5. Monitoring through Proxy Servers

5. Monitoring through Proxy Servers
Prev	Chapter 49. Web-based Synthetic Transactions	Next

5. Monitoring through Proxy Servers

ZenWebTx can access Web servers through HTTP proxy servers and non-authenticating HTTPS proxy servers.

To configure ZenWebTx to use a proxy, you must define the http_proxy and https_proxy environment variables.

Open the ~zenoss/.bashrc file.
Add the following lines:
```
export http_proxy=http://Address:Port/
export https_proxy=http://Address:Port/
```
where Address is the address of your HTTP or HTTPS proxy server, and Port is the port on which your proxy server listens.

5.1. Example Proxy Setup

HTTP and HTTPS proxies frequently listen on port 3128. If your proxy server is "my.proxyserver.loc" and it uses port 3128, then add these two lines to the ~zenoss/.bashrc file:

export http_proxy=http://my.proxyserver.loc:3128/
export https_proxy=http://my.proxyserver.loc:3128/

5.2. Testing the Proxy Setup

You can test the proxy setup by using the twill-sh tool. twill-sh is an interpreter shell for the twill scripting language, which is used to define WebTx data sources.

After setting up the proxy information in the ~zenoss/.bashrc file, follow these steps to test your setup:

Make sure http_proxy and https_proxy are defined in your current shell:
```
$ source ~zenoss/.bashrc
```

Launch the twill shell:

PYTHONPATH=$PYTHONPATH:\
$ZENHOME/ZenPacks/ZenPacks.zenoss.ZenWebTx/ZenPacks/zenoss/ZenWebTx/lib:\
$ZENHOME/ZenPacks/ZenPacks.zenoss.ZenWebTx/ZenPacks/zenoss/ZenWebTx/bin/twill-sh

Try to retrieve a URL through HTTP or HTTPS. For example, to retrieve the Zenoss home page, enter:
```
go http://www.zenoss.com
```
You should see a message similar to this:
```
current page: http://www.zenoss.com
```
If an error message appears, then your proxy may not be correctly configured in the ~zenoss/.bashrc file.
Exit the twill shell:
```
exit
```

Prev	Up	Next
4. Creating twill Commands	Home	6. Daemons

Extended Monitoring Guide