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Ubuntu For Intranet Services
1. Ubuntu for Intranet Services This work is licensed under the Creative Commons Attribution-Share Alike 3.0 Philippines License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/ph/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA. By Dominique Gerald Cimafranca [email_address]
13. DNS queries Who is www.internal.com? Who is www.external.com? Who is www.external.com? It's 54.189.12.11. It's 192.168.11.1. It's 54.189.12.11.
14. Example DNS zone file ; ; BIND data file for local loopback interface ; $TTL 604800 @ IN SOA ns.example.com. root.example.com. ( 2 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS ns.example.com. @ IN A 127.0.0.1 ns IN A 192.168.1.10 www IN A 192.168.1.11
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17. DHCP interaction D'oh! My MAC address is 48:24:AC:33:03:21. Who am I supposed to be? You are 192.168.11.15. Your DNS server is 192.168.11.1. Your default gateway is 192.168.11.254.
22. MTA operation This message is meant for buboy@internal.com. Cool. I'll keep it in his mailbox here. This message is meant for gaga@external.com. Okay. I'll send it to the mail server of external.com.
23. How about email from outside? External Mail Server Internal Mail Server Okay. I'll keep it here. This message is meant for buboy@internal.com. Fetchmail It's 9:00. I'm collecting all the email you got.
52. Ubuntu for Intranet Services This work is licensed under the Creative Commons Attribution-Share Alike 3.0 Philippines License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/ph/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA. By Dominique Gerald Cimafranca [email_address]