P
packet filters, checking configuration of, 51-55
PAM, 170-172
backing up the configuration, 174
BSD-like wheel groups, 178-179
configuration file format, 173-174
control flags, 173-174
framework, 175-176
module arguments, 174
module interface, 173
module path , 174
pam_chroot, 207-209
pam_passwdqc module, 180-183
per- user temporary directories, 179
recovering from catastrophic errors, 175
removing obsolete configuration files, 172
strong passwords, 179-183
traditional services, 176-178
passwords
enforcing strict requirements with PAM, 171
John the Ripper, 337-340
password checkers, 336-340
strong, 179-183
patches
central patch server, 318-319
monitoring and management, 319-321
SUSE, 296-303
up2date tool, 303-314
permissions
certificate, 279
modes, 130-131, 132-134
special directory permissions, 133
special file permissions, 133
Personal Information Protection and Electronic Documents Act, 368
pluggable authentication modules, 170-172
backing up the configuration, 174
BSD-like wheel groups, 178-179
configuration file format, 173-174
control flags, 173-174
framework, 175-176
module arguments, 174
module interface, 173
module path, 174
pam_chroot, 207-209
pam_passwdqc module, 180-183
per-user temporary directories, 179
recovering from catastrophic errors, 175
removing obsolete configuration files, 172
strong passwords, 179-183
traditional services, 176-178
ports
monitoring, 102-103
scanning, 45
SSH port forwarding, 222-224
POSIX, access control lists, 130-137
power
ensuring stability of, 12-13
protocols, 212
comparison, 213
IPSec, 228-235
SSH, 213-224
ps command, 45-46, 84
ps -ef, 102