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Paper Abstract and Keywords
Presentation 2016-05-20 13:25
A Virtual Firewall Scheme that Filters DNS Fragment Packets caused by DNS Amplification Attacks
Eitetsu Gen (Tokai Univ.), Yuichi Sudo (NTT), Junichi Murayama (Tokai Univ.) IN2016-16
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, DNS amplification attacks occur frequently. Those attacks disturb service offering by means of sending many packets to a targeted server from outside of the provider network. As the solution to mitigate attacks, deploying firewalls on the provider-border routers is effective. In this solution, distributed firewalls cooperate with each other. They act as a single virtual router that deploys a dynamic filtering function. Consequently, even if a DNS reply packet is
coming from the different route where the DNS query packet was forwarded previously, it can pass any firewall appropriately. However, in DNS amplification attacks, many fragment IP packets may intrude into the provider network. Filtering those fragment IP packets appropriately by a virtual firewall is not necessarily easy. In order to solve this problem, we propose a virtual firewall scheme that enables to filter DNS fragment packets caused by DNS amplification attacks. When a firewall discards a DNS reply packet by means of layer 4 filtering, it notifies this to all other firewalls. Notified firewalls activate layer 3 filtering temporarily and discard fragment IP packets even if they arrive in a distributive manner.
Keyword (in Japanese) (See Japanese page) 
(in English) DNS amplification attack / reflector / firewall / dynamic filtering / fragment / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 45, IN2016-16, pp. 85-88, May 2016.
Paper # IN2016-16 
Date of Issue 2016-05-12 (IN) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IN2016-16

Conference Information
Committee IN RCS  
Conference Date 2016-05-19 - 2016-05-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IN 
Conference Code 2016-05-IN-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Virtual Firewall Scheme that Filters DNS Fragment Packets caused by DNS Amplification Attacks 
Sub Title (in English)  
Keyword(1) DNS amplification attack  
Keyword(2) reflector  
Keyword(3) firewall  
Keyword(4) dynamic filtering  
Keyword(5) fragment  
1st Author's Name Eitetsu Gen  
1st Author's Affiliation Tokai University (Tokai Univ.)
2nd Author's Name Yuichi Sudo  
2nd Author's Affiliation Nippon Telegraph and Telephone Corporation (NTT)
3rd Author's Name Junichi Murayama  
3rd Author's Affiliation Tokai University (Tokai Univ.)
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Date Time 2016-05-20 13:25:00 
Presentation Time 25 
Registration for IN 
Paper # IEICE-IN2016-16 
Volume (vol) IEICE-116 
Number (no) no.45 
Page pp.85-88 
#Pages IEICE-4 
Date of Issue IEICE-IN-2016-05-12 

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