providing secure network administration
Network administration
... /etc/netmasks - Chứa netmask tơng ứng với địa network IP #Network subnet masks #Unless your network is subnetted, not bother to maintain this file #Network subnet mask 134.54.0.0 255.255.255.0 ... hostname aliases 127.0.0.1 localhost 201.190.2.1 jade /etc/networks - Chứa network name ánh xạ tới địa mạng IP tơng ứng Ví dụ: # Name Network Number testnetw 201.190.2 loopback-net 127 /etc/services ... kiểu network interface card (Ví dụ 3Com 3C5x9 nh elx0) IP_address - Địa IP gán cho network interface Có thể sử dụng host name cung cấp /etc/hosts với địa IP tơng ứng netmask mask - Là subnetwork...
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OCP: Oracle8i DBA Performance Tuning and Network Administration Study Guide
... Network Administration Study Guide 1Z0025 Oracle8i: Backup and Recovery 60 34 57% OCP: Oracle8i™ DBA Architecture & Administration and Backup & Recovery Study Guide 1Z0026 Oracle8i: Network Administration ... Two: OCP Oracle8i Network Administration Chapter 11 introduces the basic network architecture You will learn about the areas to consider when designing and implementing an Oracle network You will ... Architecture & Administration and Backup & Recovery Study Guide Copyright ©2000 SYBEX , Inc., Alameda, CA www.sybex.com Introduction xxix OCP: Oracle8i™ DBA Performance Tuning and Network Administration...
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Network Administration and Troubleshooting
... Last Resort i Router(config)#ip default -network w.x.y.z Sets network w.x.y.z to be the default route All routes not in the routing table will be sent to this network i Router(config)#ip route 0.0.0.0 ... route 0.0.0.0 0.0.0.0 command instead Routers that use the ip default -network command must have either a specific route to that network or a 0.0.0.0 /0 default route Determining the Last Routing ... instances Disable CDP globally if • CDP is not required at all • The device is located in an insecure environment Use the command no cdp run to disable CDP globally: n RouterOrSwitch(config)#no...
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Managing a Secure Network
... Area Network SAN Question Which two primary port authentication protocols are used with VSANs? (Choose two.) CHAP DHCHAP Securing Local Area Networks Question You suspect an attacker in your network ... For the following options, which feature is the foundation of Cisco Self-Defending Network technology? secure network platform Question Which type of intrusion prevention technology will be primarily ... any internal hosts or networks inbound to our private network The SDM_DEFAULT_198 denies all packets containing the following IP addresses in their source field: + Current network 0.0.0.0/8 (only...
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TCP/IP Network Administration- P1
... TCP/IP Network Administration The Networking CD Bookshelf Navigation Copyright © 1999 O'Reilly & Associates All Rights ... translating : 5.2 Linux Kernel Configuration admin alias : 10.3 sendmail Aliases administration : (see network, administration) admintool 9.2.2 Solaris Line Printer Service 12.2.1 The Shadow Password ... Internet Mail Extensions enterprise networks : 4.1 Connected and Non-Connected Networks subnets : 5.2 Linux Kernel Configuration enterpriseSpecific trap : 11.9 Simple Network Management Protocol equal-cost...
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TCP/IP Network Administration- P2
... 6.3.4 PPP Daemon Security secure copy (scp) : 12.2.6 Secure Shell SECURE points : 12.4.3.1 COPS secure shell (ssh) : 12.2.6 Secure Shell daemon (sshd) : 12.2.6 Secure Shell SECURE_ USERS variable ... addresses) ssh (secure shell) : 12.2.6 Secure Shell command : 12.2.6 Secure Shell daemon (sshd) : 12.2.6 Secure Shell ssh/identity.pub : 12.2.6 Secure Shell ssh/known_hosts file : 12.2.6 Secure Shell ... Gateway Protocol Network Control protocols : 6.2.1 The Serial Protocols Network File System : (see NFS) Network Information Center : (see NIC) Network Information Service : (see NIS) Network Layer...
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TCP/IP Network Administration- P3
... of very large networks Some of the protocols have only been used by large national and regional networks For local area networks, RIP is still the most common choice For larger networks, OSPF ... lead to networks One reason network routes are used is to reduce the size of the routing table An organization may have only one network but hundreds of hosts The Internet has thousands of networks ... for your network Minimal routing A network completely isolated from all other TCP/IP networks requires only minimal routing A minimal routing table usually is built by ifconfig when the network...
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Tài liệu TCP/IP Network Administration- P4 docx
... configuration is not really a network administration task - rather, it is a basic part of UNIX system administration, whether or not the computer is connected to a network But TCP/IP networking, like other ... Net/Dest The Network/ Destination field shows the network or the destination host to which the interface provides access In our Ethernet examples, this field contains a network address The network ... are directly related to network configuration The first network configuration question is: Networking support (CONFIG_NET) [Y/n/?] Answer "yes" (y), which is the default Networking support is necessary...
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Tài liệu TCP/IP Network Administration- P5 docx
... Configuring Network Servers Many TCP/IP networks are not connected to the Internet On these networks, TCP/IP is used for communication between the organization's various networks Private networks ... connected to the same network Gateways are needed to communicate with systems on other networks If the hosts on your network need to communicate with computers on other networks, a route through ... happens on the external networks Some routing decisions are thrust upon you by the external networks to which you connect In Figure 4.1 the local network connects to an external network that requires...
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Tài liệu TCP/IP Network Administration- P6 ppt
... to map network addresses to network names because many network names are not included in the DNS database To create the /etc/networks file, download the file ftp://rs.internic.net/netinfo/networks.txt ... specific physical network, but when data travels across a network, it must obey the physical layer protocols used by that network The physical networks that underlay the TCP/IP network not understand ... physical networks together, but only if each physical network has its own unique network address Subnetting divides a single network address into many unique subnet addresses, so that each physical network...
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Tài liệu TCP/IP Network Administration- P7 pdf
... system administrators Networking these computers gives us new tasks as network administrators Network administration and system administration are two different jobs System administration tasks ... independent computer system Not so with network administration Once you place your computer on a network, it interacts with many other systems The way you network administration tasks has effects, ... directly attached network It defines how to use the network to transmit an IP datagram Unlike higher-level protocols, Network Access Layer protocols must know the details of the underlying network (its...
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Tài liệu TCP/IP Network Administration- P8 docx
... printers The network administrator's task is to ensure that the printers are accessible via the network and that they are properly secured Previous: 9.1 The Network File System TCP/IP Network Administration ... configuring network servers As with name service, these servers are not strictly required for the network to operate, but they provide services that are central to the network' s purpose There are many network ... server that provides file sharing on UNIX networks 9.1 The Network File System The Network File System (NFS) allows directories and files to be shared across a network It was originally developed by...
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Tài liệu TCP/IP Network Administration- P9 docx
... sendmail in a TCP/IP network environment You shouldn't need to modify any mailer definitions Previous: 10.4 The sendmail.cf File 10.4 The sendmail.cf File TCP/IP Network Administration Book Index ... support SMTP sends email over TCP/IP networks Another program sends mail between users on the same system Still another sends mail between systems on UUCP networks Each of these mail systems - ... of 3) [2001-10-15 09:18:35] [Chapter 10] sendmail Previous: 9.8 Summary 9.8 Summary TCP/IP Network Administration Book Index Next: 10.2 Running sendmail as a Daemon 10.2 Running sendmail as a...
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Tài liệu TCP/IP Network Administration- P10 pdf
... goal of the network administrator is to avoid problems That is also the goal of network management software The network management software used on TCP/IP networks is based on the Simple Network ... Connectivity unreliable networks, and some wide area networks suffer a lot of packet loss But if these problems are seen on a local area network, they indicate trouble On a local network cable segment, ... 11.2 Diagnostic Tools 11.2 Diagnostic Tools TCP/IP Network Administration Book Index Next: 11.4 Troubleshooting Network Access 11.4 Troubleshooting Network Access [ Library Home | DNS & BIND | TCP/IP...
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Tài liệu TCP/IP Network Administration- P11 docx
... keeping your network secure Previous: 11.9 Simple Network Management Protocol 11.9 Simple Network Management Protocol TCP/IP Network Administration Book Index Next: 12 Network Security 12 Network ... point through which all traffic between a secured network and an unsecured network must pass In practice, it is usually a choke point between an enterprise network and the Internet Creating a single ... blocking the streets Likewise, network security generally means providing adequate security on individual host computers, not providing security directly on the network In very small towns, where...
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Tài liệu TCP/IP Network Administration- P12 ppt
... sent over the network and stored at 100 receiving systems Network news provides a more efficient method for distributing this kind of information The information is stored around the network on, ... the number of redundant copies that are stored on local disk files Network news is delivered over TCP/IP networks using the Network News Transfer Protocol (NNTP) NNTP is included as part of the ... for a specific network To find out, enter a whois query with the network number In our example, the IP address of one of the servers is 207.25.97.8 This is a class C address, so the network number...
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Tài liệu TCP/IP Network Administration- P13 docx
... mask of the network is used Two options can be used: exact Matches a network, but no subnets or hosts of that network refines Matches subnets and/or hosts of a network, but not the network itself ... specified, the summary network LSAs are not advertised The entries in the networks list are either specified as host addresses by using the host keyword before the address, or as a network address by ... the system has only one network interface By default, RIP updates are not broadcast if the system has only one network interface and are broadcast if it has more than one network interface; i.e.,...
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Tài liệu TCP/IP Network Administration- P14 docx
... limits their flexibility sortlist network network The sortlist command causes named to prefer addresses from the listed networks over addresses from other networks Normally, DNS sorts the addresses ... all subnets in the shared network The subnets in a shared network must be defined within the curly braces of the shared -network statement It is assumed that each shared -network statement contains ... and national networks to reduce the number of routes advertised With careful planning, large network providers can announce a few aggregate routes instead of hundreds of client network routes...
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Tài liệu TCP/IP Network Administration- P15 ppt
... with the sendmail distribution Previous: E.1 Compiling sendmail E.1 Compiling sendmail TCP/IP Network Administration Book Index Next: E.3 m4 sendmail Macros E.3 m4 sendmail Macros [ Library Home ... sendmail.cf is found in Chapter 10 Previous: E.2 The sendmail Command E.2 The sendmail Command TCP/IP Network Administration Next: E.4 More sendmail.cf Book Index E.4 More sendmail.cf [ Library Home | DNS ... [Appendix E] E.4 More sendmail.cf Previous: E.3 m4 sendmail Macros E.3 m4 sendmail Macros TCP/IP Network Administration Book Index Next: E.5 Sample Configurations E.5 Sample Configurations [ Library...
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