[strongSwan] High latencies

Noel Kuntze noel.kuntze+strongswan-users-ml at thermi.consulting
Tue Sep 19 16:16:41 CEST 2017


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Usage of the MSS target in iptables, usage of kernel-netlink.mtu or of MTUs on the routes in the routing tables (check `ip route get` to find what route a packet would take to some destination).
You break PMTU discovery if you don't accept ctstate RELATED or drop ICMP before accepting ctstate RELATED.

On 19.09.2017 16:05, Turbo Fredriksson wrote:
> On 19 Sep 2017, at 14:57, Noel Kuntze <noel.kuntze+strongswan-users-ml at thermi.consulting> wrote: > >> Did you fix the MSS? Is the MTU on the tunnel correct? Did you maybe break PMTU discovery? > > Not sure, can’t remember… How do I check? -----BEGIN PGP SIGNATURE-----

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