network security / information security
TRANSCRIPT
Router Simulation System for mitigating Network Security
attacks
Rohan ChoudhariBE(IT)AEC,Beed
Background for This Project?
Basics of InfoSec
Confidentiality Integrity Availability
Prevents Unauthorized use or disclosure of information
Safeguards the accuracy and Completeness of information
Authorized users have reliable And timely access to the resources
Why Security ? The internet was initially designed for connectivity
(ARPANET). Trust Assumed We do more with the internet nowadays Security protocols are added on the top of TCP/IP
Fundamental aspects of information must be protected . Confidential data Employee information Business models Protect identity and resources
We can’t keep ourselves isolated from the internet Most business communications are done online We provide online services We get services from 3rd party organizations
Attacks on different layersLayer 7: DNS ,DHCP,HTTP,FTP,IMAP,LDAP,NTP,SSH,SMTP, SMNP, Telnet,TFTP
Layer 5 :SMB, NFS,Socks
Layer 3 :IPv4,IPv6,ICMP
Layer 2 :PPTP , Token Ring
DNS poisoning,phishing,SQL injection
TCP Attack , Routing attack, SYN flooding, Sniffing
Ping ,ICMP ,Flood
ARP Spoofing ,MAC Flooding
TCP Attacks
Exploits the TCP 3 way handshake Attacker sends a series of SYN packets
without replying the ACK packetFinite queue size for incomplete
connectionsSYN
ACKSYN+ACK
SERVER
TCP Attacks
Exploits the TCP 3 way handshake Attacker sends a series of SYN packets
without replying the ACK packetFinite queue size for incomplete
connectionsSYN
SYN+ACK
SERVER(victim)ACK ?
DNS cache poisoning
client
I want to access www.example.com
DNS catching server
1
2
QID =64571
Root /GTLD
ns.example.comwebServer192.168.1.1
3
3
www.example.com192.168.1.1
QID =64571
QID=64569QID=64570QID=64571 Match !
(Pretending to be Authoritative zone)
www.example.com192.168.1.99
Common Types of attacks Reconnaissance-ping sweeps and port scans
Sniffing –capture packet as they travel through the network
Man-in–the-middle-attack: intercepts messages that are intended for a valid device.
Spoofing –sets up a fake device and trick others to send messages to it.
Hijacking- taking control of session
Denial of service (DoS) Dynamic DoS (DDoS)attack
Trusted Network
Standard defensive-oriented technologies Firewall-first line of defense Intrusion Detection
Build TRUST on top of the TCP/IP Infrastructure Strong authentication Two factor authentication Something you have + something you know
Public key infrastructure (PKI)
Access control
Access control – ability to permit or deny the use of an object by a subject
It provide 3 essential services (known as AAA)-
Authentication-(who can login) Authorization - (what authorized users can do ) Accountability –(identifies what a user did )
Important Steps to Security• Password Protection
• Protecting the network by filtering Network Access and Traffic (i.e. Firewall)
• Running Security Audits
• Examine and monitor log files
• Use commonense: avoid dumpster divers and social engineers
FirewallsA firewall is a computer, hardware, or even a piece of software that sits between your network and the Internet, the firewall attempts to regulate and control the flow of information preventing an array of potential attacks.
A router utilizing Network Address Translation(NAT)
Software firewalls such as Zone Alarm, Kerio Firewall, Outpost, etc.
Hardware firewalls such as Sonic’s SOHO firewall.
Operating system firewalls Ex.Window XP’s built in filtering .
Virtual Private NetworkCreates a secure tunnel over a public network Client-to-firewall , router-to-router , firewall-to-
firewallVPN protocol standards: PPTP-(Point-to-Point Tunneling protocol) L2F -(Layer to Forwarding Protocol) L2TP-(Layer to tunneling Protocol) IPSec(Internet Protocol Security)
Significance of this project It makes your computer a router !
And a Gateway router too!!Benefits:
Test new configurationsNew routing policiesNew protocols
Don’t disturb the production network Use cheap PCs instead of expensive routers.
Screenshots of project
Choosing simulation Environment
Output screen showing proposed network infrastructure in a simulated environment
Mesh Topology
Bus Topology Simulation
Choosing various routing algorithms for simulaion
Simulating Source Routing Algorithm
Finding Algorithmic Efficiancy
Magic Starts Here …
conclusion The Simulator takes the configurations of
the subnet as Input and gives the different statistics of the routers and links. By changing the routing algorithms and the different network configurations and recording the results we obtain the optimal algorithm. The optimal algorithm for a particular network is obtained by analyzing the results obtained. Simulation helps to achieve an optimal path that reduces the cost of routing and helps to maintain network efficiency very easily.
Conclusion And Future Scope The smaller networks can be analyzed and the results can be employed in larger networks to make routing efficient and economic. As the Simulator has provision for the crashing of routers, it gives an idea of which path is followed when a crash occurs. It can be employed in real networks to increase the performance of routers and links. As it not feasible in real networks to test algorithms and then implement a best one, Routing Simulation System can be helpful in maintaining Network Security. Hence it is useful for people who provide networking services and those who design networks.
Thank You !
Rohan ChoudhariBE(IT)AEC,Beed