understanding your linux network

... and the O'Reilly logo are registered trademarks of O'Reilly Media, Inc The Linux series designations, Understanding Linux Network Internals, images of the American West, and related trade dress ... helped develop their networking courses, based entirely on Linux boxes That gave me access to a good lab equipped with all sorts of network devices and documentation, plus plenty of Linux enthusiasts ... multiprocessing (SMP) and kernel preemption This makes the networking code of the Linux kernel a very good gym in which to train and keep your networking knowledge in shape Moreover, if you are like...

Ngày tải lên: 13/08/2014, 04:21

... device driver design, PCI bus features, and implementation details, refer to Linux Device Drivers and Understanding the Linux Kernel, as well as PCI specifications The PCI subsystem (also known ... one is defined in include /linux/ mod_devicetable.h, and the other two are defined in include /linux/ pci.h pci_device_id Device identifier This is not a local ID used by Linux, but an ID defined ... with the Hotplug package try to recognize the Linux distribution and adapt the actions to their configuration file's syntax and location Let's take networking, the subject of this book, as an example...

Ngày tải lên: 13/08/2014, 04:21

... UDP Netconsole and its suboptions can be turned on from the make xconfig menu with the "Networking support Network console logging support" option To use Netpoll, devices must include support for ... option and all its suboptions from the make xconfig menu, you need first to select the "Networking support Networking options QoS and/or fair queueing Packet classifier API" option moc.fdpopmis.www//:ptth ... ingress frames was introduced into the Linux kernel, known (for lack of a better name) as NAPI Since few devices have been upgraded to NAPI, there are two ways a Linux driver can notify the kernel...

Ngày tải lên: 13/08/2014, 04:21

... VLANs on bridged networks It's a convenient way to create different L2 broadcast domains on bridged networks The possibility of defining multiple spanning tree topologies on the same network has several ... on eth0 Because Linux implements both routing and bridging, we can merge the two devices into a single Linux system and obtain something like the topology in Figure 16-2(a) The network connection ... implemented in Linux (yet) In the following two subsections, we will just explore some of the main improvements offered by the new protocols For more detail, I suggest the following documents: Understanding...

Ngày tải lên: 13/08/2014, 04:21

... the hosts on its network To be more precise, let's suppose R did masquerading:[*] the source IP addresses in the headers of the IP packets generated by the hosts in the internal network and addressed ... What Linux calls masquerading is also commonly called Port Address Translation (PAT) [ ] Note that since the return traffic from the Internet and addressed to the hosts in the internal network ... into certain places in the network stack code that packets always pass through when the packets or the kernel meet certain conditions; at those points, the firewall allows network administrators...

Ngày tải lên: 13/08/2014, 04:21

... Unix-legacy tool for configuring IP on network devices RTNetlink via ip ip, which is part of the IPROUTE2 package, is the newer tool that Linux offers for configuring IP on network devices /proc filesystem ... speed with which the Internet and network services have evolved since then, the protocol is showing its age Because IPv4 was not originally designed with today's big network topologies and commercial ... consideration such aspects as: Functionality Ease of configuration Performance Transition from IPv4 networks to IPv6 networks Security Naturally, the committees designing the new protocol have tried to keep...

Ngày tải lên: 13/08/2014, 04:21

... able to send back a reply; this in turn means that either it already had your L2 address or it learned your address from your request (see the section "Creating a neighbour Entry in Chapter 27 ... refers to the process of eliminating resources that are not in use anymore Like many Linux kernel subsystems (networking and others), the neighboring subsystem maintains a timer that runs periodically ... timeout required by the new element, whichever comes first Linux uses the same routine to process both new solicitation requests received from network devices and solicitation requests dequeued from...

Ngày tải lên: 13/08/2014, 04:21

... central role in the Linux networking code Here is what is covered in each chapter: Chapter 30 Routing: Concepts Introduces the functionality that a basic router, and therefore the Linux kernel, must ... form, a router can be defined as a network device that is equipped with more than one network interface card (NIC), and [*] that uses its knowledge of the network to forward ingress traffic appropriately ... 255.255.255.255 11111 Table 30-2 Network and host components Class Size of network address component Size of host address component Number of hosts (including network and broadcast addresses)...

Ngày tải lên: 13/08/2014, 04:21

... generated when a network device goes down (NEtdEV_DOWN) and when a device is unregistered (NEtdEV_UNREGISTER) You can find the complete list of NETDEV_XXX events in include /linux/ notifier.h When ... in the network stack and how big routing tables can be, it is important to have efficiently designed routing tables to speed up operations, particularly lookups This chapter describes how Linux ... fn_zone (The term zone refers to the networks that share a single netmask.) Thefn_zone structures organize routes into hash tables, so routes that lead to destination networks with the same netmask...

Ngày tải lên: 13/08/2014, 04:21

... subjects Philip Dangler was the production editor, and Audrey Doyle was the copyeditor for Understanding Linux Network Internals Sada Preisch proofread the book Mary Brady and Colleen Gorman provided ... list of network device initialization, list of networking, list of notification chains, list of PCI layer, list of protocol handlers, list of transmission and reception, list of disabling network ... short family Address family See AF_XXX values in include /linux/ socket.h unsigned short protocol Protocol ID See ETH_P_XXX values in include /linux/ if_ether.h unsigned gc_thresh This field, used by...

Ngày tải lên: 13/08/2014, 04:21

... nuts-net, ví dụ host O'Reilly chẳng hạn, kết khác hẳn % ping 207.25.98.2 sendto: Network is unreachable Khi thông báo "sendto: Network is unreachable" peanut để gửi data sang mạng có host 207.25.98.2 ... để giảm kích thước bảng routing Một tổ chức có mạng hàng trăm hosts Internet có hàng ngàn mạng networks có hàng triệu hosts Bảng routing với a route cho host trở nên quản lý Để kiểm tra bảng ... chạm đến dùng bảng routing Để minh hoạ, ping host khác subnet Ví dụ : % ping 172.16.1.2 sendto: network is unreachable Các ping tests cho thấy bảng routing tạo ifconfig cho phép giao tiếp với...

Ngày tải lên: 05/11/2012, 14:37

... GIANCOLA DOSTERT Understanding Ultra Wide Band Radio Fundamentals Powerline Communications Space–Time Wireless Channels Technologies, Standards, and QoS DURGIN GARG Wireless Network Evolution: ... Applications Ad Hoc Wireless Networks: Architectures and Protocols Ultra-Wideband Communications: Fundamentals and Applications PAHLAVAN & KRISHNAMURTHY PATTAN Principles of Wireless Networks: A Unified ... Communication Systems: Advanced Techniques for Signal Reception Fundamentals of WiMAX Understanding Broadband Wireless Networking Jeffrey G Andrews, Ph.D Department of Electrical and Computer Engineering...

Ngày tải lên: 27/04/2013, 08:58

... related to Linux networking are: linux- net Discussion relating to Linux networking linux- ppp Discussion relating to the Linux PPP implementation 16 linux- kernel Discussion relating to Linux kernel ... administration under Linux comp.os .linux. networking Discussions relating to networking with Linux comp.os .linux. development Discussions about developing the Linux kernel and system itself comp.os .linux. misc ... reference text for Linux 15 Linux Journal and Linux Magazine Linux Journal and Linux Magazine are monthly magazines for the Linux community, written and published by a number of Linux activists...

Ngày tải lên: 06/11/2013, 00:15

... Performance • Cost Fibre cable management also directly affects • Network maintenance and operations • Ability to reconfigure and expand your network • Ability to restore service • Ability to implement ... Advantages of Fibre A successful fibre network requires a strong fibre cable management system The management of the fibre cables has a direct impact on • Network reliability • Performance • Cost ... to intensify, the hallmarks of successful global networks are: • • • • Flexibility Reliability High bandwidth Low cost Today’s successful global networks utilize large amounts of fibre, the medium...

Ngày tải lên: 10/12/2013, 17:15

... of your network — how machines are connected — and whether you want a peer-to-peer or client/server network These details matter, because on one hand you can overbuild your network so that your ... performance from your equipment, monitor your system carefully and use Linux s built-in configurability wisely c3632-X Ch01.F 10 2/21/02 8:33 AM Page 10 Part I: Red Hat Linux System and Network Administration ... many tools that Red Hat Linux provides to help you guard against intrusion, even to help you prevent intrusion into non -Linux machines that may reside on your network Linux is designed from the...

Ngày tải lên: 12/12/2013, 22:15

... instructions for connecting your Red Hat Linux network to the Windows network The final chapter in this part, Chapter 10, tells you how to connect your Red Hat Linux network to computers running ... 120 Part II Red Hat Linux Network Services Chapter TCP/IP Networking 123 Chapter TCP/IP Explained 123 Understanding Network Classes ... about the networking services available in Red Hat Linux Chapter gives an explanation of the TCP/IP protocol suite and how to configure it on your system Chapter tells how to configure the Network...

Ngày tải lên: 12/12/2013, 22:15

... Wireless, circa 2005 Understanding the Promise of Wireless Wireless Networking Wireless Networking Applications for Business Wireless Networking Applications for Consumers Understanding the Benefits ... supports flash upgrades s Isolate the AP and regulate access from its network into your internal network s Conduct audits of your network using NetStumbler or other wireless scanning tools to make ... city.You have your trusty universal integrated two-way voice, data, and video multimedia PDA by your side Using references to your personal digital identification module stored in your PDA, your travel...

Ngày tải lên: 21/12/2013, 06:16

... Ext3 Filesystem Chapter 18 Networking Section 18.1 Main Networking Data Structures Section 18.2 System Calls Related to Networking Section 18.3 Sending Packets to the Network Card Section 18.4 ... build a network server using an old Intel 80386 system with MB of RAM Linux is powerful Linux systems are very fast, since they fully exploit the features of the hardware components The main Linux ... and in the fall of 2001 we started planning a second edition covering Linux 2.4 However, Linux 2.4 is quite different from Linux 2.2 Just to mention a few examples, the virtual memory system is...

Ngày tải lên: 21/12/2013, 11:15

... delegate "subname.yourname.com", create NS-records for "subname.yourname.com" in the "yourname.com" zone These NS-records must point to the DNS server responsible for "subname.yourname.com" for ... one of your client’s networks has been compromised with a backdoor program listening on port 31337 Your client requests a list of originating IP addresses connecting to that port Using a Linux ... size of a Linux swap partition is 128MB, although Linux supports up to 16 swap partitions Reference: Michael J Tobler New Riders, Inside Linux: Page 17 QUESTION NO: 49 In order to improve your system’s...

Ngày tải lên: 24/01/2014, 19:20