Wrapup Overview First half Last half First half

First Half • Shells ▫ ▫ ▫ What is a shell and what does

First Half • Utilities and Filters ▫ ▫ ▫ What are filters and why

First Half • Scripting ▫ Centered on BASH ▫ Basic operators (conditionals, if, test,

First half • NTP ▫ Centralized clock ▫ Many networked programs need a synchronized

First half • SSH • DNS ▫ DNSSec • Distributed File Systems ▫ ▫

First Half • System Auditing ▫ ▫ ▫ Run levels Services/Daemons iptables permissions Account

Last Half • Network Auditing ▫ hardware roles (hubs, switches, routers, etc. ) ▫

Last Half • AWK ▫ who named for ▫ how to spell ▫ basic

Last half • User Management ▫ Keberos • LDAP ▫ Good as standalone ▫

Last Half • Replication ▫ Types: Primary/backup Master/Slave Multi-master • Load Balancing ▫ What

Last Half • System Administration ▫ sudo ▫ special attributes (suid, guid, sticky bit)

Last Half • SNMP ▫ basics of protocol ▫ security concerns Most common version

Last Half • Configuration Management ▫ What is supposed to be on the systems

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Wrapup

Overview First half Last half

First half

First Half • Shells ▫ ▫ ▫ What is a shell and what does it do Most popular shells Redirection shell variables environment export and environment

First Half • Utilities and Filters ▫ ▫ ▫ What are filters and why to use them Filter examples (tail, diff, etc) Basics of regular expressions grep sed

First Half • Scripting ▫ Centered on BASH ▫ Basic operators (conditionals, if, test, case, for, while, here docs, trap, signals, etc)

First half • NTP ▫ Centralized clock ▫ Many networked programs need a synchronized clock • Syslog ▫ Need a common clock when monitoring errors on a network

First half • SSH • DNS ▫ DNSSec • Distributed File Systems ▫ ▫ NFS SMB SAN NAS • RAID

First Half • System Auditing ▫ ▫ ▫ Run levels Services/Daemons iptables permissions Account management • System Hardening ▫ basic practices ▫ vulnerability databases

Last Half

Last Half • Network Auditing ▫ hardware roles (hubs, switches, routers, etc. ) ▫ Tools (ping, nmap, wireshark, etc. ) • Network Hardening ▫ ▫ firewalls dhcp hazards rogue devices vpn roles

Last half • Wireless I and II

Last Half • AWK ▫ who named for ▫ how to spell ▫ basic use $n is the field on a line blank is default delimiter what is default std out role of BEGIN and END

Last half • User Management ▫ Keberos • LDAP ▫ Good as standalone ▫ Better when teamed with another product • e. Mail ▫ TLS ▫ SPF Verifies a domains valid mail servers Does not validate content

Last Half • Replication ▫ Types: Primary/backup Master/Slave Multi-master • Load Balancing ▫ What is it Round Robin Reverse Proxies ▫ Differences ▫ How to do

Last Half • System Administration ▫ sudo ▫ special attributes (suid, guid, sticky bit) ▫ booting basics ▫ ▫ init device files file systems tar, compress, gzip and zip package management Why?

Last Half • SNMP ▫ basics of protocol ▫ security concerns Most common version Most secure version

Last Half • Configuration Management ▫ What is supposed to be on the systems ▫ What IS on the systems • Security Policies ▫ Procedures ▫ Objectives Confidentiality Integrity Availability