slow apache/php-fpm in local server accessing with domain (through nat)

I have setup a local webserver to develop my php apps, everything should be working ok (no problem testing the domain through a proxy website), but when I navigate from local, sometimes the request won't finish loading (it keeps loading for a while but never throws a 500 error or something like busy server, it eventually finish loading).

Apache is configured to listen to my private IP and the port (both 80 and 443) is open in the router (pointing to my IP too). The domain is pointing to my public IP (that is dynamic but it doesn't change too often).

# httpd.conf
Listen 192.168.1.10:80
ServerName *public ip*

# httpd-ssl.conf
Listen 192.168.1.10:443

I have a default vhost (the first one) for port 80 (in it's httpd-vhosts.conf file) and another one for port 443 (in it's httpd-ssl.conf file) with it's own ssl (auto-signed) certificate. The rest of the vhosts are in the vhosts folder, using the wildcard *:80 and *:443 because I couldn't make them work with their domain/subdomain names (I already read about name based vhosts but nothing). They are properly configured and working ok, though.

I don't think it's a php-fpm problem because I tried a subdomain that doesn't use the php handler at all (in fact, it's set to use the default handler for all files in its vhost block). The php-fpm configuration for apache is set on each vhost block as needed, I don't have a single file for it. Is this ok? (And a quick question about php and fpm, does php have its own log file when using fpm? Or is everything logged into the php-fpm log file? I set the error_log in php.ini but nothing is logged, not even the file is created)

I have set the loglevel to debug, but I really don't know where the problem could be (it even may be a nat problem): http://pastebin.com/cTjyxwYf

I see gaps of 2 minutes, that's when I click and it keeps loading, maybe it's a nat/router problem. Any way to fix this?