Error Upload File on Centos Server | ModSecurity: Access denied “MULTIPART_UNMATCHED_BOUNDARY” required

2 min readDec 29, 2020

I have error when trying to upload file on my web application using centos server. Then i do something like this :

I check my code for handling upload file and there’s nothing wrong, cause when i try in local server it’s work.
I check php.ini configuration for max upload file at /etc/php.ini then make sure Maximum allowed size for uploaded files and all it’s great. upload max file is 128Mb. But i’m still got error.

Then i check on log at /var/log/httpd/ssl_error_log and i got error message like this.

[Mon Dec 28 17:50:54 2020] [error] [client 172.69.35.48] ModSecurity: Access denied with code 44 (phase 2). Match of “eq 0” against “MULTIPART_UNMATCHED_BOUNDARY” required. [file “/etc/httpd/conf.d/mod_security.conf”] [line “39”] [id “200003”] [msg “Multipart parser detected a possible unmatched boundary.”] [hostname “ereport.ptp.co.id”] [uri “/sop_revisi”] [unique_id “X@m4in8AAAEAAElKIBoAAAAF”]

This error message said that Multipart parser detected a possible unmatched boundary. I don’t know what is it but when i search for solution. I must to comment some line on file /etc/httpd/conf.d/mod_security.conf.