traceroute is a CLI networking tool which determines the layer 3 path which packets take to a specified destination. It does this by sending packets with incrementing TTLs starting from 1, which trigger ICMP time exceeded responses from the routers along the path.
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49 views
SSH won't work after associating Elastic IP on Amazon Ubuntu 12.04 32 bit micro instance
This morning my EC2 and elastic IP were working fine. All of a sudden, all hell broke loose and my EC2 won't access through my elastic IP anymore. When I did a ssh -vvv I get
debug1: Connecting ...
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2answers
70 views
Traceroute, ICMP, UDP and TCP
When does traceroute use TCP? Or does it just use UDP, also why does Traceroute use UDP on MacX and ICMP on windows? I thought ICMP just contains a message saying what caused the error of a packet and ...
1
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0answers
53 views
How to interpret traceroute with success on some routes and failing on other similar routes?
I have traceroute paths from 3 unique source hosts, to a single destination host (173.254.24.18). The final results of these three routes are including similar elements, and yet the final failing ...
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3answers
84 views
How can tracerouting a 192.168.x.x exit the local network?
In a LAN if I traceroute the IP address of any other machine, it gets it in one hop <1 ms.
However, there is one machine, which if I traceroute, it exits the private network, goes out through ...
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votes
1answer
34 views
Sanitise input for traceroute tracepath [closed]
Hi I'm after a way to sanitise input for traceroute/tracepath /well really any bash input.
For example:
root@meh:~# tracepath http://google.com/
gethostbyname2: Unknown host
I'll probably setup an ...
0
votes
1answer
104 views
Cannot Traceroute/ssh outside network
My server cannot connect to ANYTHING EXTERNAL via ssh. I also cannot traceroute to any of them. Machines on the same network work fine via SSH and traceroute. This machine is connected to the ...
-1
votes
1answer
55 views
Why does traceroute fail?
Let's say I traceroute to address A: 24.205.224.36
Here's what the start of the traceroute looks like:
$ traceroute -d 24.205.224.36
traceroute to 24.205.224.36 (24.205.224.36), 64 hops max, 52 byte ...
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0answers
79 views
Is there a traceroute command for VXWorks? Specifically a Shoretel Phone?
I can't seem to find if there is a traceroute command for VXworks online or specifically with a Shoretel phone. Once I telnet into the phone, I would like the ability to see whether packets from my ...
4
votes
1answer
62 views
traceroute continuing after destination?
What does it mean when traceroute continues after its destination?
For example; if I was trying to traceroute 4.4.4.4 why would something like the following occur:
13 x.x.x.x (xxxx) 26.966 ms ...
1
vote
2answers
87 views
Tracking actual packet path on a LAN
Is it possible to track the path a packet takes on a switched network. When I run a traceroute I get only the router and the destination. I know for a fact, however, that the packet must pass through ...
1
vote
1answer
64 views
Why there are always 10% of loss when testing with mtr command?
For example, if I run this command against example.com, with mtr command, I always get 10% of loss, no matter how many time I run, why exactly is 10%?
mtr --report 192.0.43.10
HOST: localhost Loss% ...
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2answers
116 views
how does traceroute resolve router names?
I found this fun little example of traceroute being used to output Star Wars stuff.
It came from http://beaglenetworks.net originally.
% traceroute -m 100 -U -p 3550 obiwan.scrye.net
traceroute to ...
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0answers
57 views
Test connection quality between 20+ remote locations [closed]
We're looking to measure
bandwidth
route
latency
between servers located at (20-30) locations across Africa.
One proposed solution is a script that would
launch an iperf server process for ...
2
votes
1answer
84 views
Putting router names in traceroute hops?
We have a number of sites that are interconnected via VPN tunnels. When troubleshooting issues I regularly find myself running traceroute to see the path the workstation takes to access a remote ...
0
votes
1answer
79 views
DNS name resolution with traceroute
i'm using my computer inside China to connect server outside country.
I tried many days a traceroute command to domain.com, that has ip address 114.157.42.212 and everytime the response is like this:
...
-1
votes
1answer
71 views
How to find out why website is not accessible? [closed]
I cannot access a certain website. There are two possible reasons:
The block is on the ISP side.
The block is at the website.
Is there a technical way to figure out which of these are causing the ...
0
votes
2answers
184 views
How to ping / traceroute an AWS ELB
Amazon's load balancers have a network security policy which swallows ICMP packets for both ping and traceroute. It is listed as security group amazon-elb/amazon-elb-sg. Personally I find these ...
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0answers
146 views
tcptraceroute for Windows CLI [duplicate]
Possible Duplicate:
traceroute TCP equivalent for Windows
How can I trace the path TCP traffic is taking through my netwok from the CLI of a Windows client? NB. NOT ICMP traffic, TCP ...
0
votes
1answer
45 views
Find the WAN adress for a customer (Linux console) [duplicate]
Possible Duplicate:
Finding the Public IP address in a shell script
I'm trying to problem solve a network Connection for a customer, and have to do a speed test on the network from Our ...
0
votes
1answer
73 views
trace route for WDS connected WIFI access points
I have ADSL router (WDS enabled) and two repeaters to extend WiFi converge range.
When I try to do a tracert (windows), the first hop is the gateway directly (not the WDS access point).
Is there any ...
1
vote
1answer
67 views
Non-accessible sites/IPs
Lately I've found that some sites and IP addresses aren't accessible. Some include forums and games website and even some commercial products that aren't related to each other or any malicious ...
0
votes
0answers
48 views
Slow website from one connection
One of the websites is very slow on response from one particular connection.
The trace route seems to be alright (total is ~110ms) but all pages of the site take much time to load.
It works properly ...
7
votes
2answers
743 views
Is it possible to include switches in traceroute hops?
I was wondering if it's at all possible to make a Dell Powerconnect 2848 switch show when running internal traceroutes. This would help with diagnosing issues and make it far easier to see where ...
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votes
1answer
103 views
Traceroute analysis [closed]
I have some strange results when i do traceroutes between to hosts within the same network. Traceroute works as expected but every 10 try round about i get this output
# traceroute myhost
...
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0answers
80 views
traceroute only showing gateway and destination ipaddress
I've never need this before, this machine is natted and the gateway returns only the destination ip address, none of the hops in between. An HP procurve switch is providing the natting.
...
0
votes
1answer
983 views
linux: traceroute send operation not permitted for remote server
When I try to traceroute to a remote ip, I get
send: Operation not permitted
When I stop iptables, traceroute works fine. So, I assume I need some ip rule for send. What would that rule be?
I did ...
1
vote
1answer
206 views
Ubuntu 12.04 as router with 2 nic
I have been trying this setup for weeks and still can not make this to work...
ubuntu 12.04 64 bit with 2 nic
nic1: eth0:192.168.2.33 -static ip with internet access (connected to modem)
nic2: ...
0
votes
1answer
188 views
TTL and traceroute showing different values for same domain
Why am I getting two different outputs for tracert and ping?
Ping Result showing total hops of 20 and tracert showing 8.
Default ttl value on my Linux machine 64, icmp echo reply ttl value 44.
...
1
vote
0answers
22 views
Configuring klg looking glass on Ubuntu [closed]
I am trying to configure klg looking glass and followed the klg_README.txt file. I think this klg_README.txt file is sufficient for expert guys. I am new with this tool. I have tried and could not add ...
5
votes
1answer
1k views
What does “!Z” and “!X” mean in a traceroute?
When you see "!Z" or "!X" in a traceroute, what does that mean?
Where is it coming from, and how do I fix it?
0
votes
1answer
85 views
Ping -r command [closed]
I was trying "ping -r" command, while my system(windows Vista) is at different level of routers connected in series, and it was failing after 2 levels, i.e. upto router3 router1->router2->router3 it ...
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votes
2answers
244 views
OSX cannot ping my server IP, however unix & windows can [closed]
We are having an issue with our Debian Server, we host several services on it each using several ports (all are open in iptables), all users can connect to these fine, except osx users.
We have got ...
0
votes
2answers
303 views
What's going on with traceroute?
The following is what happens when I run traceroute from a certain location:
# traceroute google.com
traceroute to google.com (74.125.227.39), 30 hops max, 60 byte packets
1 ...
0
votes
0answers
153 views
Linux: traceroute gets ENETDOWN, but ping works just fine
I have multiple servers with this problem:
Server is "talking to" a desktop (seen only across a router, so far), with SSH (or HTTP), and the session freezes. Further pings from the desktop get no ...
1
vote
3answers
105 views
Trace route not working on a corporate network
What would be reasons for blocking trace route functionality for clients on a corporate network?
3
votes
3answers
176 views
identify a router that cuts certain port
Is there a way to identify which particular router between me and some server blocks connections on certain port?
I am in a hotel in Thailand, where they have recently changed some settings in their ...
2
votes
2answers
183 views
Traceroute fails from one country and succeeds from another
We rent a server in Czech Republic where our web site is running.
When I trace it from USA, India, Russia or Ukraine everything is working fine, trace log shows that querying reaches the hosting ...
1
vote
1answer
180 views
different between tracert(windows) and traceroute(linux)
I'm tracing some server between tracert(Windows) and traceroute(linux) in the same network.
But the output is different.
tracert can trace the target server.
But traceroute can't.
The traceroute ...
10
votes
2answers
2k views
Does traceroute use UDP or ICMP or both?
When I do a trace on the www.google.com domain from my laptop, am I using icmp or udp ?
I thought it was icmp type 11 but while searching for something else I came across rules where icmp type 30 was ...
2
votes
3answers
784 views
What is the best server or Ip address to use for prolonged testing?
I usually run uptime/latency tests against (and from) two servers that we own at different sites and until recently I've used the google dns servers as a control group.
However, I've realized there ...
4
votes
1answer
276 views
How can I use ping with a large packet size to troubleshoot network issues?
What types of network problems can be identified with ping of a large packet size?
3
votes
2answers
251 views
ping -R and traceroute mismatch
I am stuck at a very strange result after running the command ping -R in a unix environment. To be more specific, I am trying to follow the path to a server and back but there is quite a mismach ...
3
votes
4answers
343 views
Determining cause of TCP/IP connect issue without traceroute
I'm trying to connect from a company network to a host (via HTTPS), but my attempts fail with timeout. I can resolve the host. I know the host is up. I know there is a firewall filtering by incoming ...
1
vote
2answers
156 views
Windows Program to Graphically Display Traceroute
Is there a windows program that allows you to visualize a traceroute on a geographic map?
12
votes
2answers
2k views
what does “***” mean when traceroute
this is the result of my traceroute
traceroute 211.140.5.120
1 141.1.31.2 (111.1.31.2) 0.397 ms 0.380 ms 0.366 ms
2 141.1.28.38 (111.1.28.38) 3.999 ms 3.971 ms 3.982 ms
3 142.11.124.193 ...
3
votes
3answers
218 views
Why traceroute don't work
I have some questions about why traceroute doesn't works in some condition. Though I understand how it works, I can't figure out some questions. Like,
$traceroute www.google.com
1 * * *
2 * * *
...
3
votes
3answers
797 views
Advanced traceroute tool for Linux
Is there comparable alternative for PingPlotter Pro on Linux? I'm looking for traceroute tool that has ability to display traceroute data of each nodes along the route in nice timeline graph.
4
votes
2answers
152 views
How is latency / travel time determined when you execute a traceroute?
This is simply a question placed out of curiosity. When you execute a traceroute, and get some time durations back for the latency/travel time, how are those calculated? It would seem more than ...
4
votes
1answer
169 views
Traceroute hits destination on fourth hop, then does 15 more
Traceroute is showing that I hit my destination (147.21.65.42) on the fourth hop. So why does it do 15 more hops?
From my location, the pipe to this server is an MPLS virtual private network. I'm ...
2
votes
3answers
95 views
How to get last TTL from Traceroute?
Which is the easiest way to get the last TTL with traceroute? The last line with IP or Host....
