howdy fellas! 🙂 today i had to setup apache reverse proxy with my transmission web interface. in my university wifi all ports are blocked other than port 80 and in order to access my transmission server i had to either setup an apache reverse proxy or make transmission daemon run on port 80.

for this, first you have to enable apache mod_proxy and mod_proxy_http modules.

sudo a2enmod proxy
sudo a2enmod proxy_http

next you need to edit the apache configuration file. so first open it with nano.

cd /etc/apache2/sites-available
sudo nano 000-default.conf

your default configuration file name might not same as 000-default.conf. provide the appropriate name.

next you need to add following configuration block to the conf file. here our goal is to access transmission web interface via http://mydomain.me/transmission instead of http://mydomain.me:9091

ProxyRequests Off
<Proxy *>
        AddDefaultCharset off
        Order Allow,Deny
        Allow from all
</Proxy>

ProxyPass /transmission http://mydomain.me:9091/transmission
ProxyPassReverse /transmission http://mydomain.me:9091/transmission

ProxyVia On

following isn’t the reason for HTTP 409 conflict error.
one thing to note is don’t add http://localhost:9091/transmission instead of http://mydomain.me:9091/transmission. in my configuration putting localhost instead of actual domain generated HTTP 409 conflict error.

save the file & exit. next restart the apache server and you are almost done.

sudo service apache2 restart

now you can access your transmission web interface via http://mydomain.me/transmission/web/. 🙂 so happy reverse proxying.

update *
note that you have to access transmission web interface via the exact url as above. if you loose or don’t add /web/ part you’ll receive HTTP 409 conflict error.