Practical Unix & Internet Security, 3rd Edition

By Alan Schwartz

When Practical Unix Security was once first released greater than a decade in the past, it turned an fast vintage. full of information regarding host safeguard, it kept many a Unix approach administrator from catastrophe. the second one variation extra much-needed net protection insurance and doubled the scale of the unique quantity. The 3rd variation is a finished replace of this very hot e-book - a significant other for the Unix/Linux method administrator who must safe his or her organization's approach, networks, and internet presence in an more and more adverse world.Focusing at the 4 most well liked Unix variations today--Solaris, Mac OS X, Linux, and FreeBSD--this booklet includes new details on PAM (Pluggable Authentication Modules), LDAP, SMB/Samba, anti-theft applied sciences, embedded structures, instant and desktop matters, forensics, intrusion detection, chroot jails, mobile scanners and firewalls, digital and cryptographic filesystems, WebNFS, kernel protection degrees, outsourcing, felony concerns, new net protocols and cryptographic algorithms, and masses more.Practical Unix & web Security comprises six parts:

  • Computer defense fundamentals: advent to safeguard difficulties and options, Unix background and lineage, and the significance of protection guidelines as a simple part of procedure security.
  • Security construction blocks: basics of Unix passwords, clients, teams, the Unix filesystem, cryptography, actual safeguard, and team of workers security.
  • Network defense: a close examine modem and dialup defense, TCP/IP, securing person community providers, Sun's RPC, numerous host and community authentication structures (e.g., NIS, NIS+, and Kerberos), NFS and different filesystems, and the significance of safe programming.
  • Secure operations: maintaining up to now in cutting-edge altering defense international, backups, protecting opposed to assaults, acting integrity administration, and auditing.
  • Handling protection incidents: researching a break-in, facing programmed threats and denial of provider assaults, and criminal elements of laptop security.
  • Appendixes: a entire defense record and a close bibliography of paper and digital references for additional examining and research.

Packed with a thousand pages of precious textual content, scripts, checklists, advice, and warnings, this 3rd version continues to be the definitive reference for Unix directors and a person who cares approximately maintaining their structures and knowledge from state-of-the-art threats.

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If humans did have an identical username on a unmarried process, then they might quite be sharing an identical account. ) generally, Unix passwords have been additionally among one and 8 characters lengthy, even though so much Unix platforms now let longer passwords in addition. Longer passwords are often safer simply because they're tougher to wager. multiple consumer can theoretically have an analogous password, even if in the event that they do, that sometimes shows that either clients have picked a nasty password. A username might be any series of characters you will have (with a few exceptions), and doesn't unavoidably correspond to a true person’s identify.

All rights reserved. there's one distinctive UID, that is UID zero. this can be the UID that's reserved for the Unix superuser. The Unix kernel disables such a lot protection assessments whilst a approach is being run through a person with the UID of zero. there's in most cases not anything detailed approximately any Unix account identify. All Unix privileges are made up our minds by way of the UID (and occasionally the crowd identity, or GID), and never without delay by means of the account identify. hence, an account with identify root and UID 1005 may haven't any distinct privileges, yet an account named mortimer with UID zero will be a superuser.

456 realizing NFS Server-Side NFS defense Client-Side NFS protection enhancing NFS safety a few final reviews on NFS realizing SMB 457 468 473 474 483 485 sixteen. safe Programming options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 498 One computer virus Can smash all of your Day... tips about averting Security-Related insects tips about Writing community courses pointers on Writing SUID/SGID courses utilizing chroot( ) pointers on utilizing Passwords pointers on producing Random Numbers 498 505 514 516 519 520 522 half IV.

230 heritage exams at the activity Departure people 231 233 236 237 half III. community and web defense 10. Modems and Dialup defense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Modems: conception of Operation Modems and protection Modems and Unix extra safeguard for Modems 242 246 257 265 eleven. TCP/IP Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267 Networking IP: the net Protocol IP safeguard 267 271 290 12. Securing TCP and UDP providers .

All rights reserved. | ninety three LDAP LDAP is used to construct a real community authentication method; instead of create neighborhood /etc/passwd entries, structures that use LDAP for authentication are configured to ascertain logins opposed to the network’s LDAP server every time (though a few configurations do contain a reputation service–caching daemon* [nscd] that caches LDAP responses in the neighborhood to minimize the variety of community authentications required). LDAP is roofed intimately in bankruptcy 14. Pluggable Authentication Modules (PAM) simply because there are such a lot of how one can authenticate clients, it’s handy to have a unified method of authentication which may deal with a number of authentication platforms for various wishes.

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