Questions tagged [traceroute]
89 questions
2
votes
1 answer
traceroute: sometimes routers don't respond and user sees timeouts
I'm an admin of small network and I'm investigating a problem my users complain about. The root of their complaints is traceroute: sometimes routers along the path simply don't respond to traceroute probes and users see timeouts (those *s in place…
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ico
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- 1
2
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3 answers
Can Traceroute detect a load balancer?
Can traceroute detect a load balancer sitting between an application server and a database?
After running a traceroute from application server to database I only received one hop. The hop was the destination database
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ASalas
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- 2
2
votes
1 answer
What may cause a request being sent with a TTL of 64 to fail on connection to a destination ip that traceroute shows is 33 hops away?
From within a docker container (running ubuntu 18) running on AWS ECS I'm attempting to establish a connection to an outside data center. We've troubleshot the issue to where we believe it's the extra hop added by the local docker network that is…
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cmikeb1
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1
vote
1 answer
Strange traceroute behavior when using iptables/nat to redirect an IP
At a client of mine, who has a LAN of 10.0.1.0/24, they have a Windows machine with ip 10.0.1.8 that hosts a rather old legacy application (that of course no one has the source code for) that wants to connect to a hard-coded IP address of…
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gordonfish
- 11
- 3
1
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0 answers
Why is my data throughput only 1G of possible 10G if I setup an ethernet bridge?
My setup is a Windows 10 PC with 10G card (LR-LINK 6880BT) and a Synology DS1618+ NAS with 10G card (Synology E10G18-T1). Both 10G ports are connected directly to avoid buying a 10G switch.
A) How the 10G connection works:
NAS eth4 (10G) is set to…
![](../../users/profiles/44086.webp)
mgutt
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1
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0 answers
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 to finish for any path that got routed through it…
![](../../users/profiles/491167.webp)
user1086516
- 111
- 2
1
vote
0 answers
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 manually it wont return to the prompt.
Anyone had this…
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Rob
- 11
- 1
1
vote
1 answer
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 10.14.255.29 (10.14.255.29) 0.492 ms 0.508 ms …
![](../../users/profiles/269256.webp)
davidrmcharles
- 111
- 4
1
vote
1 answer
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:~$ telnet a.mx.mail.yahoo.com 25
Trying…
![](../../users/profiles/163264.webp)
jcarpenter2
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1
vote
1 answer
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 results to send to the networking team.
Tracert…
![](../../users/profiles/429110.webp)
John Wu
- 121
- 4
1
vote
1 answer
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: 10.100.71.28
Traceroute to IP works:
root@pc:~#…
![](../../users/profiles/90324.webp)
guettli
- 3,113
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1
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2 answers
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 friend today and the only solution I've found is a full…
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Bravo Delta
- 140
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2 answers
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
*** Can't find server name for address…
![](../../users/profiles/228473.webp)
CodyBugstein
- 222
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1
vote
1 answer
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 access. So I'm using NAT Gateway to have static IPs…
![](../../users/profiles/392331.webp)
Magno Ferreira
- 13
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1
vote
0 answers
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 loading times, time out messages, and other problems…
![](../../users/profiles/223841.webp)
Dan
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