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Linux Network Administration Essentials
Module 7, Part 7 of linux Admin Essential

	This is part of http://www.linuxcbt.com/products_linuxcbt.php

	# Linux Network Administration Essentials - Module 7 * Discuss & demonstrate the usage of commonly used networking tools: * PING - Demonstrate PING flooding of remote hosts - ICMP Attack Techniques * PING - Cisco PIX Integration & Debugging of ICMP Echo Requests/Echo Replies * Traceroute - Cisco PIX Integration & provisioning of ICMP traffic types * MTR (PING & Traceroute functionality) plus Cisco PIX debugging of ICMP data flow * ARP * NETSTAT/LSOF * IFCONFIG * Route * DIG & NSLOOKUP * Whois * Who, w, wc, last, cat, grep, vi, pico, head, tail, etc. * Message of the day banners (MOTD), /etc/issue file (pre-login banner/display info.) # # Implement Dynamic Host Configuration Protocol (DHCP) services * Explain the various steps of the DHCP process * Configure global & scope-level DHCP options * Configure IP reservations based on layer 2 MAC addresses * Disable Cisco PIX DHCP services * Enable Linux DHCP services * Configure Windows 2003/XP/Linux clients to receive dynamic addresses from Linux # # Discuss Xinetd super server concepts and applications * Identify services controlled by Xinetd * Enable & disable Xinetd-controlled services & examine results * Implement access control on Xinetd controlled services * Implement Xinetd IP and port-level daemon redirection * Discuss Xinetd & TCP Wrappers relationship and dual-layer security benefits # # Implement Very Secure VSFTPD File Transfer Protocol (FTP) services * Implement anonymous FTPD * Implement user-level FTPD access * Implement FTPD banners * Disable anonymous access * Configure VSFTPD to run under the auspices of Xinetd super server for increased security * Implement bandwidth rate-limiting to control bandwidth usage # # Discuss Linux & Windows Integration via Samba * Install Samba support * Install Samba Web-based Administration Tool (SWAT) * Configure Samba file & print sharing * Evaluate access to Samba file & print server * Configure Samba Windows Internet Name Server (WINS) support * Evaluate Windows XP/2003 client access to Samba-WINS server # # Discuss the Network File System (NFS) concepts and Linux support * Implement the NFS daemon * Review /etc/exports parameters and options * Evaluate access to NFS exports * Implement NFS connectivity across a WAN connection via IPSEC VPN-connectivity # # Discuss the CRON scheduling system concepts and application * Identify various predefined CRON entries and schedules * Define custom cron jobs system-wide * Define custom cron jobs user-wide * Evaluate results of cron jobs # # Implement the Berkeley Internet Daemon (BIND) Domain Name Server (DNS) * Implement BIND 9.x * Configure BIND as a caching-only DNS server * Test caching-only name resolution from Windows 2003 & Linux hosts * Secure access to caching-only/recursive name server via ACLs * Configure BIND as a primary DNS server * Test primary name resolution from Windows 2003 & Linux hosts * Configure BIND as a secondary(slave) DNS server * Restrict communications between primary & secondary DNS servers * Implement updates between master and secondary DNS servers via IPSEC VPN * Configure DNS zones on Linux BIND & Windows 2003 DNS - activate replication * Implement poor man's load balancing using DNS round robin * Evaluate results of BIND configuration using DIG * Configure DNS zones * Configure zone transfers * Configure secure-zone transfers * Evaluate BIND's configuration files named.conf & named.custom * Configure BIND sub-domain delegation. i.e. internal.linuxcbt.net * Configure BIND to support reverse domains * Configure Linux/Windows 2003 clients to use Linux BIND DNS server * DNS Transaction Signatures (TSIG) implemenation * Identify BIND logging information for troubleshooting purposes * Configure BIND DNS with IP Aliasing (Sub-Interfaces) to host DNS on separate IP address # # Implement Network Monitoring & Graphing tools using SNMP, etc. * Implement Multi Router Traffic Grapher (MRTG) * Graph Cisco Firewall with MRTG * Implement Cacti Network Graphing Tool * Download and Install Cacti and required components (RRDTool, MySqL, etc.) * Explore Cacti Interface, options, etc. * Graph Cisco, Linux & Windows 2003 resources with Cacti using SNMP & Scripts # # Implement Network Time Protocol (NTP) & Time Synchronization services for local subnets * Discuss features and distributed nature of the hierarchial NTP service * Ascertain and select optimal Stratum 1 NTP servers for synchronization * Review default NTP configuration * Configure NTP to synchronize with NTP servers * Configure internal Linux clients to syncrhonize with internal Stratum 2 NTP server * Configure Cisco PIX firewall to synchronize with internal Stratum 2 NTP server * Use NTP-related tools such as NTPQ, NTPTRACE to ascertain NTP-related information

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