ENAVis: Enterprise Network Activities Visualization Qi Liao, Andrew Blaich, Aaron Striegel, and...

ENAVis: Enterprise Network

Activities Visualization

Qi Liao, Andrew Blaich, Aaron Striegel, and Douglas Thain

Department of Computer Science & Engineering

University of Notre Dame

cse.nd.edu

Problem

04/19/2322nd Large Installation System Administration

Conference (LISA '08), Nov. 9-14, 2008. San Diego, CA 2

Complex systems are hard to understand and visualize.

Plenty of micro-level tools Host level (syslog, ssh log, etc) Network level (MRTG, Netflow, etc)

Need macro-level picture of network Not just in raw network connectivity Need to know:

Who (users) are responsible What (applications) are running on the network.

Context vs. Content



NetFlow & sFlow Analyzer

Who?

What?

Packet content (protocol:IP

address:port number)

local context (Network

connection, user, application, arguments, file accesses)

Host

ENAVis

04/19/23

Users

4

Applications

22nd Large Installation System Administration Conference (LISA '08), Nov. 9-14, 2008. San Diego, CA

IP/Port ≠ User/App

Logging usually in form of Network addresses User identity Port numbers Application identity

Network addresses and port numbers are NOT good identifier for network activities

Two problems: Lack of a mechanism to collect this missing

Local Context. Lack of a tool to correlate the huge amount of

local context data. Visually and interactively explore the data. Visualization is the key.



Highlights

Local Context Data Collection Light-weight, easy-to-deploy,

monitoring agent Scalable central data processing

Heterogeneous Graph Hierarchical graph representation of data HUA: Hosts, Users, Applications Local-context aware connection chaining

Visualization Statistics report and chart plotting Visualize HUA graphs and perform queries Interactive exploration



Data Collection

Need to know 4W for each network connection who (users) what (applications) when (time) where (hosts)

Proof of concept: An easy to deploy and lightweight agent written in

bash script Only calls commonly available system tools KISS

A hierarchy of local context gathering Tier one: netstat Tier two: ps Tier three: lsof (optional)



Built-in System Tools

netstat Displays network connections and configurations Whois for network connectivity Proto, src/dst IP/port, State -e UID, -p PID

ps Currently running processes. PID GID, PPID, argument list

lsof All open files Location (full path) of application, libs, files

diff Difference of two consecutive outputs > start of a new record < end of an existing record



Directories/files structure



days

hosts

Agent Performance

300+ machines on our campus since April 2007 Over 400 GB data Mix of CSE faculty / students, scientific grid,

engineering lab. Linux, Solaris, Mac OS X, (Windows) CPU

<100 ms CPU time every 5 sec (2%)

Bandwidth Total data size sent to the server: < 3 MB / day 1000 hosts: 240 Kbps



Server Performance

Disk Sun Fire X2100, AMD Opteron dual core (2.2GHz), 2

GB SDRAM, 1TB SATA disk. 1000 hosts, window size = one year: 1 TB disk 300 hosts, window size = past month: 30 GB

Processing Time

Up to 4500hosts



HUA Graph Model



Heterogeneous graph 4D space

Hosts, Users, Applications (HUA), Time A meta-graph illustrating states

Host-to-Host(similar to Netflow)

Application-to-ApplicationUser-to-User

Host-to-User Host-to-App

User-to-App

Example: HU graph

A HUA graph uses “User” nodes to glue “Host” and “Application”

nodes use “Application” nodes to glue local and remote parties.



Identities Linking

Perform connection chaining and bipartite matching. Mapping src/dst identifiers in O(n) time.

Allow explicit identity linking between any pair of nodes. User and Application identities is no longer inferred from

host addresses or port numbers.



Implementation

Tool developed using Java, JFreeChart, and Prefuse.



Load n days’ connection data whose state = established.

Graph View



Monitored hosts

Users

Apps

External Domains

hops

Node selection

Graph controls

Applications



Clusters/subdomains

Hosts

Time window

Enterprise users

Local users

Applications



Top Users

User IDs

User Info

Applications



Application Names

Top Apps

Applications



Finance System

Trusted Host

Violation 1

Violation 2

Summary



Centralized correlation and visualization make life easier for admins

Augmented local-context data (Users and Applications), which are not available in existing schemes.

Traditional approach

ENAVis approach

Conclusion

It is important to know who is responsible and what is running on an enterprise network.

Local-context (users and applications) is useful. Network management, security policy auditing, fault

localization, forensic, etc. ENAVis:

Collects, fuses, and visualizes the missing local-context data.

Interesting HUA network connectivity graph. Interactive exploration tool.

Future works Windows agent as a service Data mining modules built into the tool.



Acknowledgements

This work was supported in part by the National Science Foundation (CNS-03-47392,

CNS-05-49087), as well as Sun Academic Excellence Grant (AEG) (EDUD-

7824-080234-US).



Visit http://netscale.cse.nd.edu/Lockdown/



Thank You !Thank You !

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