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Topic: Traceroute

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	traceroute(8)
		Traceroute utilizes the IP protocol `time to live' field and attempts to elicit an ICMP TIME_EXCEEDED response from each gateway along the path to some host.
		Traceroute hopes that noth- ing is listening on UDP ports base to base + nhops * nprobes - 1 at the destination host (so an ICMP PORT_UNREACHABLE message will be returned to terminate the route tracing).
		In the TCP case, traceroute should listen for a RST from the destination host (or an intermediate router that's filtering packets), but this is not implemented yet.
	www.freebsd.org /cgi/man.cgi?query=traceroute&sektion=8 (1563 words)

	Traceroute Gateway - WebReference.com
		Traceroute should only be used as a last resort, after other network testing procedures have been exhausted (ping, etc.).
		It imposes a load on the network (although the packets it sends are low priority), and should be used during off hours, and to troubleshoot network problems.
		Traceroute will show you the number of hops between your network and the machine you are attempting to reach.
	www.webreference.com /cgi-bin/traceroute.cgi (406 words)

	Traceroute Servers for HENP & ESnet
		Traceroute, in its most basic form, allows you to print out a list of all the intermediate routers between two destinations on the Internet.
		Traceroute is a useful tool for a cracker to learn more about your site.
		Thus traceroute.pl rejects attempts to traceroute to a broadcast address, and does not allow a remote host name to be greater than 255 characters to prevent buffer overflow attempts.
	www.slac.stanford.edu /comp/net/wan-mon/traceroute-srv.html (1518 words)

	Paris traceroute (Site not responding. Last check: )
		In this regard, designing a new traceroute able to uncover all routes from a source to a given destination would be a significant improvement.
		Indeed, the current traceroute is not adequate to that task, as it cannot definitively identify one single route from among many.
		In the default usage of traceroute (i.e., three probes per hop), it is easier to identify instances of hops that respond with multiple interfaces.
	paris-traceroute.net /newtraceroute.htm (1331 words)

	Traceroute
		Traceroute is the program that shows you the route over the network between two systems, listing all the intermediate routers a connection must pass through to get to its destination.
		A problem reflected in a traceroute output may actually not lie with the obvious system in your trace; it may rather be with some other system on the reverse route back from the system that looks, from the trace, to be the cause of the problem.
		If your traceroute ends in timeouts at a certain system, it's likely that either the connection between that system and the next system on the route, or the next system itself, is the source of the problem.
	www.exit109.com /~jeremy/news/providers/traceroute.html (3695 words)

	Traceroute using Java Servlet and JNI. Traceroute Survey.
		Traceroute program lets us to see the route of IP datagram which follows from one Internet host to other.
		Some details about traceroute and other network tools are on the site of Berkley's Network Research Group staff that Van Jackobson worked for.
		The idea of Traceroute is to use TTL field (time-to-live) in the IP header.
	cities.lk.net /traceroute.htm (471 words)

	YoLinux.com Manpage: traceroute
		Traceroute utilizes the IP protocol 'time to live' field and attempts to elicit an ICMP TIME_EXCEEDED response from each gateway along the path to some host.
		Traceroute hopes that nothing is listening on UDP ports base to base + nhops - 1 at the destination host (so an ICMP PORT_UNREACHABLE message will be returned to terminate the route tracing).
		Because of the load it could impose on the network, it is unwise to use traceroute during normal operations or from automated scripts.
	node1.yo-linux.com /cgi-bin/man2html?cgi_command=traceroute (1294 words)

	Traceroute Command
		The traceroute command traces the network path of Internet routers that packets take as they are forwarded from your computer to a destination address.
		Remember when doing an online traceroute that the test is done from the web site, so the times reflect the Internet path from that location and not from your computer.
		However, an online traceroute is still useful to test the speed and length of network communications to an address from various locations around the Internet.
	www.livinginternet.com /i/ia_tools_tracroute.htm (440 words)

	Linux and UNIX traceroute command help
		traceroute skips processing for those intermediate gateways which are less than first_ttl hops away.
		If something is listening on a port in the default range, this option can be used to select an unused port range.nhops is defined as the number of hops between the source and the destination.
		Note: in this example because we are local to the address we are tracerouting the amount of hops is very minimal.
	www.computerhope.com /unix/utracero.htm (635 words)

	What is traceroute? - a definition from Whatis.com - see also: trace route
		Traceroute is a handy tool both for understanding where problems are in the Internet network and for getting a detailed sense of the Internet itself.
		Another utility, ping, is often used prior to using traceroute to see whether a host is present on the network.
		Traceroute determines when the packet has reached the destination by including a port number that is outside the normal range.
	searchsmb.techtarget.com /sDefinition/0,,sid44_gci213209,00.html (439 words)

	What is traceroute? - a definition from Whatis.com - see also: trace route
		Traceroute is a utility that records the route (the specific gateway computers at each hop) through the Internet between your computer and a specified destination computer.
		Traceroute is a handy tool both for understanding where problems are in the Internet network and for getting a detailed sense of the Internet itself.
		Traceroute determines when the packet has reached the destination by including a port number that is outside the normal range.
	whatis.techtarget.com /definition/0,,sid9_gci213209,00.html (384 words)

	An Atlas of Cyberspaces - Tracing Routes
		There are a number of geographical traceroute utilities that try to map the geographical locations of routers.
		This is VisualRoute, an another excellent traceroute utility that maps the router locations onto the real-world, as well as showing you the details of each hop in table.
		tracemap from Matrix.Net a is a Web-based geographical traceroute.
	www.cybergeography.org /atlas/routes.html (593 words)

	Online Traceroute
		Traceroute performs this test three times on each device (each device is called a "hop").
		The results from traceroute show you the path between two computers, the IP addresses and the names of the devices along the path, and the amount of time in milliseconds each device took to receive, process and send back the traceroute request (Internet Control Message Protocol or ICMP).
		Graphical versions of traceroute are available giving the same results as the original (and free) traceroute program but adding two features: (1) displaying the results graphically making it easier to read and (2) attempt to show the physical location of each device (also known as a 'hop') along the Internet route between the two computers.
	www.t1shopper.com /tools/traceroute (547 words)

	Traceroute Tutorial (Site not responding. Last check: )
		For this reason, the times which are actually returned in the traceroute readout are not actually reflective of the times that it requires packets from another protocol such as telnet, SMTP, or FTP to arrive at the destination and gateways along the route.
		This application is useful for determining whether a host is up and running on the network and/or whether there is a host or gateway along the path that is not passing along packets properly.
		traceroute to u.washington.edu (140.142.75.1), 30 hops max, 40 byte packets
	www.cni.org /pub/inetroom/traceroute.html (0 words)

	ICMP type 30, Traceroute reply
		This message is generated in response to an IP packet carrying the IP Traceroute option.
		The proposed traceroute would use a different algorithm to achieve the same goal, namely, to trace the path to a host.
		The Outbound Hop Count as copied from the IP Traceroute option of the packet which caused this Traceroute message to be sent.
	www.networksorcery.com /enp/protocol/icmp/msg30.htm (586 words)

	RFC 2925 (rfc2925) - Definitions of Managed Objects for Remote Ping, Trace
		Traceroute is usually implemented by transmitting a series of probe packets with increasing time-to-live values.
		Each hop in a traceroute path returns an ICMP message that is used to discover the hop and to calculate a round trip time.
		In both cases traceroute relies on the probes being rejected via an ICMP message to discover the hops taken along a path to the final destination.
	www.faqs.org /rfcs/rfc2925.html (8716 words)

	traceroute
		SYNTAX traceroute [options] host [packetsize] Options host Host name or IP number -m max_ttl Set the max time-to-live (max number of hops) used in outgoing probe packets.
		Traceroute hopes that nothing is listening on UDP ports base to base+nhops-1 at the destination host (so an ICMP PORT_UNREACHABLE message will be returned to terminate the route tracing).
		This is due to a buggy kernel on the 2nd hop system - lbl-csam.arpa - that forwards packets with a zero ttl (a bug in the distributed version of 4.3 BSD).
	www.ss64.com /osx/traceroute.html (1069 words)

	Traceroute: A TCP/IP Packet Route Tracing Tool
		Traceroute, originally written by Van Jacobson in 1988, is a TCP/IP utility which allows the user to determine the route packets take to reach a particular host.
		The traceroute utility uses these returning packets to produce a list of hosts that the packets have traversed en route to the destination.
		Traceroute does not provide any information regarding the physical location of each node along the route, which makes it difficult to effectively identify geographically circuitous unicast routing.
	www.networkdictionary.com /software/traceroute.php (444 words)

	Ping and Traceroute \| Technical Support \| MOREnet
		Traceroute and Ping are small programs and will run with small amounts of RAM and hard drive space.
		Traceroute (tracert) works by sending a packet to an open UDP port on a destination machine.
		Traceroute repeats this, gradually incrementing the TTL until a path to the remote host is traced and it gets back an ICMP Port Unreachable message, indicating that the remote host has been reached.
	www.more.net /technical/pingtrace.html (1364 words)

	Cable Modem Troubleshooting Tips: Traceroute
		Before using traceroute, ensure that your network connection is idle (no download or upload), and that there is no background activity which might put traffic on your network connection.
		If other hops in the traceroute are also private addresses (in the ranges 192.168.xxx.xxx, 172.xx.xxx.xxx or 10.xxx.xxx.xxx) you can repeat this process for all such addresses to speed up traceroute results, using invented names for them.
		Because a traceroute reveals only the outward path, leaving the return path unknown, investigation of networking problems between your PC and a specific host ideally require a traceroute from that host back to your own PC.
	homepage.ntlworld.com /robin.d.h.walker/cmtips/traceroute.html (2084 words)

	Traceroute Utility (Site not responding. Last check: )
		Traceroute can tell you the path your packets travel as they leave your system and head for their destination.
		Traceroute can tell you how many routers your packets travel through, how long it takes to travel between routers, and, if the routers have DNS entries, the names of the routers and their network affiliation and geographic location.
		Traceroute continues to do this, recording the IP address and name of each router until a packet finally reaches the target host, or until it decides that the host is unreachable.
	www.rjsmith.com /tracerte.html (464 words)

	TraceRoute
		Traceroute depends on the common router practice of sending an ICMP Time Exceeded message, documented in RFC 792, back to the sender when this occurs.
		In a typical traceroute session, a group of packets with TTL=1 are sent.
		Port is the UDP port number that traceroute uses on its first packet, and increments by one for each subsequent packet.
	www.freesoft.org /CIE/Topics/54.htm (980 words)

	bway netwatch \| tools \| traceroute (Site not responding. Last check: )
		Traceroute is usually the first tool to use when you can't go somewhere on the internet.
		Traceroute sends three ping packets to each machine along the way, and returns the time in milliseconds that it takes to get there.
		Fortunately, there are two ways around this: either get a version of traceroute that has been ported to whatever system you do have, or use one of the web-based traceroute servers that are being operated by considerate companies around the world.
	www.bway.net /bway/channel/netwatch/traceroute.html (640 words)

	Debian -- traceroute (Site not responding. Last check: )
		The traceroute utility displays the route used by IP packets on their way to a specified network (or Internet) host.
		Traceroute displays the IP number and host name (if possible) of the machines along the route taken by the packets.
		Traceroute is used as a network debugging tool.
	packages.debian.org /unstable/net/traceroute.html (170 words)

	traceroute(8): print route packets trace to ... - Linux man page
		traceroute tracks the route packets take across an IP network on their way to a given host.
		Tells traceroute to add an IP source routing option to the outgoing packet that tells the network to route the packet through the specified gateway.
		There is no such problem for ICMP or TCP tracerouting (for TCP we close sessions immediately after connect).
	www.die.net /doc/linux/man/man8/traceroute.8.html (1020 words)

	Rick's spam digest :: Spamstopper's notebook -- traceroute
		traceroute is a basic network tool that can print out the path (actually, to be completely accurate, "one possible path") that IP packets could take from an originating host (i.e., the machine you're using or that you're logged into) to some destination host.
		Nevertheless, traceroute is invaluable for helping you find the network locations and upstream providers for a spam operation.
		I actually ran four commands here for purposes of illustration: a ping (to determine whether the host was online), the traceroute command, and two date commands to print the local date and time so as to "time-stamp" the start and end of the traceroute query.
	www.rickconner.net /spamweb/tools-traceroute.html (1484 words)

	Cisco - Using the traceroute Command on Operating Systems
		The traceroute command allows you to determine the path a packet takes in order to get to a destination from a given source by returning the sequence of hops the packet has traversed.
		If you execute the traceroute ip-address command on a source device (such as a host, or a router acting as a host), it sends IP packets toward the destination with Time To Live (TTL) values that increment up to the maximum specified hop count.
		The extended traceroute command is a variation of the ordinary traceroute command which allows the default values of the parameters used by the traceroute operation such as TTL and destination port number to be modified.
	www.cisco.com /warp/public/105/traceroute.shtml (2311 words)

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