108

H

K

hacker ethic, 17

Kerberos

hackers

NIS, 50

black hat

(See cracker)

definition, 17

L

grey hat, 17

legal issues, 96

white hat, 17

lpd, 40

hardware, 75

lsof, 56

and security, 78

laptops, 78

servers, 78

M

workstations, 78

md5sum, 98

I

N

IDS

Nessus, 85

(See intrusion detection systems)

Netfilter, 68

incident response, 95

additional resources, 73

and legal issues, 96

Netfilter 6, 72

collecting evidence, 97

netstat, 56

computer emergency response team (CERT), 96

network services, 40

creating a plan, 95

identifying and configuring, 40

defining, 95

risks, 40

gathering post breach information, 97

buffer overflow, 40

implementation, 96

denial of service, 40

investigation, 97

script vulnerability, 40

post mortem, 97

network topologies, 75

reporting the incident, 100

linear bus, 75

restoring and recovering resources, 99

ring, 75

incident response plan, 95

star, 75

insecure services, 41

networks, 75

rsh, 42

and security, 75

telnet, 42

de militarized zones (DMZs), 77

vsftpd, 42

hubs, 76

wu ftpd, 42

segmentation, 77

introduction, v

switches, 76

other Red Hat Linux manuals, v

wireless, 76

topics, v

NFS, 50

and Sendmail, 55

intrusion detection systems, 89

network design, 50

and log files, 89

syntax errors, 51

defining, 89

NIS

host based, 89

introducing, 48

network based, 92

iptables, 50

Snort, 93

Kerberos, 50

RPM Package Manager (RPM), 90

NIS domain name, 49

Tripwire, 90

planning network, 49

types, 89

securenets, 49

ip6tables, 72

static ports, 50

iptables, 68

nmap, 56, 83

additional resources, 73

command line version, 83

using, 68

graphical version, 84