Open Port for memcached

[theashman]

Hi there,
Im new to RHEL5, but comfortable with linux in general. Im trying to setup a dedicated memcached server for my webservers.

currently our setup is as follows:
a load balancer,
two servers attached to the load balancer
a new server to run dedicated memcached

Ive installed memcached and started the service.

we also have another testing server on the same LAN.

Im testing a PHP application using memcached and get a cannot connect error.

This lead me to think that the port wasnt open. So i googled how to open the port and it returned a few results doing the same, so i tried to follow.

The suggestion was to open the port using IPTables, so i tried to edit the iptables config.

i added the suggested line and tried to restart iptables but it failed.

"Applying iptables firewall rules: iptables-restore: line 1 failed"

so i removed the line i added and tried to restart, but got the same error.

Am i going about this the right way?

Thanks
Ash

[Irithori]

Is there even a firewall to poke holes into?
That iptables rule (which, by the way?) might not be neccesary.
You can check with iptables -L -n

Some questions:
- Is memcached running?
- Which IP is it bound to?
- Which port? 11211 is the default afaik

If all of the above is given,
try to telnet to <IP> and <port> on the memcache server.
If you dont get a "connection refused", but a connection of some sort,
go to the php server and do the same telnet.
If you still get a connection: congratulations. memcache is up and running.

From now on, you can concentrate on php.
It needs the pecl memcache extension.