Ask MetaFilter questions tagged with tracert

Quickest and easiest way to figure out IP names.

Carillon — Mon, 25 Oct 2010 12:33:23 -0800

I have a list of IP addresses and I need to know the name of the computer they are currently hosted on. What's the best and quickest way for me to get this information? By this I mean if I use nslookup, what interests me is the name part of that printout. If this were just 5 or so IP addresses, I would be fine, but there a lot, over 400 and I don't want to do them all by hand. Any and all advice would be appreciated. I'm not attached to any specific method so long as I can run it under windows xp.

Can't access one specific site

The True Wheel — Thu, 09 Sep 2010 23:25:46 -0800

How do I refresh someone else's IP? I can't load a specific site I usually access every day when I am connected to my home ISP, although I can get to the site when I'm at work and on my smartphone. Absolutely NONE of my browsers can load the site, even those which I've never uised to visit the site before. When I contacted my ISP tonight, the tech said that he could access the same site from his computer, so it doesn't appear to be a DNS issue there. I have no problems loading any other sites on my browsers. What gives? I can't successfully ping the site, and when I run tracert, I can get as far as the IP my tech support says is just short of the web site's IP (he can run tracert successfully from his computer all the way to the site, which also loads in his browser). When I emailed the site owner, I was told to refresh the IP. So how do I do that? (Releasing and renewing my own IP obviously isn't the answer).

How to make pages load faster?

H. Roark — Sat, 21 Mar 2009 10:47:03 -0800

What can I do about some hosts making web-page loading very slow? Specifically, ad.doubleclick.net is killing me. Only in the last month or so, but sites like metafilter take ~1minute to load. This is Firefox on osx. Usually it says "connecting to ad.doubleclick.net...".

A simple "ping" command looks not to promising either:



computer:~/projects/datamining chris$ ping ad.doubleclick.net

PING ad.3ad.doubleclick.net (216.73.86.152): 56 data bytes

--- ad.3ad.doubleclick.net ping statistics ---

234 packets transmitted, 0 packets received, 100% packet loss

and a traceroute seems to go nowhere?



computer:~] chris% /usr/sbin/traceroute ad.doubleclick.net

traceroute to ad.3ad.doubleclick.net (216.73.86.152), 64 hops max, 40 byte packets

 1  192.168.1.1 (192.168.1.1)  1.352 ms  0.615 ms  0.534 ms

 2  * * *

 3  * * *

 4  * * *

 5  * * *

 6  * * *

 7  * * *

Unable to reach site from home, but fine elsewhere!

lemonfridge — Sun, 13 Jan 2008 10:25:02 -0800

Since around new years eve I have been unable to reach my website from home. Email has also stopped working. BUT, if I can reach it from work and other places, just not at home. What's going on and how do I fix it? I live in the UK. My ISP is Pipex.

3 Win XP machines, one iBook. All connected (one wired, the rest wireless) through a Netgear DG834G router to 4mbps Broadband.

I called Pipex support who asked me to perform a Tracert and email it to them. I did, but haven't had a reply. This is what I sent them.

The domains I am trying to reach are:
lemonfridge.com
chrisgunton.com
sedas.net

lemonfridge.com hosts the other 2. sedas.net is my dads business website - he hasn't been able to access it or his email since New Years Eve which is why I am under a bit of pressure to get him back online.

Any ideas?

(Using the software Hotspot Shield will let him get to the site and download email, but not send replies. This is working as a short term solution)

Monitoring site-to-site internet latency how?

jfuller — Sun, 02 Dec 2007 11:21:24 -0800

I'm searching for a utility that monitors the speed of an internet connection from a hospital on this side of town to one on that side of town. There is a special consideration. (I didn't think it would be so special when I started looking, but apparently it is.) The radiologists who read our xrays are a partnership that also reads for the other hospital in town. At each hospital they have one one XP-based reading station with a DSL connection and a vpn to the other hospital, in case they need to look at a particular study that wasn't done at the hospital where they're physically sitting. Lately they have been telling me that the response time for opening one of our studies on the PC at the other hospital has become unusably slow in the evenings, roughly 8pm to 10pm.

The rads know enough to turn the vpn off and test the system with one of the internet measure-your-DSL-speed sites, and they say all these sites say their connection speed is fine. But that only tests the speed over the internet path between that hospital and the test-your-speed site. If there were a slowdown at some node that isn't on that path (but is on the path packets take when they travel between the two hospitals) that kind of test won't find it. I am not a network engineer but it seems to me that this is a job for a continuous traceroute (or some alternative like pathping or Layer Four Traceroute) left running for a couple of days.

There are tons of programs that do this kind of thing. I've looked at examples like pingplotter and Path Analyzer Pro and WinMTR and even some hard-to-find abandonware like Neotrace. But the special ability that seems (surprisingly) to be uncommon is not just to average the speed over the time a program is collecting data but also to preserve the ups and downs so that after running, say, from 6PM today to 6PM tomorrow I could look and say, "well, it's fast enough at 6 and at 7 but hey whoops it really slowed down at 8 and didn't get well until after midnight." The only program I've seen that may do this is pingplotter--there are a couple of screen captures on their site that show what looks like a smallish graph of latency and dropped packets over time. But I can't be sure, the downloadable evaluation version is feature-limited and definitely doesn't do this. The eval version of Path Analyzer Pro is time-limited and has all the (very many, and cool) features of the full version but if it preserves and displays speed-vs.time data I can't find it.

At this point I'm reluctantly tempted to do this the mouthbreathing way, by writing a batch file that runs a command-line tracert to our site a few times and appends the output to a file, and then firing this batch file off every fifteen minutes for 24 hours with the scheduler. That makes a really ugly text file of data that I would have to clean up and parse with win32 sed and then import into excel to graph it up all pretty.

Can anyone point me to a better solution than that? Neither hospital will pay to solve this, each says it's the other one's problem. If there isn't any likely freeware for the job I could probably put 20-30 bucks of my own into it, but there's no use telling me how great SolarWinds is.

Thanks very much!

Website cannot be reached - Why?

TauLepton — Sat, 12 Aug 2006 15:14:52 -0800

TechFilter: Why can't I browse/ping/tracert to tikiwiki.org? Several people have told me (via IM) that they have no troubles reaching tikiwiki.org (84.207.3.18). However, when trying to get there from my home OR work computer...timeouts.

Tracert stops at the same server:
--cont from the route--
pos9-1.mpr2.cdg2.fr.above.net [64.125.23.10]
te1-4.er2b.cdg2.fr.above.net [64.125.23.33]
62.4.73.12
timeouts galore

I do understand basic info about how the net works - so why won't this take another route when it encounters a problem?

I'd really like to install the software as our main wiki, but without access to the support community that seems like an exercise in futility.

Question 1: Why is this happening/why won't another route be explored?
Question 2: How can I reach the website?

Thanks!

How to make the Windows firewall play nice with tracert?

stopgap — Wed, 14 Sep 2005 09:12:32 -0800

WinXP question: tracert only works when the Windows firewall is turned off. I've added \windows\system32\tracert.exe to the approved programs list, but no luck. Any ideas?