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Network Services Geoff HUSTON. IP Access is not enough zAn ISP service also requires: ymail & mailing lists yDNS yweb yusenet yftp y...

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Presentation on theme: "Network Services Geoff HUSTON. IP Access is not enough zAn ISP service also requires: ymail & mailing lists yDNS yweb yusenet yftp y..."— Presentation transcript:

1 Network Services Geoff HUSTON

2 IP Access is not enough zAn ISP service also requires: ymail & mailing lists yDNS yweb yusenet yftp y...

3 Mail Services Mail Server Mail Alias Local Access Account Secondary Mail Server Inbound Mail delivery Backup Mail Client POP or IMAP Access to Mail Account Outgoing Mail server Outbound Mail Server Outbound Mail

4 Mail Services zCustomer mailboxes ySMTP server yPOP / IMAP access server yaccount management yalias management

5 Mail Services zSMTP relay for outbound mail zSecondary MX for customers zMail List management for customers

6 DNS Services zHosting Primary Domain Service zSecondary DNS Server zDNS Forwarder

7 Web Caching zimproved fetch performance zISP cost reduction zvirtual web servers (virtual domains) zproxy servers zaccepting advertisements on the web page

8 Caching GET cache GET cache 1 2

9 Large Scale Caching ISP Network cache server client cache cache cache cache server client cache server client ICP requests Core Cache System

10 POP Cache Architecture Core Network to customer sites Access Servers LAN Switches Servers Core Router Cache Redirect TCP port 80 requests to local cache system

11 Web Hosting zVirtual web hosts sub 11 sub 121 sub 12 sub 1sub 2 sub 31 sub 321sub 322 sub 32sub 33 sub 3 sub 4 user page sub 11 sub 121 sub 12 sub 1sub 2 sub 31 sub 321sub 322 sub 32sub 33 sub 3 sub 4 user page sub 11 sub 121 sub 12 sub 1sub 2 sub 31 sub 321sub 322 sub 32sub 33 sub 3 sub 4 user page sub 11 sub 121 sub 12 sub 1sub 2 sub 31 sub 321sub 322 sub 32sub 33 sub 3 sub 4 user page

12 USENET servers zcan be a valuable service zcan be expensive! ytoo much traffic getting-in ytoo much hard disk capacity ymaintenance cost a lot!

13 Games and Entertainment zThe Internet is not intended to be serious and theres a perfectly good market for games and entertainment yGame servers yStreaming audio/video servers y…

14 Upstream ISP Upstream Feed RouterLocal Office Access Router Network Access Server Access Filters Radius Server Mail Server DNS Server WWW Cache WWW Server Usenet Server Accounting Data Network Management Server Local Office

15 45Mbps Backbone Radius Server Mail Server DNS Server WWW Cache WWW Server Usenet Server Accounting Data Network Mgmt Server Dial-Up Network Access Server Network Client Access Router Network Client Access Router Backbone Router

16 622MbpsSONET Backbone Dial-Up Network Access Servers Network Client Access Routers Backbone Router Add Drop Mux Fast Ethernet Switch Radius Server Mail Server DNS Server WWW Cache WWW Server Usenet Server Accounting Data Network Mgmt Server 155Mbps Fiber Connectors

17 Adding Security to the Design Network Router Local Office Access Router Network Access Server Radius Server Mail Server DNS Server WWW Cache WWW Server Usenet Server Accounting Data Network Management Server Service Plane Control and Management Plane

18 Network Management Server Upstream Feed RouterLocal Office Access Router Network Access Server Radius Server Mail Server DNS Server WWW Cache WWW Server Usenet Server Accounting Server Local Office Network Carriage Plane TCP logging SYN protection permit any source connect to TCP port 119 permit NetOpsCenter source to any port deny all else no loose source routing no directed broadcast permit any source to usenet server TCP port 119 permit NetOpsCenter source to usenet server deny all else ISP Service Plane Example: Securing the Usenet Server ISP Management Plane

19 Service Issues zDo ISP services attract a different tariff? zHow are service ports accounted?


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