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I am using aws server with 2 instances one say "x" and another as "y" and using ibox sms gateway. Previously I was using server x for my work and also integrated sms gateway in it. All was working good. But now I am using server y for my work with same code used on server x, but sms gateway is not working. Tried again on server x but it is working condition, but in y it not works. Thanks in advance.
"Not working" is too vague, you need to do some diagnostics / problem solving. You should look into security groups and network ACLs to see if they're blocking connectivity to the gateway. The gateway may only accept data from a specific IP address. You could ping the gateway from both machines to see if there's a problem, but ping ICMP is often blocked and may not give useful information. – Tim – 2017-07-13T20:07:56.590