syn flood attacks from NL-based netblocks

Valdis Kl=?utf-8?Q?=c4=93?=tnieks valdis.kletnieks at
Mon Aug 19 17:56:59 UTC 2019

On Mon, 19 Aug 2019 20:44:47 +0300, Töma Gavrichenkov said:

> Not in a typical DC/ISP environment!  With the solution you propose, a
> perfect routing symmetry is a hard requirement, b/c you need to make
> sure a returning SYN/ACK hits the very same machine as the initial
> SYN.

If your load balancer isn't doing something to make that situation work properly,
you need to talk to your vendor.
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