Adding a Second IP Address to an Existing Network Adapter on Solaris

If you run EZproxy on a Solaris system that already has a web server and you want to use EZproxy on port 80, you will need to assign an additional DNS name and IP address to the server.

Start by requesting the new DNS name and IP address from your network administrator. The IP address you request must be in the same subnet as the existing IP address on your server.

If you use proxy by hostname, be sure to request the creation of the wildcard entry to point to the same address. With proxy by hostname, you should also verify that the DNS entries with the Check DNS test.

In this note, the DNS name ezproxy.yourlib.org and the IP address 68.14.229.198 demonstrate where the DNS name and IP address should appear, and where you should insert your values instead.

These are the steps to add the second IP address to your existing network adapter.

  1. Become root on your system, either by logging into that account or using the su command.
  2. Change your current directory to the /etc directory with the command:
    cd /etc
  3. Check for existing network adapters with the command:
    ls hostname.*
    In most instances, you will see either hostname.hme0, hostname.le0, or hostname.eri0. If you see other files with any other names and are unfamiliar with configuring TCP/IP, you may want to consult with your system administrator before proceeding or contact support@oclc.org.
  4. Edit /etc/hosts and add a line for your new address and name such as:
    68.14.229.198 ezproxy.yourlib.org
  5. To create the new interface, you need to create a file that matches the name found in step 3 with :1 added to the end, such as /etc/hostname.hme0:1 or /etc/hostname.le0:1. This new file should contain only the new DNS name, such as:
    ezproxy.yourlib.org

With these changes in place, your system is now configured to create this added IP address each time it boots. You can either reboot to make this change take effect, or manually enable the new address with a series of command similar to:

ifconfig hme0:1 plumb
ifconfig hme0:1 68.14.229.198

ifconfig hme0:1 up

To tell EZproxy to use this name and address, edit config.txt/ezproxy.cfg and add lines similar to:

Name ezproxy.yourlib.org
Interface 68.14.229.198

These lines should appear before any LoginPort, LoginPortSSL, or Title lines.

You will also need to configure your existing web server to tell it to use only its IP address. In Apache, you do this by editing httpd.conf and changing your Listen lines like:

Listen 80

to

Listen 68.14.229.197 :80

where 68.14.229.197 would be replaced by the main IP address of your server.