linux - what does "***" mean when traceroute - Server Fault
All implementations of traceroute rely on ICMP (type 11) packets being sent to the originator. This program attempts trace route by launching UDP probe packets with a small ttl (time to live) …
linux - What does having * * * mean in the command traceroute
Nov 1, 2015 · What does having * * * mean in the command traceroute ? and How can you cope with that situation? Ask Question Asked 10 years, 1 month ago Modified 6 years, 2 months ago
traceroute TCP equivalent for Windows - Server Fault
I'm trying to determine where connectivity to an external host using a specific TCP port is being blocked. Traceroute for Windows only uses ICMP, and telnet will only tell me that the port is …
Does traceroute use UDP or ICMP or both? - Server Fault
Traditional traceroute uses UDP on incrementing ports for every hop. You can use any sort of packet to implement it - ICMP, TCP SYN, etc. All it takes is the IP packet expiring and you are …
Perform traceroute with specific outgoing IP - Server Fault
Dec 10, 2015 · Now one /24 subnet has connection issues and I need to perform a traceroute to see what's wrong. How can I have my server using one of those IPs as outgoing IP address …
traceroute does not work, output is * * * but network is fine
Jun 21, 2010 · traceroute does not work, output is * * * but network is fine [closed] Ask Question Asked 15 years, 5 months ago Modified 4 years, 1 month ago
What do the three columns in traceroute output mean?
In Windows, the traceroute tool will give you the hop number, three columns showing the network latency between you and the hop (so you can average them if you like), as well as the IP …
How to verify a AWS VPC (S3) endpoint works? - Server Fault
Dec 28, 2016 · I added a VPC endpoint to my VPC using CloudFormation, and allowed s3 usage. The routes are visible in the AWS console, but not in the local routing tables of the EC2 …
How to ping / traceroute an AWS ELB - Server Fault
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 …
traceroute shows stars but netcat reaches the port
Jul 21, 2022 · This will also happen if there is a firewall in between which simply discards all UDP packets. And this kind of firewall would also produces the output you see with traceroute: if …