mod_url enables httpd to support multibyte characters like Korean file, so you can download Korean file (한글파일) from your apache server without any error message. httpd basically does not support it, so you should install mod_url.

STEP 1. Download mod_url from KLDP and deploy it

tar xvfj 2186-mod_url-apache2-
cd mod_url-apache2
/usr/bin/apxs -iac mod_url.c

STEP 2. Modify /etc/httpd/conf/httpd.conf

Below code needs to be added

### mod_url
<IfModule mod_url.c>
CheckURL On
ServerEncoding EUC-KR
ClientEncoding UTF-8