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Od: "Massimo S." <ecs-isp@2rosenthals.com> Glava
Izvorno E-sporo?ilo
Zadeva: Re: [eCS-ISP] DDOS attacks and tcp/ip SYNCOOKIE flag
Datum: Fri, 6 Feb 2026 08:53:15 +0100
Za: eCS ISP Mailing List <ecs-isp@2rosenthals.com>

Il 06/02/2026 00:50, Peter Moylan ha scritto:
On 06/02/26 06:07, Massimo S. wrote:
Il 04/02/2026 14:30, Ian Manners ha scritto:

to mitigate the effects of DDOS attacks (eg. the ones on port 80 and
443) it is
suggested to turn ON syncookie tcp/ip flag.

syncookie is broken on OS/2's implementation, do not turn it on.

and there are no plans to fix this?

You could try asking Microsoft to release the source code.

Hi Peter,

i recall that the OS/2 stack ip is a porting from AIX.

If it's from Microsoft maybe it was already open source,
like a a number of parts of Windows are today.

massimo
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