index_L

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lastcomm command (process accounting) 
lastlog files (altered), detection by chkrootkit 
lcap utility 
ldd command 
libdnet 
libevent 
libipq library (Netfilter) 
libnet packet injection library  2nd  3rd 
libol library package 
libpcap  2nd 
libraries
    C library calls supported by Unix 
    GMP (GNU multiple precision math librry) 
LibSafe, protecting against buffer overflows 
limits.conf file (pam_limits module) 
Linux
    /etc/pam.d contents on RedHat Linux system 
    binary formats used by 
    bypassing noexec option for fileysytem mount 
    capabilities model, modifying 
    grsecurity kernel patch 
    IPsec connections, configuring 
    kernel support for IP queue 
    LibSafe technology 
    listening ports and their owning processes, listing 
    Netfilter 
    Sebek honeypot monitoring module 
    system update package (AutoRPM) 
    tunneling with VTun and SSH 
list open files (lsof) utility 
listening services, checking for 
    listing listening ports and owning processes with sockstat 
    lsof utility, using 
    netstat program, using on BSD 
    netstat program, using on Linux 
log files, protecting from tampering 
log levels for syslog facilities 
logging 
    aggregating logs from remote sites 
    Barnyard, used with Snort 
    changing maximum log file size (on Windows) 
    filesystem mounting with grsecurity 
    integrating Windows into syslog 
    monitoring logs automatically 
    network traffic audit with Argus 
    running central syslog server 
    securing Windows event logs 
    Snort NIDS 
        unified output format  2nd 
    SnortSam 
    Spade IDS 
    summarizing logs automatically 
    syslog, filtering information into separate files 
    user activity with process accounting 
login access, controlling with PAM 
login keys for SSH 
logins
    quick, using SSH client keys 
        security concerns with public keys 
logon event auditing (Windows) 
logwatch tool 
loopback interface
    keeping unfiltered (PacketFilter) 
    removing filtering from 
ls -l command 
lsof (list open files) utility 
LZO compression