# Network packet capture

**URL:** <https://www.ruby-forum.com/t/network-packet-capture/123912>\
**Category:** Ruby\
**Created:** [December 21, 2007, 11:25pm UTC](https://www.ruby-forum.com/t/network-packet-capture/123912 "2007-12-21T23:25:53Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![robintw](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/3ec8ea/32.png) [@robintw](https://www.ruby-forum.com/u/robintw)\
**Post date:** [December 21, 2007, 11:25pm UTC](https://www.ruby-forum.com/t/network-packet-capture/123912/1 "2007-12-21T23:25:53Z")

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Hi  
I wan to capture network traffic so I’ve been looking at pcaplet. It  
seems to work but people are saying that its quite old so I was  
wondering if there was anything newer available.

If there is nothing better, I’ve got two issues with it, the first is  
I get this message three times when I start up a script:

/usr/lib/ruby/site\_ruby/1.8/i686-linux/pcap.so: warning: do not use  
Fixnums as Symbols

I’ve read this is because of something in ruby becoming deprecated,  
what can I do to stop these warnings?

The other problem is that once it has captured a packet it starts  
flooding my network with DNS queries. It gets an answer to its first  
request so it doesn’t need to keep requesting. tcpdump just does a  
single lookup so it doesn’t seem to be the pcap libraries that are  
causing this.

Can anyone help with either of these?

Thanks

Robin