i've clients behind my linux box. here is the yahoo ping timing from one of my client's pc

C:\Documents and Settings\Razib Shahriar>ping yahoo.com -t

Pinging yahoo.com [216.109.112.135] with 32 bytes of data:

Reply from 216.109.112.135: bytes=32 time=281ms TTL=54
Reply from 216.109.112.135: bytes=32 time=285ms TTL=54
Reply from 216.109.112.135: bytes=32 time=280ms TTL=54
Reply from 216.109.112.135: bytes=32 time=285ms TTL=54
Reply from 216.109.112.135: bytes=32 time=284ms TTL=54


is there anything i can do in my linux box so that ping reply from yahoo.com can be less then 50 ms.

more bandwidth, better isp, different country... if you use a tool like mtr or even normal traceroute, you can see the delay between each hop, which would show you where things are getting held up.

thanks for your reply,

i know all about this. i want to know is there any way (like using scrpit in linux box) where i can tell if someone ping to specific ip the reply will go 100 ms lesser then real ping time.

thing is something like ......... i've a poor bandwidth, but i want to show the icmp reply is good from certain site.

Sorry i don't understand what you mean.

No you can't alter a users perceived ping response. The time is calculated by the source host recording the departure and receipt times of the ICMP exchange. There's nothing in the packet that you can alter to change it. You could potentially forge a response to the ping from a local device, but why would you? It wouldn't take anyone long to realise that your lying to them as RTT doesn't just affect ping response is directly affects application response. Forging a ping response doesn't fix you basic problem of high RTT.

thanks pete,

its just R&d . never mind.