Campus LAN at NKN Member Institutions
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1 Campus LAN at NKN Member Institutions RS MANI 1/7/ rd Annual workshop 1
2 Efficient utilization Come from: Good Campus LAN Speed Segregation of LANs QoS Resilient Access Controls ( L2 and L3) NMS Good Collaboration ( National / International) Good Internet Governance Scientists/ Researchers 1/7/ rd Annual workshop 2
3 Various Components Campus network best practice Different Layers function Firewall/IPS AAA/ DHCP/ DNS Server Farm Security Best practices IPV4 & IPv6 VPN Services Gateway Services 1/7/ rd Annual workshop 3
4 USERS USERS Typical Campus Network Architecture NKN Link 1 NKN LINK 2 Edge Router Outer Switch Edge Router Firewall with IPS-active Firewall with IPS- Standby DHCP server core switch 3 rd F 2 nd F Sever Switch 10G Fibre Distribution switch 1 st F Gnd F 10G backbone 3 rd F 2 nd F Distribution 1 st F Switch CAT 6a / 7 Gnd F 1/7/ rd Annual workshop 1G Fibre 4
5 Security Devices Firewall/IPS integrated Stateful Inspection Firewall Maximizes network security with clear, deterministic L3/L4 policies Reputation-based Intrusion Prevention.Identify the source of and block denial of service (DoS), distributed denial of service (DDoS), SYN flood, threat protection up to Layer 7. Zero-Day Protection with Anomaly Detection The Adoption and use of IPv6 Remote Access VPN solution, provide VPN client and clientless access. 1/7/ rd Annual workshop 5
6 Some of the Best Practices Campus Security Switch should support Dynamic port security, DHCP Dynamic ARP inspection, IP source guard Use SSH to access devices instead of Telnet Enable AAA and roles-based access control (RADIUS/TACACS+) for the CLI on all devices Enable SYSLOG to a server. Collect and archive log When using SNMP use SNMPv3 Configure access-lists to limit who all can access management and CLI services Enable control plane protocol authentication where it is available 1/7/ rd Annual workshop 6
7 Layer 2 Snoop Attack 400,000 Bogus MACs per Second 00:0e:00:aa:aa:aa 00:0e:00:bb:bb:bb Only Three MAC Addresses Allowed on the Port: Shutdown Problem: Solution: Flood Switch CAM Tables with Bogus Macs; Turning the VLAN into a Hub and Eliminating Privacy Port Security Limits MAC Flooding Attack and Locks Down Port and Sends an SNMP Trap 1/7/ rd Annual workshop 7
8 DHCP Snooping s of DHCP Requests to Overrun the DHCP Server 2 DHCP Server DHCP requests (discover) and responses (offer) tracked Rate-limit requests on trusted interfaces; limits DoS attacks on DHCP server Deny responses (offers) on non trusted interfaces; stop malicious or errant DHCP server 1/7/ rd Annual workshop 8
9 AAA server Supports Compliance Enables corporate governance through consistent access policy for all users and devices Strengthens Security Enforce consistent security policy, ensure endpoint health, deliver a secure network fabric Increases Efficiency Reduces IT overhead through centralized identity management and integrated policy enforcement 1/7/ rd Annual workshop 9
10 Multi-Homing Basic requirement IP numbers to be owned ( V4 or V6) ASN number ( 16 Bit or 32 Bit) Service Providers capable of doing BGP Router Capable BGP and Holding the routes Trained Manpower 1/7/ rd Annual workshop 10
11 1/7/ rd Annual workshop 11
12 What is an MPLS-VPN? An IP network infrastructure delivering private network services over a public infrastructure Use a layer 3 backbone Scalability, easy provisioning Global as well as non-unique private address space QoS Controlled access Easy configuration 1/7/ rd Annual workshop 12
13 1/7/ rd Annual workshop 13
14 NKN MPLS for CUG DC Cloud State Router NKN BACKBONE Each Sub-Interface associated with different VPN Institute #2 VLAN1-VPN Green VLAN2-Blue LAN of #2 v State TN VLAN3-Red LAN of #1 Contents of RED Institute #1 VLAN1-VPN Green v Contents of VPN Green Contents of Blue VLAN2-Blue Video/ Audio Intra-vpn Internet v Multi-VRF 802.1Q 1/7/ rd Annual workshop 14
15 Layer 2 Extensions 1/7/ rd Annual workshop 15
16 #3 #2 VC Equipment End to End QoS #4 #5 #7 #8 #9 VC Equipment #6 #10 #11 1/7/ rd Annual workshop 16 VC Equipment
17 Inter Service Provider QoS A C B D A C B E D MPLS VPNs Many QoS-enabled islands No interprovider QoS The Internet Richly interconnected providers No QoS A B C D E Goal: richly connected AND QoS-enabled 1/7/ rd Annual workshop 17
18 Defense Depth and Breadth Security Edge Network Operations Center (NOC) Transit Interface ACLs Unicast RPF Flexible packet matching IP option filtering Marking/rate-limiting Routing techniques ebgp techniques ICMP techniques Internet X X X X Edge Internet X Remote Access Systems , Web Servers Core Enterprise Network NKN Core Network Internal Assets, Servers 1/7/ rd Annual workshop 18 AS1 AS2 Receive ACLs AS3 CoPP ICMP techniques Transit QoS techniques Routing techniques Disable unused services Protocol specific filters Password security SNMP security Remote terminal access security System banners AAA Network telemetry Secure file systems
19 Using Strict Mode urpf to Battle BGP Trigger Community SRTBH on NKN Partner Edge BOTNETs ISP Target ISP ISP ISP NOC NKN Backbone urpf Strict On NKN Partner Edge Access POP Access POP Access POP Access POP Access POP NKN Partner NKN Partner NKN Partner NKN Partner NKN Partner NKN Partner NKN Partner NKN Partner NKN Partner NKN Partner NKN Partner 1/7/ rd Annual workshop 19
20 Utilization of Few Members INSTITUTE-1 INSTITUTE-2 1/7/ rd Annual workshop 20
21 INSTITUTE-3 INSTITUTE-4 1/7/ rd Annual workshop 21
22 High Packet Per Sec DoS ATTACK 1/7/ rd Annual workshop 22
23 HIGH BANDWIDTH DoS ATTACK 1/7/ rd Annual workshop 23
24 GATEWAY STATS 1/7/ rd Annual workshop 24
25 RELAY SERVICE 1/7/ rd Annual workshop 25
26 DNS Cache Servers Reply NKN Cloud Reply Request The server IP is (anycast) Contact us: 1/7/ rd Annual workshop 26
27 DNS Zone Servers Reply NKN Cloud Reply DNS Root Servers Institute Zone Reply transfer to NKN DNS Internet Domain.ac.in 1/7/ rd Annual workshop 27
28 Thank You & Happy NKN Project Implementation Unit National Knowledge Network National Informatics Centre 3rd Floor, Block III, Delhi IT Park, Shastri Park, New Delhi CONTACT NKN: piu@nkn.in support@nkn.in 1/7/ rd Annual workshop 28
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