hack proofing linux a Guide to Open Source Security phần 3 pot

... scans. www.syngress.com Figure 3. 19 Viewing a Small LAN in Cheops 138 _linux_ 03 6/20/01 9 :36 AM Page 156 System Scanning and Probing • Chapter 3 141 application, such as Cheops or an IDS to generate a network map. See later ... 6/20/01 9 :35 AM Page 124 152 Chapter 3 • System Scanning and Probing ■ The ability to add an entire IP network or DNS domain to the map, and then...

Ngày tải lên: 08/08/2014, 21:23

... to Open Source Security ™ 1 YEAR UPGRADE BUYER PROTECTION PLAN Linux: A Guide to Open Source Security The Only Way to Stop a Hacker Is to Think Like One James Stanger Patrick T. Lane 138 _linux_ FM ... One-way encryp- tion is also used to read a file and then create a hash of that file.The resulting hash value is said to be mathematically unrecoverable. You s...

Ngày tải lên: 08/08/2014, 21:23

... Bastille is written specifically to Red Hat Linux and Mandrake Linux. The specific Red Hat/Mandrake content has been generalized, and hard-code filenames are now represented as variables. These variables ... down- load and install the security upgrades to avoid denial-of-service (DoS) and intrusion attacks that can result from these weaknesses. For example, a security update can be...

Ngày tải lên: 08/08/2014, 21:23

... creates its database, it is said to enter database initialization mode. 5. You can then set Tripwire to rescan these files and compare their signa- tures to the signatures stored in the database.This ... generally extends your logging capability by placing additional information into a log file or into a database. Alerting An IDS often has the ability to send alert messages to...

Ngày tải lên: 08/08/2014, 21:23

... Snort’s analysis feature is able to read the contents of the captured packets and then inform you about any attacks waged against your network. ; Snort is able to automatically detect attacks based ... directories, and databases. ; An IDS can act as a supplement to a firewall, because it can help you monitor traffic on the internal network. Sometimes it may be useful to place an IDS...

Ngày tải lên: 08/08/2014, 21:23

... and /var/kerberos/krb5kdc/kdc.acl files to reflect your Kerberos realm and DNS domain names.You must then add an administrative user, as well as additional principals, to the database. Using kadmin.local Because ... klist, and kdestroy applications, because you can use it to view, delete, and obtain credentials. www.syngress.com 138 _linux_ 06 6/20/01 9: 43 AM Page 33 3 36 4 Chapter 7...

Ngày tải lên: 08/08/2014, 21:23

... Red Hat Package Manager (RPM) packages are already installed (you may need to update them later in this section). To check if an RPM is installed, enter rpm -qa | grep rpm_name .To install an RPM, ... time and trouble by acquiring FreeS/WAN through one of these alternate sources. Some available script sets are designed to allow you to manage firewalls that also serve as FreeS/WAN IPSe...

Ngày tải lên: 08/08/2014, 21:23

... firewall can take action. Some actions the firewall can take may include automatic firewall reconfiguration and automatic alerts. Exercise: Using Firestarter to Create a Personal Firewall 1. Make ... Implementing a Firewall with Ipchains and Iptables Using and Obtaining Automated Firewall Scripts and Graphical Firewall Utilities Several attempts have been made to automate the process of...

Ngày tải lên: 08/08/2014, 21:23

... rules database One of the common moves by a hacker is to alter the rules database in subtle ways that make it easier for the hacker to gain access to the network. Check your rules and compare them ... Frequently Asked Questions Chapter 11 5 43 138 _linux_ 11 6/20/01 9:51 AM Page 5 43 Maintaining Firewalls • Chapter 11 549 employee morale. Make sure that upper management understands...

Ngày tải lên: 08/08/2014, 21:23

... 30 6, 30 9 opiepassword command and, 30 5, 30 6, 30 7 30 8 OTP via FTP and, 30 6, 31 8 31 9 password format, 30 8, 30 9 response generation, 30 9, 31 3, 31 4 31 5 troubleshooting, 30 7, 34 8 uninstalling, 31 2 user ... firewall-related, 549 make command, 11 makefiles, tarball, 10, 11 Makinen,Tuomo, 147 malware, open source software as, 8–9 man-in-the middle attacks, 30 1 3...

Ngày tải lên: 08/08/2014, 21:23