Re: merge pcap from two interfaces

[luke devon via Wireshark-users <wireshark-users () wireshark org>]

 Hi Chris, 
I was able to execute the following command. syntaxes are same for the tshark and dumpcap.
dumpcap -i enp0s3 -i enp0s8 -b duration:15 -w /usr/etc/enp0s3_enp0s8.pcap 

output as follows;
enp0s3_enp0s8_00001_20180513174130.pcap
enp0s3_enp0s8_00002_20180513174145.pcap

every 15sec, the file name is rolling out.
1. Can you please guide me, how to make the file compressed? for example; enp0s3_enp0s8_00001_20180513174130.tar.gz2. 
also can I change the format of the timestamp in the file name?  Something similar to this --> 
trace_%Y-%m-%d_%H-%M-%S.pcap

I was using following tcpdump command to capture, adding the timestamp and compressing the traces.
tcpdump -i eno2 -s 0 -G 15 -w '/test/Network_%Y-%m-%d_%H-%M-%S.pcap' -Z root -z gzip

But I cant use this command continuously as it has limitations to capture multiple interface same time in a single 
command.
Thanks & RegardsLuke.


    On Sunday, 13 May 2018, 10:48:28 AM GMT+8, luke devon via Wireshark-users <wireshark-users () wireshark org> wrote: 
 
 
  Hi Chris,
Thank you so much for the guidance.
May I know, can we use tshark to rotate the traces every 15 sec? and can we compress into tar.gz the completed dump?
RegardsLuke
    On Sunday, 13 May 2018, 1:08:32 AM GMT+8, Maynard, Chris <Christopher.Maynard () IGT com> wrote:  
 
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Do you have to usetcpdump?  If you havetshark available, then you can capture on both interfaces at the same time 
without the need to merge separate capture files at all.  For example:
 
  
 
tshark -i eth0 -i eth1 –w eth0_eth1.pcapng
 
  
 
Refer to the tshark[1] (or dumpcap[2]) man pages for more information.
 
- Chris
 
[1]:https://www.wireshark.org/docs/man-pages/tshark.html
 
[2]:https://www.wireshark.org/docs/man-pages/dumpcap.html
 
  
 
  
 
From: Wireshark-users [mailto:wireshark-users-bounces () wireshark org]On Behalf Of luke devon via Wireshark-users
Sent: Saturday, May 12, 2018 8:17 AM
To: Community support list for Wireshark <wireshark-users () wireshark org>
Cc: luke devon <luke_devon () yahoo com>
Subject: Re: [Wireshark-users] merge pcap from two interfaces
 
  
 
Hi Abhik, 
 
  
 
  
 
Thank you for the reply.
 
  
 
The reason is, the server got few more interfaces too. I want to capture specifically etho and etho1, Not other 
interfaces. That's why I can't use "-i any".
 
  
 
Regards
 
Luke
 
  
 
On Saturday, 12 May 2018, 6:38:55 PM GMT+8, Abhik Sarkar <sarkar.abhik () gmail com> wrote:
 
  
 
  
 
Hi Luke,
 
You could use mergecap (https://www.wireshark.org/docs/wsug_html_chunked/AppToolsmergecap.html).
 
Alternately, run tcpdump with "-i any" to have the capture for all interfaces in the same file (unless you have good 
reason to keep them separate, of course).
 
Regards,
 
Abhik
 
  
 
On 12 May 2018 at 14:14, luke devon via Wireshark-users <wireshark-users () wireshark org> wrote:
 

Hi 
 
  
 
I have a server which has multiple ethernet interfaces and carrying network traffic to the system. every 15sec, roll 
out to the next tcpdump. Likewise, it will generate 4 - pcap file in a minute. 
 
  
 
eth0 will generate 4 pcap files
 
eth1 will generate 4 pap files.
 
  
 
I wanna merge respective etho and eth1 files by matching with the time stamp.
 
  
 
can it be done? Please help.
 
  
 
Thank you
 

Luke  
  
 



 
  
 
  
 
  
 
  
 
  
 

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