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Other life-saving TCP/IP tools include these: • LOAD PING Standard ping (but you can ping multiple stations at a time) • LOAD IPTRACE Novell’s answer to traceroute Previous Table of Contents Next
Summary Previous Table of Contents Next Novell NDS is one compelling reason shops haven’t totally abandoned the Novell network operating system in favor of NT. A Novell server is nothing more than a fancy 32-bit DOS program, but its leanand-mean paradigm translates into you getting more oomph out of your hardware investment. The server program acts as a broker between the various NLMs that make the system work; therefore, the server itself is basically a conglomerate of NLMs. The modularity of the system also means that one malfunctioning NLM can ruin your whole day, but take heart—tools exist to manage what can seem to be a daunting NLM tracking and upgrading task. The Monitor can help you with tough troubleshooting jobs, because it keeps track of every resource available to the server. In addition to keeping track of server connections, it keeps track of memory and CPU resources, as well as what each NLM process utilizes. IPX/SPX is a reasonably easy protocol to configure, but most shops need TCP/IP. Both are configurable through INETCFG.NLM. TCP/IP applications can be configured through UNICON, and many statistics and internal tables can be viewed through the TCPCON. What’s more, Novell now includes standard tools such as PING and IPTRACE (traceroute) in its TCP/IP distribution. <strong>Workshop</strong> Q&A Q Why doesn’t Novell just get rid of the concept of ABENDs? A Every operating system, whether it’s UNIX (kernel panics) or NT (the Blue Screen of Death), has unrecoverable errors. It’s just the nature of the beast. Nobody wants an operating system to keep running after the foundation has been undermined. The thought is: it’s much better to reboot than to have to restore all the lost data due to the server not showing the good judgement to stop playing with the data. You can type the following command on your Novell server to make it reboot automatically after software ABENDs, which at least automates the recovery process most times (set it to 2 if you want it to reboot after hardware-related ABENDs, as well): SET AUTO RESTART AFTER ABEND=1
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To access the contents, click the c
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Workshop Q&A Quiz Answers to Quiz Q
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Eminent Domain TCP/IP Graffiti DHCP
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Configuring Your Proxy Proxy Troubl
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Socks Stuff AOL Instant Messenger A
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Table of Contents Introduction: Get
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about your more complex network iss
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Tell Us What You Think! Table of Co
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with me when I was first getting st
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NIC (network interface card) The te
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MAC Attack Previous Table of Conten
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Routers Previous Table of Contents
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technology as the future of local a
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for a TCP/IP address in a large net
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Sprechen Sie DLC? Previous Table of
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socket 80 of the TCP/IP address 167
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program in a name entry; entering t
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WINS Previous Table of Contents Nex
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kind and spit them out as fast as p
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Previous Table of Contents Next Hou
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Figure 2.1 A simple logical map. If
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Figure 2.4 A physical documentation
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the room). This way, you can read t
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un on the server at 9:50 on Monday
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Previous Table of Contents Next Par
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Beware of Vendor Your vendor probab
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call the risk/benefit ratio—the a
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Workshop Q&A Previous Table of Cont
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If you determine that it’s just o
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(see Figure 4.2). Figure 4.2 An Eth
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Division of Labor Previous Table of
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just that the network itself is at
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A Each situation is obviously diffe
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Ruling out is particularly effectiv
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Drive duplication can be a big help
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Previous Table of Contents Next Aft
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5. When you log problems on a given
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if they have a plan, they are going
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Is It a Virus, Doc? Previous Table
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O: Only have tried two other Intern
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A Remember that what a user says is
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Previous Table of Contents Next Loo
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Figure 7.1 Searching several sites
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You’ll also find forums run by th
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Previous Table of Contents Next
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a server but you think it should be
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Workshop Q&A Previous Table of Cont
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Previous Table of Contents Next Par
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Name Brand Versus Generic PCs The c
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static electricity that may have bu
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SIMMs and DIMMs There are two kinds
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This is called looping back, becaus
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Windows Previous Table of Contents
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Figure 8.4 The NT Task Manager’s
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UNIX Previous Table of Contents Nex
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Probably the most important thing t
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Hour 9 Ethernet Basics Previous Tab
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which translates into lots of colli
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it currently requires fiber-optic c
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designation is simply an industry-s
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Down, Down, Down Previous Table of
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A Collisions cause other errors, su
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Follow the Rules: Share and Enjoy!
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Previous Table of Contents Next Err
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Token Analyzers Finding a NAUN is r
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Token-Ring does not have any hard-a
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Down Town Previous Table of Content
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C. 1, 16 D. 4, 16 Answers to Quiz Q
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Going Native Although Windows allow
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Eminent Domain Previous Table of Co
Page 149 and 150: machine with the username Administr
Page 151 and 152: protocol. They therefore relied on
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Page 155 and 156: Most of the time, you’ll not want
Page 157 and 158: allows you to manage them and check
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Page 161 and 162: Figure 11.6 Showing bindings for al
Page 163 and 164: Informational Commands Previous Tab
Page 165 and 166: Figure 11.8 A monitor session. We k
Page 167 and 168: case you need them. 2. What does SM
Page 169 and 170: a great example of client/server. W
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Page 173 and 174: The first number is the process ID
Page 175 and 176: tcp 0 0 frotz.frob.com.telnet 200.1
Page 177 and 178: Name Game Previous Table of Content
Page 179 and 180: The next thing you need to find out
Page 181 and 182: A UNIX security and file permission
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Page 185 and 186: the amount of time used or data sen
Page 187 and 188: NLMs In addition to accepting comma
Page 189 and 190: NLM Party Previous Table of Content
Page 191 and 192: Again, make sure you are running th
Page 193 and 194: Big Monitor Is Watching Previous Ta
Page 195 and 196: Then, eureka! During one session of
Page 197 and 198: Protocol Problems Previous Table of
Page 199: Figure 13.10 UNICON will configure
Page 203 and 204: 7. The TCP/IP protocol and basic se
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Page 209 and 210: Router 1 in Figure 14.3 is shown in
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Page 217 and 218: Figure 14.4 How two stations talk v
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Page 221 and 222: garbage characters like these on a
Page 223 and 224: A. Add Router 99 to Router 88’s r
Page 225 and 226: Let’s lay out some definitions he
Page 227 and 228: Packet-Filtering Routers Previous T
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Page 231 and 232: from the proxy server without causi
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Page 235 and 236: 3. The proxy server resolves the na
Page 237 and 238: Q My vendor says that its firewall
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Page 241 and 242: • Make checklists of tasks that m
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Page 245 and 246: groups | grep -q -w network && { ec
Page 247 and 248: If you’re going to add or replace
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in this hour—will pay off as you
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Q Which duplication software is rig
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Hour 17 Where Do I Start? Previous
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As optimistic as we’d all like to
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• PCAnywhere • ReachOut • Rem
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IPX/SPX Previous Table of Contents
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Q What happens if I ping the loopba
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correlations? A. netstat -a B. trac
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equire that the application files t
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The File and Print Blues Previous T
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With five potential points of failu
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In some cases, a slight difference
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Application Celebration Previous Ta
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Proto Local Address Foreign Address
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printer 515 Line Printer Daemon (ne
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Connected to 167.195.160.6. Escape
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Workshop Q&A Q What in the blazes i
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3. A 4. B 5. False 6. B 7. True 8.
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Intranet = Internal The word intran
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Internet Identification Previous Ta
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If an outside machine is “on the
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Here I Ping Again Previous Table of
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Figure 19.6 DNS zones, like the fol
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[rs.internic.net] Registrant: John
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For example, I ran an NFS server on
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• SMTP—Simple Mail Transfer Pro
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Dialout DNS Previous Table of Conte
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3. What does DMZ stand for? A. DNS
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• It’s a way to avoid a Dilbert
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Socks Stuff Previous Table of Conte
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Figure 20.2 The AOL Instant Messeng
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RealPlayer Previous Table of Conten
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external client for proxy support,
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Typical Operation Previous Table of
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scantily, and still others are not
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Not every kind of filter is availab
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important. Your relative or interpa
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Application Antics Previous Table o
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Broken Ring Previous Table of Conte
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creating a segment between the swit
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Q Where can I get an Ethernet mini-
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Figure 22.1 The MG-Soft MIB browser
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the probe has picked up what’s go
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Previous Table of Contents Next Her
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information without the overhead th
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A. Broadcast B. Baseline C. Brag D.
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• Application efficiency • Serv
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Application and Protocol Efficiency
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and so on—is to measure. Everythi
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it a point to say, “Would you sho
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Here are the two types of performan
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Network Statistics Previous Table o
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Q About that latency analysis metho
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Router Configuration Previous Table
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For the second option, you’ll hav
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Automatic for the People Previous T
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are in an unknown location) to conn
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Previous Table of Contents Next The
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C. SYS:SYSTEM\AUTOEXEC.BAT D. SYS:P
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active hub An active hub is one tha
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A TCP-based authentication service
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applications and protocols are base
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An extremely fast network cable tha
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See Internet Group Management Proto
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A device that converts (modulates)
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providers. Point-to-Point Tunneling
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security audit An examination (ofte
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An essential part of a network inte
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Index Symbols A 100 Megabit Etherne
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C new product, 45-46 burned-in addr
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DLC (Data Link Control), 17 DMZ (de
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F fat finger factor, 42-43, 46 fata
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ICQ, 335-336 IMAP (Internet Mail Ap
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M filters, 347-352 LANDecoder, 347
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NetBIOS (Network Basic Input/Output
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network card. See NIC Network Contr
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power supply check, 66 troubleshoot
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Q-R qualitative problems, 58 quanti
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names, 393-394 NetWare, 202 paging
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T dumb terminal mode, 211, 224 full
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isolating soft errors, 135-136 LANa
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U standardizing configuration, 245
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V W upstream, 134 Usenet newsgroups
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autodetection problems, 159 broadca
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