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Re: [Sks-devel] Search returns 500 MB blob

From: Andreas Puls
Subject: Re: [Sks-devel] Search returns 500 MB blob
Date: Mon, 3 Jun 2019 19:27:02 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0

Hi Sascha,

maybe you can block the request to those keys.
In Feb '19 we had something like a DDoS, a key which made about 90% of
the traffic.

See here:

I create an additonal nginx config, fail2ban will be triggered on error
code 444


Am 03.06.2019 um 15:40 schrieb Sascha Rommelfangen:
> Hi all,
> Is nobody else affected by this issue?
> Nobody able to reproduce it?
> Cheers,
> Sascha
>> On 27 May 2019, at 15:27, Sascha Rommelfangen <address@hidden> wrote:
>> Hi all,
>> We’re just running into a situation where we looked up a key for the email 
>> address address@hidden All keyservers we tried, including our very own one 
>> at, returned a blob of 500 MB.
>> Some key servers return a timeout after 30 seconds. The situation can also 
>> be tested with key ID 0x62cfc8f5, however, the returned blob is much smaller 
>> (23 MB).
>> Has anyone else seen this or similar cases and investigated the root cause 
>> and what can be done to prevent systematically the exhaustion of resources?
>> Thank you very much and with kind regards,
>> Sascha Rommelfangen
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