monitoring and troubleshooting tcp ip connections

... SanJose1# Step 10 The show tcp commands Type the show tcp ? command to see TCP activity Particularly the show tcp statistics command gives a good summary of TCP traffic sent and received SanJose1#show ... timeout, connections dropped in rxmt timeout Keepalive timeout, keepalive probe, Connections dropped in keepalive SanJose1#show tcp brief Step 11 The debug ip rip command Type the debug ip rip command ... the debug ip rip database command to see the actual entries as they are added to the RIP database SanJose1#debug ip rip ? database RIP database events events RIP protocol events trigger RIP trigger...

Ngày tải lên: 18/01/2014, 05:20

... telecommunications, and security, Ted teaches in the Networking and Security product lines and focuses on TCP/ IP, networking fundamentals and CISSP preparation He currently holds CISSP certification and has ... are many other techniques and tools for troubleshooting the physical and data link layers The ones suggested above are the most common and easiest for most people to use Troubleshooting OSI Layer ... header and the beginning of the associated RIP information captured from the network using a protocol analyzer Knowledge of UDP and RIP are required to successfully use this information for troubleshooting...

Ngày tải lên: 17/01/2014, 06:20

... Server Monitoring and Reporting feature You can then use this data to validate the accuracy of your original personas and bandwidth estimations, and to predict future requirements 2.3 Bandwidth ... simulate and evaluate the anticipated load and the impact that Lync Server services may have in a given site or between sites Even if you’ve already documented and planned anticipated usage models and ... speed and type  Bandwidth monitoring per WAN link  Number of traffic queues, and queue sizes  Number of users per network site Historical data provides valuable information for usage levels and...

Ngày tải lên: 12/07/2014, 11:38

... Associations and IPSec Key Management Procedures _ 46 IPSec Key Management 46 Phase 1: Establishing the ISAKMP SA _ 46 Phase 2: Establishing the IPSec SA ... combination of IP address and subnet mask can segregate the physical network into logically separate networks Multiple routes can be configured between networks, providing TCP/ IP with a measure of ... 47 TOPIC 11: Deploying IPSec _ 48 Building Security Policies with Customized IPSec Consoles 48 Building an IPSec MMC Console _...

Ngày tải lên: 13/08/2014, 15:21

... Securing Windows 2000 TCP/ IP TOPIC 5: Using TCP/ IP Utilities The Windows 2000 distribution ships with a number of command-line utilities to assist in troubleshooting TCP/ IP network problems If ... statistics and current TCP/ IP connections Several command-line switches are available to display information such as all connections and listening ports, Ethernet statistics, addresses and port ... display IP configuration, manage the DHCP client, and manage and display the DNS cache New switches for the ipconfig command include /flushdns, /registerdns, and /displaydns Running ipconfig...

Ngày tải lên: 13/08/2014, 15:21

... of the network (and TCP/ IP) by drilling down deeper into its technical core This can take the form of network analysis where TCP/ IP traffic is captured and analyzed, or system monitoring where ... from the Run command Type evntwin.exe at the Run command and click OK Copyright 2003 by Syngress Publishing, All rights reserved 22 How to Cheat at Securing Windows 2000 TCP/ IP This launches ... frame Notice the detail in the middle pane It indicates the hardware type and speed, and the source and destination IP and hardware address The destination hardware address is the Ethernet broadcast...

Ngày tải lên: 13/08/2014, 15:21

... smart card support, use EAP authentication On the IP tab, verify that the “Enable IP routing” and “Allow IP- based remote access and demand-dial connections check boxes are both checked Next, configure ... point-to-point connections, and the device provides a port, or communication channel, that supports a point-to-point connection A standard modem is a single-port device PPTP and L2TP are virtual multiport ... pairs: a public key and a private key The public key is available to anyone and everyone, and is not considered confidential The private key, on the other hand, is secret, and is available only...

Ngày tải lên: 13/08/2014, 15:21

... header and the TCP header Only the TCP header, data, and ESP trailer are encrypted If authentication of the original IP header is required, you can combine and use AH and ESP together AH and ESP ... computers not employ IPSec, and can use any LAN protocol supported by IPSec (IPX/SPX, AppleTalk, NetBEUI, TCP/ IP) When gateways represent the endpoints of secure communication, IPSec works in tunnel ... 2000 TCP/ IP TOPIC 10: Security Associations and IPSec Key Management Procedures When two computers establish a connection using IPSec, they must come to an agreement regarding which algorithms and...

Ngày tải lên: 13/08/2014, 15:21

... Size TCP Checksum Urgent Pointer Options Data TCP Implementation Multiplexing Data Sequencing and Acknowledgment Flow Control TCP Connection Management TCP Open Initial Sequence Number (ISN) TCP ... The Push Flag TCP Sliding Windows Slow Start and Congestion Avoidance Nagle Algorithm Data Protection Case Study: TCP Checksum Errors TCP Expert Symptoms TCP Application Analysis TCP and Throughput ... read many good books on the TCP/ IP protocol, including W Richard Stevens’ TCP/ IP Illustrated (Addison-Wesley January 1994) and Douglas Comer’s Internetworking with TCP/ IP (Prentice Hall January...

Ngày tải lên: 14/08/2014, 12:20

... sent TCP packet to the same destination IP address and TCP port numbers TCP Reset Inactive Connection The sender has set the Reset (RST) flag in a TCP packet TCP Reset Connection One end of a TCP ... the source IP host TCP Zero Window The recipients TCP receive buffer is filling up (low window) or full (zero window) TCP Too Many Retransmissions The source IP node is sending another TCP packet ... recovery time and throughput TCP Slow Acknowledgement The recipient appears to be slow in acknowledging TCP data segments TCP Retransmission The source IP node is sending another TCP packet with...

Ngày tải lên: 14/08/2014, 12:20

... of the AND operation are that a AND = and a AND = The subnet mask is a pattern of ones and zeros you use to compare to the IP address, performing the AND operation on each bit of the IP address ... 00-7A-3D-15-B2-23 IP: 172.16.1.1 IP: 172.16.1.2 IP: 172.16.1.3 Client A Client B Client C IP: 172.16.1.1 MAC : 00-5C-7A-84-13-75 Server Figure 3-6 IP and NetBEUI network A node using the IP protocol ... even on, and its IP stack was nonfunctioning Reserved Addressing IP addresses are really just a series of 32 binary digits that make up the entire 4-byte IP address Hosts and routers on an IP network...

Ngày tải lên: 14/08/2014, 12:20

... length, and protection of the IP header Packet flow fields, such as Type of Service, Fragmentation, and Time to Live, handle the end-to-end delivery of packets and problems with their transfer Multiplexing ... encrypt the data it sends across the network IPv6 uses the same security methods defined in the IPsec standards for IPv4 ■ ■ Network Service IPv6 retains IPv4’s ability to prioritize a packet’s transmission ... expressing IP addresses is used when you need to express an IPv4 address in IPv6 format, which is done by simply using the standard IPv4 decimal notation The address 172.16.34.1 can be expressed in IPv6...

Ngày tải lên: 14/08/2014, 12:20

... 10.239.1.82 10.239.1.82 10.239.1.80 RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP RIP Response, 25 Entries (ver 1) Response, ... 69/udp 70 /tcp 79 /tcp 80 /tcp 88 /tcp 88/udp 101 /tcp 102 /tcp 107 /tcp 109 /tcp 110 /tcp 111 /tcp 111/udp 113 /tcp 117 /tcp 119 /tcp 123/udp 135 /tcp 135/udp 137 /tcp 137/udp 138/udp 139 /tcp 143 /tcp 158 /tcp 161/udp ... print-srv bgp irc ipx ldap 7 /tcp 7/udp 9 /tcp 9/udp 11 /tcp 11 /tcp 13 /tcp 13/udp 17 /tcp 17/udp 19 /tcp 19/udp 20 /tcp 21 /tcp 23 /tcp 25 /tcp 37 /tcp 37/udp 39/udp 42 /tcp 42/udp 43 /tcp 53 /tcp 53/udp 67/udp...

Ngày tải lên: 14/08/2014, 12:20

... tracemasters.com Server Source Server mail4.bellatlantic.net HTTP TCP HTTP TCP TCP TCP TCP Protocol DNS DNS Info Standard query A www.tracemasters.com Standard query response CNAME tracemasters.com A 216.119.99.47 ... take note of: ■ ■ TCP Zero Window ■ ■ TCP Stuck Window 217 218 Chapter ■ ■ TCP Low Window ■ ■ TCP Idle Too Long ■ ■ TCP Long ACK The second group of symptoms deals with how TCP is transferring ... wait and acknowledge all of the data with a single TCP acknowledgment rather than waste network bandwidth on individual ACKs Figure 6-28 Ethernet IP TCP HTTP Browser JAY Request (Frame 4) TCP...

Ngày tải lên: 14/08/2014, 12:20

... first and second digits FTP reply code categories from RFC 959 are listed in Table 7-5 265 266 Chapter Table 7-4 FTP Command Code Descriptions COMMAND DESCRIPTION ABOR Abort previous FTP command ... Frames to 9, you see the normal FTP command and reply activity, with the last command set being the PORT command to tell the FTP server the IP address and port pair on which to initiate the connection ... understand The other resource records are mostly outdated and no longer used In the case of the Ipv6 Address record type, it will become more important as ISPs and other organizations move to IP...

Ngày tải lên: 14/08/2014, 12:20

... chapter SMB Commands SMB commands are organized into top-level commands and subcommands A top-level command will specify the subcommand below it, and the subcommand will specify any subcommands below ... (ACK) Dest IP Addr 255.255.255.255 Source IP Addr Frame (Request) Dest IP Addr 255.255.255.255 Source IP Addr Frame (Offer) Dest IP Addr 255.255.255.255 Source IP Addr Source IP Addr Source IP Addr ... of UDP and TCP to provide clients and servers with various session-layer services such as name resolution, name registration, and resource location N OT E NetBIOS over TCP/ IP concepts and methods...

Ngày tải lên: 14/08/2014, 12:20

... Process ID: 65279 User ID: 2048 Multiplex ID: 16 Session Setup AndX Response (0x73) Word Count (WCT): AndXCommand: No further commands (0xff) Reserved: 00 AndXOffset: 235 Action: 0x0000 .0 ... Connect AndX Request (0x75) Word Count (WCT): AndXCommand: No further commands Reserved: 00 AndXOffset: 76 Flags: 0x0008 Password Length: Byte Count (BCC): 33 Password: 00 Path: \\Michelle\IPC$ ... 2048 Process ID: 65279 User ID: 2048 Multiplex ID: 48 Tree Connect AndX Response (0x75) Word Count (WCT): AndXCommand: No further commands Reserved: 00 AndXOffset: 56 Optional Support: 0x0001...

Ngày tải lên: 14/08/2014, 12:20

... failure, 276–278 commands and reply codes, 265–269 failure through firewall, 273–276 passive transfer failure, 272–273 PASV command, 271 PORT command, 269 TCP connections and, 268 G gateway, 82, ... NetBIOS over TCP/ IP NBTSTAT and, 314–315 NetBIOS names, 312–314 operations, 320–329 overview of, 312 services, 315–320 NetBIOS over TCP/ IP name server option (DHCP), 309 NetBIOS over TCP/ IP node type ... system requirements, 369–370 T TCP Checksum field, 182, 215–217 TCP Close, 192–193 TCP Half-Close, 193 TCP Open, 185–192 TCP Reset, 194–200 TCP retransmissions, 274 TCP (Transmission Control Protocol)...

Ngày tải lên: 14/08/2014, 12:20

Ngày tải lên: 21/12/2013, 19:15

Ngày tải lên: 21/12/2013, 19:15