ranonymize too slow?

[Christos Papadopoulos]

On 12/02/2014 12:40 AM, Carter Bullard wrote:
> Hey Christos,
> Did you specify a ranonymize.conf file, or are you using all defaults ?

I customized the ranonymize.conf file do anonymize IP adresses only. See 
below.

> You may want to allocate addresses using a different strategy.  Using the default algorithm, the allocation of 55M addresses will take some time, did you get any output at all  ???

I need to use prefix-preserving anonymization, similar to cryptopan. 
Which algorithm would you suggest?

I do see the output file growing. It just takes a really long time, to 
the point where it is unusable for our case.

Here are the settings I used. Please let me know if I should change 
anything. I only need IP addresses anonymized,

RANON_SEED=29384938
RANON_TRANSREFNUM_OFFSET=no
RANON_SEQNUM_OFFSET=no
RANON_TIME_SEC_OFFSET=no
RANON_TIME_USEC_OFFSET=no
RANON_ETHERNET_ANONYMIZATION=no
RANON_PRESERVE_ETHERNET_VENDOR=yes
RANON_PRESERVE_ETHERNET_BROADCAST=yes
RANON_PRESERVE_ETHERNET_MULTICAST=yes

RANON_NET_ANONYMIZATION=sequential
RANON_HOST_ANONYMIZATION=sequential
RANON_AS_ANONYMIZATION=sequential
RANON_NETWORK_ADDRESS_LENGTH=24

RANON_PRESERVE_NET_ADDRESS_HIERARCHY=cidr/24
RANON_PRESERVE_BROADCAST_ADDRESS=yes
RANON_PRESERVE_MULTICAST_ADDRESS=yes
RANON_PRESERVE_IP_ID=none
RANON_PRESERVE_ICMPMAPPED_TTL=yes
RANON_PRESERVE_IP_TTL=none
RANON_PRESERVE_IP_TOS=none
RANON_PRESERVE_WELLKNOWN_PORT_NUMS=yes
RANON_PRESERVE_REGISTERED_PORT_NUMS=yes
RANON_PRESERVE_PRIVATE_PORT_NUMS=yes
RANON_PORT_METHOD=no

Christos.

>
> Carter
>
>
>
>> On Dec 2, 2014, at 2:38 AM, Christos Papadopoulos <christos at cs.colostate.edu> wrote:
>>
>> Hi Carter,
>>
>> We are using the latest version of the client tools.
>>
>> After letting it run for 4.5 hours I had to kill it. There are just under a billion records in the file. When I killed it, this is what I got. I have no idea how much longer it would run.
>>
>> Address Summary
>>   IPv4 Unicast              src 11411339    dst 43953546
>>   IPv4 Unicast Private      src 85          dst 353
>>   IPv4 Unicast Reserved     src 12654028    dst 51692353
>>   IPv4 Multicast Local      src 0           dst 2
>>
>> Christos.
>>
>>> On 12/01/2014 11:49 AM, Carter Bullard wrote:
>>> Hey Christos,
>>> The primary demand in IP address anonymization is the number of IP addresses that need to be anonymized.   So how many addresses are in the file ??
>>>
>>>    racount -M addr -r big.file
>>>
>>> What version of clients are you using ??
>>> Carter
>>>
>>>> On Dec 1, 2014, at 1:14 AM, Christos Papadopoulos <christos at cs.colostate.edu> wrote:
>>>>
>>>> Hi folks,
>>>>
>>>> I am trying to use ranonymize for some large argus files. This is useful for us because we want to share some argus data with fellow researchers, but anonymize them to protect the innocent.
>>>>
>>>> The file I am trying to anonymize is large, about 18GB compressed. As you can imagine, there are millions of flows in there.
>>>>
>>>> I only want IP address anonymization, so I turned everything else off in the ranonymize.conf file.
>>>>
>>>> Well, ranonymize has been running for almost 3 hours with about 1/20th of the file done. It is using 100% of a CPU, but only 4% of memory in a 32GB machine. Clearly it's not a memory or swap issue.
>>>>
>>>> I can't figure out why it's taking so long. I thought it would be almost as fast as reading and writing the file plus some time to compress/decompress and some time for checking the hash for the anonymized addresses.
>>>>
>>>> Any idea what's pounding the CPU and slowing it down? I can investigate further by profiling the code, but thought I throw the question out there first in case someone else has done it.
>>>>
>>>> Thanks!
>>>>
>>>> Christos.
>>
>>