Questions tagged [traceroute]

traceroute is a common networking utility to determine the path a packet takes to a target IP device.

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How to understand the output of traceroute?

I see some entries have multiple rows. Does anybody know why? Thanks. $ traceroute 8.8.8.8 traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 52 byte packets ... 8 108.170.252.129 (108.170.252.129) 36....
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Why is this international internet traffic routed so inefficiently? [duplicate]

Being located in the Philippines/Asia, I did a traceroute to a datacenter in the Netherlands/Europe: traceroute to www.transip.nl (37.97.254.1), 30 hops max, 60 byte packets 1 _gateway (192.168.0.1)...
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What explains this poor intercontinental internet bandwidth? (Asia to Europe) [closed]

I am using fiber internet supplied by the PLDT (a major ISP in the Philippines). The fast.com speedtest website (by Netflix) records roughly 24 Mbps (3 MB/s), which is according to my internet plan. ...
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I can't access most sites using IPv6. Is it an issue with “Level 3” network?

Note: I'm not a network expert, and I don't have deep knowledge about IPv6. Recently, IPv6 connectivity seems not to be working here. (Tested through Firefox) The funny thing are, when doing a ...
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Route given by traceroute and ping does not match routing table

I have a network of over 100 hosts running CentOs 7 With Quagga installed on all of them. Between certain hosts, the route given by traceroute (and incrementing ttl flag with ping) does not match the ...
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Why does traceroute time out when I try it on certain hosts?

I have a large LAN set up with over 100 hosts. Most of the time traceroute works fine, but in certain cases between two particular hosts, it times out. I have tried the default traceroute as well ...
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Traceroute not doing reverse lookups

I know for a fact that traceroute in Linux should also reverse lookup the IPs to their hostname but on my pc (running Arch Linux) it doesn't while on my Raspberry Pi the same command (issued from the ...
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Is there a way to configure traceroute such that the -T or -I flags do not require root privs to perform?

I am using Centos 7. Basically I just want any user to be able to do a ICMP or TCP traceroute. Is there a way to configure traceroute such that the -T or -I flags do not require root privilegess to ...
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Configuring OpenVPN Client ByPassing all the traffic to ISP Traffic via Secured Tunnel

Looking at the two Routing Tables, even after the VPN is up all the traffic to the wider Internet is still going via an ISP, not across your tunnel, with the gateway of 192.168.43.1 before or after ...
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Getting firewalld to allow traceroute for centos 7

We have a server running CentOS 7. There is a weird situation where I can ping to the server from my firewall but was not able to perform a traceroute. The server is a directly connecting to the ...
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Traceroute: destination IP-address returned for all but first hop. (Debian 9.11)

At some point in the past year, Traceroute behavior changed. Was working correctly prior. (Debian v9.11 Traceroute 1:2.1.0-2) Now, first traceroute result, my gateway, is correct, but all the ...
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Why does the mtu value differ on different traceroute attempts?

I came across two tracepath measurements: mininet> h1 tracepath -n 2001:638:709:b::1 1?: [LOCALHOST] 0.040ms pmtu 1500 1: 2001:638:709:a::f ...
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How can ping/ tracepath derive the path MTU info? [closed]

How exactly do ping and tracepath manage to obtain info on MTU?
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Why do I sometimes get a traceroute that makes four internal LAN hops before reaching the WAN?

Why am I getting both 10.x.x.x and 192.168.x.x internal IPs each time I tracert? I am using a Hitron CGNM modem/router combo provided from my ISP. If I run a tracert I get something like: 1 20 ...
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Strange issues with Wget, DNS, traceroute and VPN on router using BusyBox

Wget is not working on my router anymore because DNS queries from the router are returning IPV6 as “Address 1” and IPV4 as “Address 2” and wget (in BusyBox on the router) does not support IPV6. Take ...
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Can't PING but can TRACERT from Comcast Xfinity to Comcast Business Class IP

Every once in a while (last occurrence was Oct 2019) I cannot connect to my Comcast BusinessClass IP address from my Comcast Xfinity residential site. From the Xfinity gateway (admin tools) to the ...
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Tracert throws up an error with -R option

When I use tracert without any options, it runs fine. As in: tracert google.com But when I run it with -R: tracert -R google.com It throws up the error "Unable to resolve target system name ...
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Interpret the output of these traceroute commands

I've been getting unusually high ping (~180ms) to the League of Legends OCE server (Australia) when playing from NZ, and so I've done a traceroute for the IP of the server. Is anyone able to give ...
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1answer
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Tracert tracing to different ip than the one returning from who is [closed]

I am trying to figure out why I cannot access a specific website from my office network. If I visit this site from another ip then there is no problem. I can visit also other websites hosted in the ...
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Double Nat Detection

I am trying to figure out if I have double NAT so I ran some traceroute. First I set my router in NAT mode and ran traceroute 8.8.8.8 Here the result traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 ...
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How to use Traceroute --mtu on Mac

I am trying to do the following Traceroute --mtu google.com however I get a usage: traceroute [-M first_ttl] etc giving me all the command lines. How can I use --mtu with traceroute on mac? I am ...
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mtr output: last entry is repeated on all hops

Whenever I run mtr, it briefly shows a single hop per line, then upon reaching the last hop it shows up as a duplicate entry on all other hops: My traceroute [v0.92] [local ...
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pathping shows PC hop twice with 100% packet loss

The pathping to 185.60.112.157 (game server) shows my PC hop twice, the second time with 100% packet loss back from the router.  Is this an issue? Since "Lost/Sent" after this hop are all 100% packet ...
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Why our website is not reachable from our office (static IP) but works fine on other ISP?

From our office, we can't reach our website anymore. But from home (or other ISP network, ever from cellphone), it is reachable!  I performed a traceroute from office and the data stop at 116.251.117....
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Can't ping to VM on another computer, even with route table entry

I have 2 computers. Computer A is running a VM, which is behind a NAT. Computer B just wants to PING that VM. I know that VM behind NAT is intended to be inaccessible from the outside, that's why NAT ...
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MacBook can't connect to Raspberry Pi on LAN (but Linux box can)

I can do an nmap and discover my devices on my LAN, but when I try to ping them, I get 'Request timeout for icmp_seq 0'. I can SSH to a machine outside my LAN, but when I try to SSH to a Raspberry ...
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Find the average RTT with the asterisks

These two pictures present the results after running a tracerout I want to find the AVG RTT for each line but dont know the value of the asterisks should I put a zero and then find the avg of all of ...
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Why is Nmap traceroute so fast?

Using Nmap's traceroute option shows only one hop and is extremely fast. I understand it works differently than traceroute in that it tries to guess the right TTL instead of beginning with 1. But ...
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If traceroute result returns more than one gateway in one hop, what is the path of the destination host?

I performed trace route in Linux, the traceroute result give me more than one gateway in each hop. How can I find the routing path to my destination? Please refer below output: traceroute to ipv4....
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Is it normal to get some request timed out in tracert?

I was wondering if it's normal to have some request timed out in tracert. For example: C:>tracert www.google.com Tracing route to www.google.com [216.58.210.36] over a maximum of 30 hops: 1 10 ...
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Cannot reach my OpenVPN server from outside anymore

I've been using my Raspberry Pi as an OpenVPN server for a long time but I noticed that, after my father called the Telecom's customer support (Telecom is an Italian ISP) because of a problem with ...
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What cause packet loss on my network?

This is my trace test from my PC to google.com 1 1 ms 1 ms 1 ms 192.168.1.1 2 23 ms 23 ms 23 ms host-41.236.127.1.tedata.net [41.236.127.1] 3 27 ms 27 ms 28 ms ...
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Wifi Latency : modem or internet carrier?

I would like to know if problems I have in wifi depends on the internet provider or the wifi. Mac OS 10.9.5. Router D-Link. Wi-Fi Frequency 2.4Ghz. The internet providers says the signal is ...
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3answers
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Multiple private addresses in my traceroute results

First of all, I am aware this question has been asked before in here, here and here. But it didn't have the answer I needed. so here are my traceroute results: 1 4 ms 5 ms 4 ms ...
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2answers
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Run a tracert continually for period of time

I have a site where network speed and specific network related activities become very slow. I want to run a tracert from one of the PC's onsite to, say, a file server or print server located at our ...
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traceroute shows just * * * in linux ( in a virtual machine ), although displays all IPs in windows correctly

I did tracert to google in windows PowerShell and IP addresses of all stations are displayed properly. However, if I do the same in Linux in a virtual machine to the same server, I see only * * * . ...
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traceroute in Ubuntu

I'm using Ubuntu 18.04, and I don't have traceroute, even I've just done, sudo apt-get install traceroute So I checked, and indeed traceroute package don't have traceroute program: $ dpkg -L ...
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How do I find out what this unknown device is on my network?

Backstory: I have a home PC network that is mixed hardwired and wireless, with a wireless access point and hardwired PCs - connected to a dual-WAN capable router, connected to a cable modem, connected ...
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939 views

Traceroute on a hop gives timeout

I was just looking into traceroute and trying to understand it's behaviour. Theoretically I get how IP routing and how traceroute work, but this case baffles me. traceroute to google.com.ar (172.217....
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Windows 7 how to do simple traceroute with ping? [duplicate]

On mac, I can do this: > ping -DRo computerhope.com https://apple.stackexchange.com/questions/125068/is-there-an-equivalent-utility-to-linuxs-tracepath-for-os-x And it will basically do a simple ...
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537 views

How do I get tracepath (not traceroute) for cygwin?

I need the tracepath utility (not traceroute) on my Windows 7 cygwin. "The main difference between the two is that you need to be a superuser on a Linux computer to use traceroute, whereas tracepath ...
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2answers
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How does the IP address of a gateway in a static route affect routing

I have been using a Windows 7 computer to connect to a Windows 10 computer which is on the same physical network but on a different subnet. Before I added a static route to Windows 7 all traffic was ...
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1answer
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How to find out which network device is used to reach a given server

I have an overly complicated developer network setup with Ethernet, WLAN and VPN. I can connect to certain server but I need to know which actual network device / router was used to make the ...
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tracert shows different responses from different laptops. Is it normal?

I recently noticed the following. Is this normal? Running two laptops side by side, one tracert command shows responses along the routers from modem all the way to 8.8.8.8 At the same time, the ...
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1answer
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why is there a delay in showing the IPs in traceroute?

I use traceroute in windows and as usual I get the delays and the IP addresses of the routeres. In each row, after printing the three delays, it takes a few second before printing the IP address. I ...
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Tracepath not working in Centos 7 with Vagrant

I'm attempting to use tracepath to get the traceroute for a bunch of URL's, but it's not working correctly. For every URL I try It just returns the same result e.g [vagrant@centos7 ~]$ tracepath ...
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Why traceroute on Windows is named tracert - book that I am reading is claiming that there is some historical context

The book called "UNIX and Linux System Administration Handbook, 5th Edition" on a page about traceroute, in the footnote is saying that "Windows have it's own version, named tracert (special points on ...
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1answer
237 views

Why does traceroute increment the destination port by 1 for each probe it sends?

I captured the packets sent by Traceroute using Tcpdump. Here is the screenshot Tcpdump below. Why does traceroute increment the destination port by 1 for each probe it sends?
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How do I check what networks devices are being used to connect to a website?

The question is pretty straightforward.. So, when I connect to www.google.com for example, is there a command for me to identify the network devices between my computer and the website? If I use ...
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The number of the results per hop in traceroute request : fixed on 3 or variable [closed]

I am analysing some traceroutes, I found 6 columns instead of 3 per one hop. My question : the number of results per hop depends on what?

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