[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [X] [Z] Nagios configuration files contactgroups.cfg file contacts.cfg file examples of host.cfg hostgroup.cfg nagios.cfg services.cfg plug-ins, downloading and installing name server, attacker scans for vulnerable versions of BIND named policy (systrace) NAT (network address translation) provided by Internet gateway randomizing IP IDs to prevent counting of machines on network Nessus security scanner brute-force logins to services clients for generating certificate for hosts, scanning port scans, options for reports on scans vulnerability types, selecting Net::PcapUtils Perl module Net::RawIP Perl module Net::SSLeay module NetBIOS name, specifying for remote system Netfilter chains iptables command libipq library MAC filtering with rule order saving all rules stateful packet-inspection engine web site for downloads NetPacket Perl module netstat program 2nd network intrusion detection systems (NIDS) [See intrusion detection] network monitoring auditing network traffic collecting statistics with firewall rules contact groups for hosts contacts for notification messages graphing trends hosts, configuring for ntop, running for real-time statistics remote monitoring with rpcapd services network owner, finding network security checker for Windows [See HFNetChk tool] network segment, scanning under Windows network time protocol (NTP) NFS, security problems with NIDS (network intrusion detection systems) [See intrusion detection] Nmap detecting operating system with fooling by emulating another operating system inventorying your network running on IP addresses handled by honeyd nobody account (Apache) nodev, noexec, and nosuid flags (mount) NOPASSWD: flag (sudo) ntop tool NTP (network time protocol) Ntsyslog configuration program, using number registries for IP address blocks |