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Special Forums Cybersecurity Need Help with this TCPDUMP output... Post 302885338 by Lost in Cyberia on Friday 24th of January 2014 08:05:23 PM
Old 01-24-2014
Need Help with this TCPDUMP output...

Hello everyone, so I'm getting this tcpdump, and it looks like..quite a mess... Can anyone decipher this? I can tell that one IP is requesting DNS info? but I'm having trouble finding out what some of the fields actually mean..

Code:
19:44:50.707637 IP 66.81.1.252.53 > 64.147.113.139.28638: 52313 243/2/7 SOA, A 204.46.43.46, A 204.46.43.47, A 204.46.43.48, A 204.46.43.49, A 204.46.43.50, A 204.46.43.51, A 204.46.43.52, A 204.46.43.53, A 204.46.43.54, A 204.46.43.55, A 204.46.43.56, A 204.46.43.57, A 204.46.43.58, A 204.46.43.59, A 204.46.43.60, A 204.46.43.61, A 204.46.43.62, A 204.46.43.63, A 204.46.43.64, A 204.46.43.65

I know the first set of numbers if the time stamp...the 2nd is the IP address..and the next is the destination IP...with the port number after the semicolon. What comes next the '243/2/7 is what confuses me... I know SOA is the start of authority but what does it all mean together? I have a huuuge flood of traffic with these type of output..Can some one break this down for me?
 

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Net::DNS::Mailbox(3)					User Contributed Perl Documentation				      Net::DNS::Mailbox(3)

NAME
Net::DNS::Mailbox - DNS mailbox representation SYNOPSIS
use Net::DNS::Mailbox; $mailbox = new Net::DNS::Mailbox('user@example.com'); $address = $mailbox->address; DESCRIPTION
The Net::DNS::Mailbox module implements a subclass of DNS domain name objects representing the DNS coded form of RFC822 mailbox address. METHODS
new $mailbox = new Net::DNS::Mailbox('John.Doe@example.com'); $mailbox = new Net::DNS::Mailbox('John Doe <j.doe@example.com>'); Creates a mailbox object which represents the DNS domain encoded form of the mail address specified by the character string argument. The argument string consists of printable characters from the 7-bit ASCII repertoire. address $address = $mailbox->address; Returns a character string containing the RFC822 mailbox address corresponding to the encoded domain name representation described in RFC1035 section 8. DOMAIN NAME COMPRESSION AND CANONICALISATION
The Net::DNS::Mailbox1035 and Net::DNS::Mailbox2535 subclass packages implement RFC1035 domain name compression and RFC2535 canonicalisation. COPYRIGHT
Copyright (c)2009,2012 Dick Franks. All rights reserved. This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
perl, Net::DNS, Net::DNS::DomainName, RFC822, RFC1035, RFC5322 perl v5.18.2 2014-01-16 Net::DNS::Mailbox(3)
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