Index_L

L

L2TP (Layer 2 Tunneling Protocol), 252

LAND attacks, 25

Language, general, 531

LANguard tool (GFI), 979

Large-packet ping attacks, 25

LAT. see Local Address Table (LAT)

Layer 2 Tunneling Protocol (L2TP), 252

LDAP. see Lightweight Directory Access Protocol (LDAP)

LDAP account management panel (FireWall-1), 521

LEDs, meanings of, 372

Left angle bracket (<), 321

Legacy mode. see ClusterXL (Check Point)

lib directory, 622

libpcap packet capture library, 1212–1215, 1217

License Repository, 522–523

Licenses

15-day trial period, 743

configuration of, 628–629

expired, 523

Server, ISA, installation of, 849

VPN-1/FireWall-1 NG, 423–424

VPN-1/FireWall-1 NG on Solaris, 466–467

VPN-1/FireWall-1 NG on Windows, 444–446

Licensing

DVMRP and IGRP routing protocols, 678

management of, 521

PIX 500 series firewalls, 259–261

Lightweight Directory Access Protocol (LDAP), 333–334, 512, 521, 530

Linux firewalls

anti-spoofing rules, 152–155

chains, user-defined, 139

connectivity, troubleshooting, 175

GUI tools, 159–160

Heimdall Linuxconf Firewall, 160

interface, specifying, 139–140

kernel, configuring, 137

logging tools, 207–208

logs, viewing with firelogd, 186–191

logs, viewing with fwlogwatch, 191–207

multiple terminals, 178

Netcat testing tool, 178–182

packet accounting, 137, 155–156

packet-filtering rules, 147

packet generators, 177

packets, logging, 146–147

policies, setting, 140–143

port scanners, 177

requirements, 131

rule checkers, 176

scripts, 159–160

SendIP packet forger, 182–185

tables and chains, 138

targets, built-in, 139

Telnet for testing, 177

testing, 172–173

type of service (ToS), 156–159

see also Ipchains; Iptables

Linux operating system

distributions, 1210–1212

installation, 1216–1217

Listening port, SSL, 1142

Literal port names, 286

Literal protocol names, 285

Load-balancing

ISA Server, 968–970

Windows 2000, 969

Load-sharing versus high availability, 715, 727

Local Address Table (LAT), 824–825, 851, 1007–1008

Local gateways, 583–584, 586–587, 593

Log and Alert panel (FireWall-1), 521

log directory, 622

Log Viewer tool, 524–525

logging command (PIX firewalls), 266

LogGrep log tool, 207

Logical server group, 501–502

login command (PIX firewalls), 265

Logins, failed, tolerance for, 520

logout command (PIX firewalls), 265, 266

Logs

checking, 382

extensive, 535

ISA Server, 819

maintaining, 623

minimizing, 409

performance, ISA Server, 958–961

viewing with firelogd, 186–191

Windows 2000 Event Viewer, 997–998

see also System logging, IPSO

Loopback address, 664