rdlc code 39

rdlc code 39

rdlc code 39

rdlc code 39

rdlc code 39

rdlc code 39,

rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,

rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,

rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,

Ethernet essentially places each host in its own collision domain, so that only traffic destined for specific hosts (and broadcast traffic) reaches the NIC, nothing more An added bonus to moving to switched networking is the increase in performance With the costs of switched equipment nearly equal to that of shared equipment, there really is no excuse to purchase shared Ethernet technologies any more If your company s accounting department just doesn t see the light, show them their passwords captured using one of the programs specified earlier they ll reconsider While switched networks help to defeat unsophisticated attackers, they can be easily subverted to sniff the local network A program such as arpredirect, part of the dsniff package by Dug Song (http://wwwmonkeyorg/~dugsong/dsniff/), can easily subvert the security provided by most switches See 10 for a complete discussion of arpredirect Detecting Sniffers There are two basic approaches to detecting sniffers: host based and network based The most direct host-based approach is to determine if the target system s network card is operating in promiscuous mode On UNIX, there are several programs that can accomplish this, including Check Promiscuous Mode (cpm) from Carnegie Mellon University (available at ftp://infocertorg/pub/tools/) Sniffers are also visible in the Process List and tend to create large log files over time, so simple UNIX scripts using ps, lsof, and grep can illuminate suspicious sniffer-like activity Intelligent intruders will almost always disguise the sniffer s process and attempt to hide the log files it creates in a hidden directory, so these techniques are not always effective Network-based sniffer detection has been hypothesized for a long time, but only until relatively recently has someone written a tool to perform such a task: AntiSniff from the security research group known as the L0pht (http://wwwl0phtcom/) Unfortunately, the first version runs only on Windows, but the technical underpinnings look sound enough to provide a central point from which to scan a network for promiscuous mode interfaces In addition to AntiSniff, sentinel (http://wwwpacketfactorynet/ Projects/Sentinel/) can be run from a UNIX system and has advanced network-based promiscuous mode detection features Encryption (SSH, IPSec) The long-term solution to network eavesdropping is encryption Only if end-to-end encryption is employed can near-complete confidence in the integrity of communication be achieved Encryption key length should be determined based on the amount of time the data remains sensitive shorter encryption key lengths (40 bits) are permissible for encrypting data streams that contain rapidly outdated data and will also boost performance Secure Shell (SSH) has long served the UNIX community where encrypted remote login was needed Free versions for noncommercial, educational use can be found at http://wwwsshorg/downloadhtml, while a commercial version called F-Secure Tunnel & Terminal is sold by Data Fellows, http://wwwdatafellowscom/ OpenSSH is a free open-source alternative pioneered by the OpenBSD team and can be found at wwwopensshcom.

When you print a worksheet, the default settings don t include the gridlines, column letters and row numbers, or page numbers For the times that you do want gridlines, column and row headings, and/or page numbers, it s easy enough to include them You simply need to open the Page Setup dialog box and choose the options on the Sheet tab, shown in Figure 14-4