In my college many proxy : port (like 144.16.192.245:8080)are using to get Internet connection, performance of each proxy changes, how can i decide which one is working well at particular time. is there any way to switch over them automatically ?

You can generally ping the IP and get a response time.

$ ping -c 4 <IP>
64 bytes from ir1.fp.vip.sp2.yahoo.com (98.137.149.56): icmp_seq=2 ttl=47 time=71.5 ms

Ping all your options and the one with the fastest time (lowest number) is likely the best one (at the time of the ping). Perhaps not the best depending on how it reacts down stream. But it's a start. There probably is a way to automate it. I'm not familiar with said way at this time. And ping may not work if it's blocked by firewall or other quirks. And best might vary depending on what you're trying to reach downstream and not the proxy in general. Sometimes just finding one that works is about as good as it gets.

0 members found this post helpful.

Not helpful ??? Well pardon me for trying. If you don't want help, then fine, don't ask for it.

it was my mistake sorry, i am new here , thanks bye bye

Dev, it is not a mistake to mark a post not helpful,

but it is wrong :
1. When you do not thank the person for trying.

2. When you do not explain what went wrong when you tried the suggested solution or the reason why you did not try the solution.

Whatever, benchmarking apparently has absolutely no bearing on determining which is best. In that case choose the one with the lowest number. It's obviously best as it's been in service the longest.

i tried ping option for proxy 144.16.192.247 and port 8080 as

$ ping -c 4 144.16.192.247
PING 144.16.192.247 (144.16.192.247) 56(84) bytes of data.

--- 144.16.192.247 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3022ms

and for proxy 144.16.192.145 and port 8080


$ ping -c 4 144.16.192.245
PING 144.16.192.245 (144.16.192.245) 56(84) bytes of data.

--- 144.16.192.245 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3023ms

is it ok ? why here "0 received, 100% packet loss,"

sir one more information i want to give 144.16.192.247 is an http proxy and port 8080 , is not IP address

ping doesn't use 8080, that's generally used for http at the user level. But ping sends a different type of packet anyway.

The ping does 3 things.

1) verifies that the IP is valid (or not)
2) verifies that the network reaches that address (or not)
3) gives a response time in how long it takes to talk to said computer across the network.
(the lower the number the better)

Assuming it's not blocked by firewall, yours or theirs.

#3 is no guarantee of a particular proxy being best. As even though you can connect to it the fastest, it's no indication of how it performs on the other end of that chain. The only way to really know is to just use all of them and then adjust to the one that is best (at that particular moment in time for that particular use). It's all pretty much an effort in futility though. If your school had a better network you wouldn't need to do any of that. And it's not a skill that's going to make you millions or even minimum wage out in the real world.

2 members found this post helpful.

thank you for this nice information