o Pa Ali Nyang				-	KENYA	   
o Ghislain Nkeramugaba			-	Rwanda	   
o Kwabena Gyekye-Koranteng		-	GHANA	   
o Jeng	Njie				-	Gambia	   
o Nicholas Wambui Muchiri		-	KENYA	   
o Jainaba Sissoho			-	Gambia	   
o Seidu	Njie				-	Gambia	   
o Njemmeh Jeng Njie			-	Gambia	   
o Ousainou Darboe			-	Gambia	   
o Momodou Alieu	Jallow			-	Gambia	   
o Fanta	Bouba				-	TCHAD	   
o Momodou Lamin	Sanyang			-	Gambia	   
o Aminayanasam	Omineokuma		-	Nigeria
o Kumba	kuyateh				-	Gambia	   
o Greystone Chakhumata			-	Malawi	   
o Pa Lamin Jobarteh			-	Gambia	   
o Abdoulie Faal				-	Gambia	   
o Lama	Jallow				-	Gambia	   
o Ayodeji Ojo				-	NIGERIA	   
o Malick JOBE				-	Gambia	   
o Christian Ahiauzu			-	NIGERIA	   
o Lamin K. Sonko			-	Gambia	   
o Yahaar Ndow				-	Gambia	   
o Ousainou Darboe			-	Gambia	   
o Samba	Njie				-	Gambia	 
o Tlali Mamothokoane			-	LESOTHO	 

### Introduction Frank Kuse ### DNS Joe Abley #### Fundamentals Goal: to understand overall purpose and structure of DNS + IP addresses vs. names + DNS as a distributed, hierarchical database + Domain names and resource records: - A, PTR, MX, CNAME, TXT, SOA/NS + Domain name lookup responses + Reverse DNS + DNS as client-server model - Resolver - Cache - Authoritative server + Testing DNS (dig) + Understanding output from dig + Practical Exercises: - Configure Unix resolver - Use dig { A, other (e.g. MX), non-existent answer, reverse lookup } - Use tcpdump to show queries being sent to cache #### DNS Caching and Debugging Goal: to understand operation of a recursive nameserver + Recap of previous session + DNS as a distributed database. + Resource record NS: referral of answer + Caching nameserver and root servers + Caching used to reduce load (esp. top level servers) + Issue of stale data in caches (problems with distributed systems). - TTL records on each record - Negative TTL in SOA + Recursion and caching (dig +norec) + Demo: www.ticscali.co.uk + Practical Exercise: - Debugging DNS Worksheet (with dig +norec ): . Students work on their own examples + Configuring a caching nameserver - check /var/named/etc/namedb/named.conf - run tcpdump - rndc start - change /etc/resolv.conf to point to your nameserver - query two times - { Look at 'aa' flag, TTL, query time } - rndc flush - cache is authoritative for 127.0.0.1 + What sort of hardware would you choosing when building a DNS cache? + Improving the configuration of a cache NS + Managing a caching nameserver + Practical Exercise: - Building your own cache nameserver - Improving the configuration of the cache NS + Question and Answer session + Summary #### Configuring Authoritative Name Servers Goal: to properly configure an authoritative nameserver + Recap of caching NS + DNS Replication + Outside world cannot tell the difference between master and slave + When does replication take place? + Two (2) Dangers with serial numbers + Configuration of Master & Slave NS - Format of Resource Records { SOA and NS } + Ten (10) Common DNS Operational and Configuration Errors (RFC1912) #### Exercises Setting up authoritative name services for a domain + Master & Slave nameserver exercises #### Delegation and Reverse DNS + How do you delegate a subdomain? + Glue records + Reverse DNS - Subnets smaller than /24 + DNS Landmarks - Key organisations and people + The Root Zone + Top-Level Domains - Generic and Country Code TLDs + Registries, Registrars, Registrants + Nameserver Vendors + Conferences, Industry Groups + Mailing Lists + DNS Summary + Further reading ### DNSSEC Joe Abley DNSSEC High Level Awareness ### RADIUS Frank Kuse ### Apache Kevin Chege + Installing Apache22 from FreeBSD ports + Configure Apache with basic configuration + Start Apache httpsd daemon and connect to local box + Verify local ssl certificate works + Configuring Apache with SSL + Example SSL Apache configuration file + Sample config for Virtual Hosting ### Virtualization Joel Jaeggli ### Load Balancing Joel Jaeggli ### Backup Chris Wilson + Why bother with backups? + User error + Major disaster + Different requirements + Complicating factors + The plan + Backing up everything + Types of backups - Full, Differential, Incremental + Backing up files and systems + Software options - FreeBSD UFS snapshots - rsync . local and remote - tar - dump - Amanda server - duplicity ### Monitoring Brian Candler ### Exim Chimwemwe Frederick + Email Introduction + How Email Appears to Work + How Email Really Works + Mail User Agent (MUA)‏ + Mail Delivery Agent (MDA) + Mail Transfer Agent (MTA)‏ + Email Queue + MTA to MTA Transfer + DNS resolution and transfer process + Delivery + Troubleshooting Email Issues + RFCs + Exim Introduction + What is Exim? + Who uses Exim? + Why use Exim? + Why not to use Exim? + Installing Exim + The Exim Game Chris Wilson Exim and Internet Mail + What is Exim? + Who uses Exim? + Why use Exim? + Why not to use Exim? + Root and sudo + Exim Overview + SMTP commands and Access Control + Queueing and bouncing + Backup/secondary mail exchangers + The Exim configuration file + Global settings + Relaying for domains and hosts + Sending your first email (by hand) ### Mail Michuki Mwangi #### Dovecot with Virtual Users + Dovecot - Server for POP and IMAP - What is Dovecot? - Installing dovecot from ports - Configuring Dovecot #### Webmail using Squirrelmail #### Scaling mail services + Mailserver scalability - Linear password files - Linear mbox files - Too many files in one directory - CPU limits - Disk performance - Keep your SMTP (smarthost) and POP3 services separate + Notes and Clustering and NFS - Using Network File System (NFS) - Using Proxies - Load balancing - Database backends - FreeBSD NFS ### Security and Availability Joel Jaeggli ### Closing Survey Joel Jaeggli