[cod] Query limiting...

Marco Padovan evcz at evcz.tk
Tue Oct 25 16:22:48 EDT 2011


Reflection is now targeting someone else:
208.43.236.122 (port 27015)
(cod2 only)

pps rate still quite high :(

Il 25/10/2011 17:14, Luca Farflame Fabbro ha scritto:
> Same here
> same destination IP same port (5121)
> 500 pps on 2 instances of cod 2, cod 4 servers not affected.
> incoming traffic just less than 768 Kbit/s. Probably they have good
> upload "pipes" from where they start the attack.
>
> On Oct 25, 2011, at 3:06 PM, Marco Padovan wrote:
>
>> Looks like the trend is increasing :|
>>
>> currently one of our network filters is reporting:
>> rx:     7.14 Mbit/s 11064 p/s          tx:     3.62 Mbit/s  2764 p/s
>>
>> disabling the filters and passing everything to the cod2 servers the
>> resulting tx bandwidth is a constant 25mbit/sec stream :/
>>
>> current IP being spoofed targeting cod2 servers (all versions
>> "exploited"... both 1.0 and 1.3):
>> 208.93.152.122 (port 5121)
>>
>> to check out if your server is currently being exploited:
>> tcpdump -nn host 208.93.152.122
>>
>>
>>
>> Il 25/10/2011 12:43, Luca Farflame Fabbro ha scritto:
>>> Hi Ryan
>>> 	in one of your previous messages you mentioned that this patch can be "ported" also to the other COD servers. Is there any plan to do this?
>>> Now it seems that even if the server are less in number they target the COD2 servers to do the DDOS attacks. Don't have any COD server running so I don't know if also those are used as reflectors.
>>>
>>> Just one simple question  regarding the patch fort the COD4 server.
>>> If you leave the server up'n running for a certain period of time (no restart for 3 weeks let's say) it seems that when the  
>>> sv_queryIgnoreMegs
>>> limit is reached (our servers don't have a lot of players) the server starts to reply to the query with the spoofed IP's. A restart of the server solves the problem.
>>> I know that it will be better to restart the server before that time but would it be a possible solution to flush the stored bad IP's and restart the check on the new incoming packets when the predefined memory is full or just before this happens (% or minimum sv-ignore free memory)? Usually the attackers use the server as a reflector only for a certain amount of time (form 1 hour or less to a maximum of 2 - 3 days) then a lot of time will pass before having the same IP used as destination of the DDOS attack. 
>>>
>>> Regards
>>> 	Luca
>>>
>>> _______________________________________________
>>> cod mailing list
>>> cod at icculus.org
>>> http://icculus.org/mailman/listinfo/cod
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>
>
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