Mobile IP By Josh Capers Derek Steele Oluwatosin

Mobile IP By: Josh Capers, Derek Steele, Oluwatosin Akinwusi, Dyanne Marquez, Erica Waleski, & Rogelio Castillo Pineda CS 4622/02 April 25, 2018

Mobile IP What is Mobile IP? • Mobile IP is a standard communication protocol that enables a computer to roam freely on the Internet or an organization's network while still maintaining the same home address. • Mobile IP allows mobile node to use two IP addresses. • A fixed home address • A care-of address 2

Mobile IP Topology How datagram moves from one point to another on a Mobile IP network: 3

Mobile IP 4 Mobile IP Functional Entities: ● Mobile Node (MN) – Host or router that changes its point of attachment from one network to another. ● Home Agent (HA) – Router on a mobile node's home network that intercepts datagrams destined for the mobile node, and delivers them through the care-of address. ● Foreign Agent (FA) – Router on a mobile node's visited network that provides routing services to the mobile node while the mobile node is registered.

Mobile IP Applications of Mobile IP Why Mobile IP? • Remote Access VPNs (Virtual Private Network) • Microsoft Office and Windows • Database Application • Voice over IP 5

Mobile IP 6 Remote Host & Mobile Host Communication

Mobile IP Agent Discovery ● The first phase in mobile communication, consists of two sub-phases. ○ Discover a home agent before it leaves its home network. ○ Discover a foreign agent after it has moved to a foreign network. ● The discovery involves two types of messages: advertisement and solicitation. 7

Mobile IP 8 Agent Advertisement & Solicitation ● When a router advertises its presence on a network using an ICMP router advertisement, it can append an agent advertisement to the packet if it acts as an agent. ● When a mobile host has moved to a new network and has not received agent advertisements, it can initiate an agent solicitation. ● It can use the ICMP solicitation message to inform an agent that it needs assistance.

Mobile IP Registration • There are four aspects of registration: 1. Register itself with the foreign agent. 2. Register itself with its home agent. 3. Renew registration if it has expired. 4. Cancel its registration (deregistration) when it returns home. 9

Mobile IP 10 Registration Request & Reply ● A registration request is sent from the mobile host to the foreign agent to register its care-of address and also to announce its home address and home agent address. ● A registration reply is sent from the home agent to the foreign agent and then relayed to the mobile host. ○ The reply confirms or denies the registration request.

Mobile IP Data Transfer Path 1: From Remote Host to Home Agent Path 2: From Home Agent to Foreign Agent Path 3: From Foreign Agent to Mobile Host Path 4: From Mobile Host to Remote Host Transparency 11

Mobile IPv 6 Benefits ● More addresses ● Better Security: ○ Authentication & Encryption improvements over IPv 4 ● Address autoconfiguration ● Better performance ○ Less traffic through home agent ○ Less traffic redirection/re-routing ● Supports bidirectional tunnelling ● Source Routing ○ No need for Foreign agent ● All IPv 6 ready devices & networks are Mobile IPv 6 ready 12

13 Mobile IPv 6 vs IPv 4 IPv 6 IPv 4 Mobile Node Foreign Agent Requests Service Home Network Tunnelled packets Service Acknowledgement / Reply Sends Request for Service Home Agent Foreign Network

14 Mobile IPv 6 vs IPv 4 IPv 6 IPv 4 Mobile Node Foreign Agent Requests Service Home Network Tunnelled packets Service Acknowledgement / Reply Sends Request for Service Home Agent Foreign Network

15 Mobile IPv 6 vs IPv 4 IPv 6 IPv 4 Mobile Node Foreign Agent Requests Service Home Network Tunnelled packets Service Acknowledgement / Reply Sends Request for Service Home Agent Foreign Network

16 Mobile IP Improvements Reverse Tunneling. Same IP Address Resolution Protocol (ARP)Unauthenticated

Mobile IP Flaws of Mobile IP • Security Attacks • Denial of Services • Passive Eavesdropping • Insider Attack • Replay Attack 17

Mobile IP Flaws of Mobile IP • Triangulation • “Triangle Routing” • Causes routing inefficiency between the home and foreign agents • Firewalls • Care of Addresses • Fake Care of Addresses 18

19 Mobile IP Future Scope As transmitted data increases: Triangulations- Finding optimal paths Reliability-perpetual TCP connections

Mobile IP Questions? 20 ?

Mobile IP 21 Works Cited ● “Chapter 1 Overview of Mobile IP. ” Oracle, 2010, https: //docs. oracle. com/cd/E 19455 -01/806 -7600/6 jgfbep 0 v/index. html. Web. ● Chandrasekaran, Janani. Mobile IP: Issues, Challenges, and Solutions. Rutgers University, pdfs. semanticscholar. org/3260/bef 6685475 e 6 daa 30 aaf 5 f 69 bb 21 d 766 cc d 8. pdf. ● Forouzan, Behrouz A. TCP/IP Protocol Suite. 4 th ed. , Mc. Graw-Hill, 2010. ● “Introduction to Mobile IP. ” Cisco, 19 Mar. 2015, www. cisco. com/c/en/us/td/docs/ios/solutions_docs/mobile_ip/mobil_ip. h tml. Web.

Mobile IP 22 Work Cited continued ● Mahmood, Sohaib. "Triangle Routing in Mobile IP. " Lahore University of Management Sciences, Pakistan. ● “Mobile IP Administration Guide”, Oracle 2010, https: //docs. oracle. com/cd/E 19455 -01/806 -7600/6 jgfbep 0 v/index. html ● “Mobile IP. ” SRM University. Power. Point. ● Perkins, Charles E. “Mobile IP. ” Mobile IP - IEEE Journals & Magazine, ieeexplore. ieee. org/stamp. jsp? tp=&arnumber=592101&tag=1. ● Perkins, et al. “Mobility Support in IPv 6. ” IETF Tools, July 2011, tools. ietf. org/html/rfc 6275. Web.