DYNAMIC ROUTING UNDER SECURITY CONSIDERATIONS By Archana
TABLE OF CONTENTS
Disadvantages of Static Routing
Security problems in Routing
Networking is growing rapidly
Dynamic routing necessity in large networks
Need to consider the security problems
ROUTER AND ROUTING
Router forwards data packets across computer networks.
Routing is selecting paths in a network along which to send network traffic.
Manually adding routes to the routing table.
routes through a data network are described by fixed paths
usually entered into the router by the system administrator.
static routing table is created, maintained, and updated by a network administrator, manually.
DISADVANTAGES OF STATIC ROUTING
Difficult to configure
Cannot adapt to addition of new links or nodes
Cannot adapt to link or node failures
Cannot easily handle multiple paths to a destination
Does not scale to large networks
Solution is to use Dynamic Routing
Selection of the routing path by the router upon updating the routing table dynamically.
Follow Dynamic Routing protocol to update messages between routers
Automatically update routing table when topology changes
Determine best path to a destination.
DYNAMIC ROUTING PROTOCOLS
Function(s) of Dynamic Routing Protocols :
-Dynamically share information between routers.
-Automatically update routing table when topology changes.
-Determine best path to a destination.
DYNAMIC ROUTING VS STATIC ROUTING Complexity Configuration Generally Independent of the Network size Increases with network size Required Administrator Knowledge Advanced Knowledge Required No Extra Knowledge is required Topology Changes automatically Adopts to Topology Changes Administrator intervention is required Scaling Suitable for simple and complex networks Suitable for simple networks Security Less secure More Secure Predictability Routing Depends on the current topology Routing to destination is always same
It is a data structure in the form of a table-like object stored in a router
Table consists of at least three information fields:-
EXAMPLE Routing table for B Destination Cost Next Hop A 1 A C 1 C D 2 C E 2 A F 2 A G 3 A
O rganization system needs high security for data transmission from one organization to other organizations system.
Hackers can steel the information from the organization if the network is not secured.
Security is major problem in Defence and Government network organizations.
Mainly two types of algorithms:
Link state Routing Algorithm
Network topology is known by all nodes
Distance Vector Routing Algorithm
Rely on exchanging info among neighbor nodes.
To Analyze the existing Routing Algorithms
Propose a new Routing Algorithm which satisfies the security problems
Conduct simulation to verify the results
Show the capability of the proposed algorithm
Efficient Algorithms are needed for optimal path selection in large networks.
Secured algorithms are also needed for the routing.
Proposed Algorithm should support many routing protocols