REST Service in VBCS - 502 Gateway error

Summary

REST Service in VBCS - 502 Gateway error

Content

we had published our REST API and is able to retrieve with POSTMAN, however when we create service connection, we get below error:

{
    "type": "HTTP://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.1",
    "status": 502,
    "title": "Bad Gateway",
    "detail": "{\"type\":\"abcs://proxy_problem\",\"title\":\"Internal error invoking remote service\",\"detail\":\"Connect to 10.124.253.16:8080 [/10.124.253.16] failed: connect timed out\",\"status\":502}"
}