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Questions tagged [traceroute]

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When would a traceroute reach the target, then hop once more and return !H?

Consider the following traceroute (there are several possible X hosts): traceroute to X (90.91.252.X), 30 hops max, 60 byte packets 1 ec2-79-125-0-254.eu-west-1.compute.amazonaws.com (79.125.0.254) ...
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20 views

Add own Hop in Traceroute (LXC and Proxmox)

I have a dedicated server from the ovh company with the proxmox system installed and I have purchased several address classes for lxc. When I run traceroute to one of the LXC servers, everything ...
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1answer
51 views

How do I do traceroute/tracepath without any admin privileges?

Basically, I need to "trace a packet from my computer to the host" to diagnose a network issue and I do not need any fancy additional functionality. Redirect me to the right place if this is not the ...
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1answer
41 views

Tracert high latency [duplicate]

I have used tracert command to check local network status, at the second hop I get random- high numbers for latency,(attached file), but when I use ping the total latency has an average of 1ms. What ...
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0answers
27 views

Layer 3 Device ICMP behavior and impact on tracert

Is it possible to configure a layer 3 device to set the TTL of all ICMP echo request packets to zero and not send out ICMP Time Exceeded message ? If so, wouldn't this make it impossible for tracert ...
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0answers
22 views

Connection timout between two IP troubleshooting

I have a client with a webserver and a VPS server with a webserver and a mailserver. These machines have to exchange data via REST API but I have a problem, they are not reachable each other over HTTP ...
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0answers
33 views

Tracert doesn't return to prompt after “trace complete”?

I am trying to run some tracert via cmd in Windows, but both manually and via a batch script the trace doesn't progress after "trace complete". In the script it won't move to the next trace and ...
4
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2answers
121 views

tcptraceroute: Hop does not reply

AFAIK tcptraceroute is the best tool to check if a firewall is blocking the tcp connection to a service. (If you know a better tool, please let leave a comment) Some hops do not reply. See * * * ...
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3answers
74 views

Why does traceroute ended with additional hop after the destination?

If nothing block the traffic, traceroute normally ends with the destination IP as the last hop. (10.1.1.10 in this case) Normal traceroute would be like this. user@linux:~$ traceroute 10.1.1.10 ...
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0answers
20 views

Email timeout to 1 domain

I have recently noticed that some of my emails are not getting through to a particular host. My mail log shows connection timed out. If I run a traceroute if fails halfway. traceroute fail If I run ...
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0answers
58 views

website hosted in aws ec2 is not loading

I have a website hosted in aws ec2 which stopped loading since few days onwards no clue whatsoever, below the output of traceroute please help Tracing route to 126news.com [18.221.68.117] over a ...
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2answers
90 views

Add hop in tracert

Basically, I'm interested how to make one of my servers hop in tracert. My first server is located within DC in France My second server if located within DC in Russia I want my 1st server to be in ...
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0answers
28 views

Is there a traceroute equivalent for http applications?

My website is configured to be served by a CDN's network and I'd like to know how could I know exactly by which others HTTP applications my requests go through ? I'm interested in knowing how many ...
0
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1answer
68 views

Some IP addresses are unreachable due to invalid route

I want to connect to remote machines. The problem is that I can connect to every machine except one. After some invertigation I found that problem is in route. Here is example: PS C:\Users\Alex> ...
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3answers
807 views

Traceroute not returning result whereas ssh is working fine

Maybe it's a dumb question, so please bear with me as I am novice to networking. While trying to debug a connection problem to a server today I observed the following two things - I am able to ssh (...
1
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1answer
187 views

Why does traceroute -T add hops and intermediary asterisks?

Behold, traceroute without any options: $ traceroute google.com traceroute to google.com (172.217.4.142), 30 hops max, 60 byte packets 1 10.14.62.1 (10.14.62.1) 0.619 ms 0.685 ms 0.806 ms 2 10....
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1answer
3k views

telnet: Unable to connect to remote host: Connection timed out

Setting up a postfix server, trying to figure out why it's not working. Here's a command that I ran while troubleshooting. I expected to be able to connect, but could not. lol@foldingmachine:~$ ...
0
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1answer
320 views

Where does tracert get its FQDN? And why can they differ?

I'm running Windows 2012 R2 on four different virtual machines. I'm testing connectivity to a single IP address, e.g. 12.13.14.15. Telnet isn't working, so I'm running tracerts and capturing the ...
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1answer
663 views

Ping request timeout, followed by >10s times from laptop, but not from router

Using my router's built-in Ping diagnostic, I can ping sites and get times <100ms routinely. Using my laptop, or any other device, wired or wireless, I first receive a bunch of Request Timeout ...
0
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1answer
252 views

SSH doesnt work with both ends connected to VPN [closed]

I have an Arch Linux SSH/SFTP server connected to a PrivateInternetAccess VPN which I want to ssh into from an android phone. The problem is, if the phone is also connected to a PIA VPN, SSH hangs and ...
1
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1answer
172 views

Bad destination address: foo.bar.local

I don't understand why I get "Bad destination address" in the end. DNS works: root@pc:~# nslookup foo.bar.local Server: 127.0.1.1 Address: 127.0.1.1#53 Name: foo.bar.local Address: 10.100....
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0answers
276 views

Static route with local IP does not route locally

VPN client breaks routing table on Server by routing local IP to VPN subnetwork. I can't change anything in VPN client so I'm trying to restore route to my host so that apps using 192.168.1.2 as ...
0
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2answers
489 views

Is there a utility or way to get the PMTU/MTU of a remote system quickly?

Is there a utility or linux built in to get the PMTU/MTU of a remote system quickly (sub 1 second preferably)? If so what is it and what syntax does it require? Google searches have not been my ...
0
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1answer
676 views

Why would tracert command in Windows timeout except for last hop? [closed]

On my Windows 10 system on company network any time I attempt to run a basic tracert command to an internal or external resource (e.g. google.com) each identified hop results in "Request timed out" ...
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0answers
58 views

ipv6 traceroute giving different results for same subnet

we've problems with our ipv6 internet connectivity. For your understanding I've uploaded a simplified and anonymised network diagram. All clients in the internal network can ping each other using ...
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2answers
138 views

WHy is tracert working even though I changed my DNS settings to use a bad nameserver?

In my Network Settings in Windows, I've set my DNS settings to use addresses 192.168.2.239 and 192.168.2.238. These are both non-existing DNS servers. In cmd if I do nslookup www.google.com I get ...
3
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1answer
414 views

How can a server trace a route to a client?

I understand how a client can trace a route to a server (using traceroute, or tracert). But is there a way for a server to trace a route to a client? The problem is that I have a group of internet ...
1
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1answer
1k views

how to test if aws nat gateway static ip is up?

I started two EC2 instances in an Elastic Beanstalk autoscaling group in a VPC. The app on these EC2 instances needs to connect to a third party service that uses an IP address whitelist to allow ...
2
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1answer
406 views

Traceroute time is too long

I m using RHEL 6.5 and eth0 interaface Interface Ip is 100.x.x.x and when i traceroute to 100.x.x.x it showing one hop that too ip address of interface itself. For eg traceroute to 100.65.111.14 ...
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0answers
97 views

Slowness communicating with IP address hosted by Google Cloud via specific Internet Service Provider

We are running an app and website on Google Cloud servers and beginning a couple of days ago users running on a specific internet service provider (Time Warner Cable) are experiencing very slow ...
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2answers
60 views

Should traceroute be used to diagnose network latency issues?

I ran the traceroute command from Server A to Server B, two of the hops display a latency between 250ms to 480ms. However when running ping from Server A to Server B, the response is always within ...
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0answers
7k views

TCP traceroute to specific port?

Is it possible to use tcptraceroute to probe a certain port? The documentation in the man pages seems to suggest that the '-p' port flag is for UDP, and when used with tcptraceroute, is for specifying ...
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3answers
2k views

How does traceroute -T -p work?

My goal is to check weather the destination port (MySQL 3306) is able to connect. First, I tried with telnet but it showed No route to host $ telnet dest.com 3306 Trying <dest_ip>... telnet: ...
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2answers
2k views

why Ethernet MTU size is 1500? [closed]

Can somebody explain that why the Ethernet Maximum Transmission Unit was chosen to be 1500 bytes (why exactly 1500) ? It might have some historical reason.
1
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1answer
414 views

fast ping response, latency on traceroute

I have a very strange problem. In short pings to my wireless AP are low (around 1ms), however, once I do a traceroute, the latency to the AP (1st hop) suddenly jumps to ~1000ms. Any ideas what may be ...
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3answers
2k views

How is possible that the web site is down but the traceroute is ok?

I have a web site at BlueHost ("Pro" plan) that is down often. Firefox says: The connection has timed out The server is taking too long to respond. The site could be temporarily unavailable or ...
1
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1answer
430 views

MTR doesn't recognize IPs of hops

I am building an integrated network operations portal that ties together information from a number of resources. One thing I would like to understand is the topology of the network, and I am trying ...
2
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1answer
226 views

why when i use tracert in powershell,it doesn't return complete reponse?

i use tracert in power shell,but it can not show all path,some parts talks Request timed out. Tracing route to google.com [216.58.212.78] over a maximum of 30 hops: 1 33 ms 33 ms 32 ms ...
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1answer
4k views

How to find the initial values of TTL for your current operating system?

In this answer to a question related to interpreting the values of TTL from a ping operation it is said that the TTL values vary depending on the operating system. I understood more or less the ...
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1answer
178 views

What does !A meaning while doing traceroute?

When traceroute to a host IP, it gives message as Tracing the route to 192.168.3.11 , min ttl = 1, max ttl = 30 . 1 172.16.11.210 16 ms 0 ms 16 ms 2 * * * 3 192.168.30.1 ...
0
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1answer
204 views

Traceroute an IP address with apache tomcat

Is it possible to get the traceroute from an incoming http request in tomcat? What I would like to get is a list of all routing points that a http request took. Is that somehow technically possible ...
0
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1answer
4k views

Perform traceroute with specific outgoing IP

My server has multiple /24 subnets added via network-script files ifcfg-eth0-range0 Now one /24 subnet has connection issues and I need to perform a traceroute to see what's wrong. How can I have my ...
0
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1answer
88 views

View trace route through interface

I would like to know if is possible to view the packet hops after a firewall through interface. Lets suppose that I have a firewall that block UPD or ICMP, so when I traceroute something I get this: ...
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2answers
1k views

Tracert not resolving IP

I know this is propably a basic question, i did some research on the net as to the whys and hows and got only more confused. I wanted to ask why tracert returns this : Tracing route to youtube.com [...
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2answers
5k views

What does having * * * mean in the command traceroute ? and How can you cope with that situation?

this is the result of my traceroute traceroute www.google.com traceroute to www.google.com (216.58.211.228), 30 hops max, 60 byte packets 1 192.168.1.1 (192.168.1.1) 1.061 ms 1.709 ms 2....
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4answers
2k views

Why am I getting different results from two servers that located in the same destination network?

There's two servers with the same network IP, and the only difference between them is the last two numbers like: 37.211.15.247 and 37.211.166.178. The Hosting Provider claims that the subnet mask for ...
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0answers
22 views

Why do i get different results from two servers that located in the same destination network? [duplicate]

There's two servers with the same network IP, and the only difference between them is the last two numbers like: xx.xx.15.247 and xx.xx.66.178 When i try the command Tracert (Traceroute) to test the ...
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2answers
3k views

Any protocol used by TRACEROUTE ? ICMP or UDP [closed]

Any protocol used by TRACEROUTE : ICMP or UDP or IP ? Or use them all : Encapsulation ?
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1answer
455 views

Ping times change over time only to a certain server

The problem happens only to a certain server from a nearby country. When i test the ping to that server, i get 30-40 ms today, then tomorrow i'll get 240-250 ms. Sometimes, an hour later it'll be 50-...
5
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1answer
728 views

Some visitors cannot access my website

I am receiving some reports from different clients in Spain, US and France that they cannot access my website, https://www.ultreyatours.com. They get a ERR_NAME_NOT_RESOLVED error saying the server ...