Basheer Al-Duwairi Jordan University of Science & Technology
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1 Basheer Al-Duwairi Jordan University of Science & Technology
2 Outline Examples of using network measurements /monitoring Example 1: fast flux detection Example 2: DDoS mitigation as a service Future trends Hot topics Challenges
3 Detection and Characterization of Fast Flux Networks ;; ANSWER SECTION: 09-service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A ;; ANSWER SECTION: 09-service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A
4 [B. Al-Duwairi et. al, GFlux: A Google-Based Approach for FFlux Detection, Technical Report. Jordan Univ. of Science & Technology] GFlux- System Overview Input: Suspect domain name ( List of IP addresses (obtained actively or passively) Form a search query Extract # hits from Google results Classify domain name into FFux or Non-FFlux
![of Science & Technology] GFlux- System Overview Input: Suspect domain name (www.xyz.](/docs-images/43/5349768/images/page_4.jpg "com) List of IP addresses (obtained actively or passively) Form a search query Extract")
5 GFlux- Input: domain hosted by CDN ;; ANSWER SECTION: images.amazon.com. 60 IN CNAME ecx.imagesamazon.com.c.footprint.net. ecx.images-amazon.com.c.footprint.net. 230 IN A ecx.images-amazon.com.c.footprint.net. 230 IN A ecx.images-amazon.com.c.footprint.net. 230 IN A Input: images.amazon.com List of IP addresses (obtained actively or passively) Form a search query Extract # hits from Google results Classify domain name into FFux or Non-FFlux
6 ;; ANSWER SECTION: 09-service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A service.ru. 9 IN A GFlux- Input: FFlux domain Input: 09-service.ru List of IP addresses (obtained actively or passively) Form a search query Extract # hits from Google results Classify domain name into FFux or Non-FFlux
7 Data Collection spam trap Oct Mar issue a DNS lookup for every unique domain name using the Linux dig utility Used 240 Planelab nodes Form Query extracted all URLs the Linux urlview utility Record # hits from Google A cleaning stage where only base domain names are produced and repeated entries are removed. Focused on the domain names associated with the highest number of resolved IP addresses. Verified them manually, too, to ascertain they are indeed FFNs. Analyze results
8 [Zakaria Al-Qudah, Basheer Al-Duwairi, and Osama Al-Khaleel, DDoS Protection as a Service: Hiding Behind the Giants, To appear in International Journal of Computational Science and Engineering] DDoS Protection as a Service Web server (content server) CDN Network Web server (content server) CDN Edge server Web client (a) In the absence of an attack Web client (a) During an attack
![Engineering] DDoS Protection as a Service Web server (content server) CDN Network Web server](/docs-images/43/5349768/images/page_8.jpg "(content server) CDN Edge server Web client (a) In the absence of an attack Web client (a)")
9 Performance evaluation/ experiments Downloading static object from origin server vs. via an CDN edge server acting like a proxy Object type: PDF file Object size: 3.1 MB Origin Server: fedex.com CDN network: Akamai Downloads are performed from 391 Planetlab nodes For each node two downloads for the identified object: one from origin.fedex.com and the other from images.fedex.com Frequency: once every hour for a period of 24 hours Important issue: ensuring that the CDN edge server fetches a fresh copy of the object Solution: We append the download from images.fedex.com with a random query string
10 Performance Results The figure plots the difference between effective download bandwidth in the two cases (CDN download minus direct download). Most of the Planetlab nodes, downloading via the CDN have better performance. This is due to the fact that CDNs optimize the path through which they fetch objects from the origin server. Correspond to downloads via the CDN Correspond to direct downloads from the origin server
11 Future trends: Hot topics + main challenges Most of web traffic is referred by search engines + social networks websites Google, yahoo, Facebook, twitter, etc. What traffic needs to be collected/monitored to infer malicious activities? Collecting data from social networks investigating and exploring the tradeoffs between services and privacy guarantees
12 Challenges / Future Trends Collecting SMS traffic traces across multiple mobile network operators Operators need greater visibility and understanding of the applications running in their networks Explosive growth in the number of web and mobile applications Application hiding techniques like encryption, port abuse, and tunneling Little research has been done to characterize/detect spam/scam campaigns What percentage of spam received users is effective?
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idatafax Troubleshooting About idatafax idatafax is a client application that connects back to a server at the PHRI based in Hamilton, Ontario, Canada. It is not known to interfere with any software and