Basic iptables for a webserver: SSL Tomcat, postgres, ssh and that's it.

Posted by Paperino on Server Fault See other posts from Server Fault or by Paperino
Published on 2010-05-23T05:29:47Z Indexed on 2010/05/23 5:41 UTC
Read the original article Hit count: 266

Filed under:

ssh

|

ssl

|

tomcat

|

iptables

|

postgresql

This is probably as basic as it gets but I'm a developer and really have no experience with iptbles.

The only connections I need opened are:

eth0 (outward facing)

ssh
ping
SSL to tomcat (forward port 443 to 8443)

eth1(local subnet)

connection to postgres server

Everything else should be blocked. My current attempts seem to be leaving all other ports open. I wonder what gives.

Thanks serverfault!

© Server Fault or respective owner

Related posts about ssh

Problem with hadoop start-dfs.sh

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I installed and configured hadoop on my Ubuntu 14.04 server, virtualized inside of hyper-v, however I am getting an issue when i run start-dfs.sh root@sUbuntu01:/var/log# start-dfs.sh 14/06/04 15:27:08 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java… >>> More
SSH problems (ssh_exchange_identification: read: Connection reset by peer)

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I was running 11.10 and decided to do the full upgrade and come up to 12.04 after the update SSH (not SSHD) is now misbehaving when attempting to connect to other OpenSSH instances. I say OpenSSH as I am running a DropBear sshd on my router and I am able to connect to it. When attempting to connect… >>> More
SSH main process ended

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have a running ubuntu server 10.04.1. When I tried to login to the server via ssh, I could not. Instead, I got connection refused error. I tried to ping the machine and I got reply! So, the clear reason is that SSH daemon is stopped. After reboot, I was able to login to my server via ssh. After… >>> More
SSH server not working (respawns until stopped)

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have a running Ubuntu Server 10.04.1. When I tried to login to the server via ssh, I could not. Instead, I got connection refused error. I tried to ping the machine and I got reply! So, the clear reason is that SSH daemon is stopped. After reboot, I was able to login to my server via ssh. After… >>> More
Cannot SSH after resetting firewall on VPS

as seen on Server Fault - Search for 'Server Fault'
I'm having trouble trying to SSH to my Debian 5 VPS with blacknight. It was working fine until I did the following: Logged into 'Parallels Infrastructure Manager' - Container - Firewall - Set to 'Normal Firewall settings'. It told me there was an error with the IPTables and offered the option again… >>> More

Related posts about ssl

Plesk SSL Certificate (Default cert when SSL enabled, CORRECT cert when SSL is disabled)

as seen on Server Fault - Search for 'Server Fault'
I'm running Plesk 8.6.0: I have an SSL cert installed through Plesk's admin interface. But I have a bit of an issue: When I enabled SSL for the site, and selected my cert, then restart httpd, Plesk defaults to using my self-signed default certificate. Conversely, when I disable SSL support for the… >>> More
apache renew ssl not working [on hold]

as seen on Server Fault - Search for 'Server Fault'
Downloaded a new ssl cert from go daddy and installed the cert on apache2 server put the cert in /etc/ssl/certs/ folder put the gd_bundle.crt in the /etc/ssl/ folder private key is in /etc/ssl/private/private.key I just replaced the original files with the new files, did not replace the private… >>> More
Cant connect to mysql using self signed SSL certificate

as seen on Server Fault - Search for 'Server Fault'
After creating a self-signed SSL certificate, I have configured my remote mysqld to use them (and ssl is enabled) I ssh into my remote server, and try connecting to its own mysqld using ssl (mysql server is 5.5.25).. ~> mysql -u <user> -p --ssl=1 --ssl-cert=client.cert --ssl-key=client… >>> More
How to log invalid client SSL certificate in SSL

as seen on Server Fault - Search for 'Server Fault'
I have a IIS web site which requires client certificate. I have turned off CRL checking. The client is unable to access the web site - he gets 403.17 (certificate expired) error. I would like to log the certificate he is using, becaue I think he is using the wrong certificate. Is there a way to… >>> More
Mixing SSL and non-SSL content in an Apache2 virtual host

as seen on Server Fault - Search for 'Server Fault'
I have a (hopefully) common scenario for one of my sites that I just can't seem to figure out how to deploy correctly. I have the following site and directories for example.com: These need to require SSL: /var/www/example.com/admin /var/www/example.com/order These need to be non-SSL: /var/www/example… >>> More