I know this is an old question, but i’ve also been in search for an answer. The previous answer does not make mention of the interval, so I searched through some code of some popular websocket frameworks. Not that this is official, but at least it gives a starting point: this repo makes use of … Read more
The awk solution is what I would use, but if you want to understand your problems with bash, here is a revised version of your script. #!/bin/bash -vx ##config file with ip addresses like 10.10.10.1:80 file=config.txt while read line ; do ##this line is not correct, should strip :port and store to ip var ip=$( … Read more
Given that I had to write a TraceRoute class today I figured I might as well share the source code. using System.Collections.Generic; using System.Net.NetworkInformation; using System.Text; using System.Net; namespace Answer { public class TraceRoute { private const string Data = “aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa”; public static IEnumerable<IPAddress> GetTraceRoute(string hostNameOrAddress) { return GetTraceRoute(hostNameOrAddress, 1); } private static IEnumerable<IPAddress> GetTraceRoute(string … Read more
I would suggest using nmap’s ping-scan flag, $ nmap -sn 192.168.1.60-70 Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2009-04-09 20:13 BST Host machine1.home (192.168.1.64) appears to be up. Host machine2.home (192.168.1.65) appears to be up. Nmap finished: 11 IP addresses (2 hosts up) scanned in 0.235 seconds That said, if you want to write it … Read more
I used ping to calculate bandwidth in local network. I think it’s as accurate as other means of measuring bandwidth (e.g. downloading a big file). You can use it too for your internet connection if you have a symmetric link to the internet (i.e. not adsl). Here’s how I do it: I have a gigabit … Read more
ICMP means Internet Control Message Protocol and is always coupled with the IP protocol (There’s 2 ICMP variants one for IPv4 and one for IPv6.) echo request and echo response are the two operation codes of ICMP used to implement ping. Besides the original ping program, ping might simply mean the action of checking if … Read more
ping (ICMP protocol) and ssh are two different protocols. It could be that ssh service is not running or not installed firewall restriction (local to server like iptables or even sshd config lock down ) or (external firewall that protects incomming traffic to network hosting 111.111.111.111) First check is to see if ssh port is … Read more
Have a blast at The Ping Page, which has a link to full source on the original Unix ping(8).
I think the answer to this question pretty much sums up the problem with your question. If what you want to do is find out whether a given host will accept TCP connections on port 80, you can do this: $host=”193.33.186.70″; $port = 80; $waitTimeoutInSeconds = 1; if($fp = fsockopen($host,$port,$errCode,$errStr,$waitTimeoutInSeconds)){ // It worked } else … Read more