PHP cURL function -

we have develop curl function on our application. curl function map data on 1 site our form-field in our application. however, function has been working fine while , ready use more 2 months. yesterday, fucntion broken down. data website no longer able map over. trying find out why problem is. when troubleshooting, shows there response timeout issue.

to re-ensure there nothing wrong on our coding , our server performance working, have duplicates instance server , try out function. working perfectly.

1. wondering if 1 out there facing such problem?
2. what possibility cause issue?
3. when using curl, site owner know calling data map ours server application? if so, there way can overcome this?
4. could owner block our server ip address? tht's why function works on server not in original server?

appreciate on this.

thank you,

1. your problem description far generic determine specific cause. there specific block in place.
2. for example firewall rule on other end, or on end, cause traffic dropped, causing timeout. there regular network outage between both servers, that's unlikely.
3. yes, see in apache (or iis) logs regularly. no, cannot hide server logs - logs successful requests. either data, or stay stealthy. not both.
4. yes, webserver logs contain ip doing requests. adding drop rule firewall trivial task.

i have applied such firewall rule bandwidth and/or data leechers lot of times in past few years, although prefer more resilient deny 1.2.3.4 approach in apache vhost/htaccess. usually, if use else's facilities, it's nice ask proper permission - lessens chance blocked way.