnel starts just fine,  but often ping timeouts after first
successful packet and i need to restart connection. I've tried to play with
several options (including mtu changes) but without luck.

Does this rings any bell?

Would be great to have any pointer on how to possibly debug this.

Thanks for any insight,

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