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Paper Abstract and Keywords
Presentation 2026-03-03 16:00
Allowlist-Based DDoS Attack Mitigation Using Web Access Logs
Yasuhiro Teramoto, Yusuke Nakayama, Takahiro Hamada (NTT) ICSS2025-105
Abstract (in Japanese) (See Japanese page) 
(in English) Allowlist-based DDoS mitigation aims to maintain service availability under network congestion caused by large-scale attack traffic by registering allow rules on network devices to preferentially pass legitimate users’ traffic. However, because the number of filtering rules that can be installed on a device is limited, prioritizing allowed entities and aggregating rules (e.g., by network segment) are essential. Moreover, the spread of mobile communications has increased the number of users whose IP addresses change within short periods, and allowlists constructed at the IP level may lose effectiveness over time. Conventional methods based solely on source IP addresses provide limited information for prioritization and cannot sufficiently identify highly dynamic IPs. Therefore, we propose an allowlist construction method that leverages characteristics such as User-Agent information extracted from the access logs of protected web servers and enables selection of IP- or subnet-level granularity
Keyword (in Japanese) (See Japanese page) 
(in English) DDoS / Allowlist / Network Security / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 381, ICSS2025-105, pp. 142-147, March 2026.
Paper # ICSS2025-105 
Date of Issue 2026-02-24 (ICSS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF ICSS2025-105

Conference Information
Committee ICSS IPSJ-SPT  
Conference Date 2026-03-03 - 2026-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Prefectural Museum & Art Museum 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Security, Trust, etc. 
Paper Information
Registration To ICSS 
Conference Code 2026-03-ICSS-SPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Allowlist-Based DDoS Attack Mitigation Using Web Access Logs 
Sub Title (in English)  
Keyword(1) DDoS  
Keyword(2) Allowlist  
Keyword(3) Network Security  
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1st Author's Name Yasuhiro Teramoto  
1st Author's Affiliation NTT, Inc. (NTT)
2nd Author's Name Yusuke Nakayama  
2nd Author's Affiliation NTT, Inc. (NTT)
3rd Author's Name Takahiro Hamada  
3rd Author's Affiliation NTT, Inc. (NTT)
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Speaker Author-1 
Date Time 2026-03-03 16:00:00 
Presentation Time 20 minutes 
Registration for ICSS 
Paper # ICSS2025-105 
Volume (vol) vol.125 
Number (no) no.381 
Page pp.142-147 
#Pages 6 
Date of Issue 2026-02-24 (ICSS) 

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