Setting
Description
Enable SIP Keep-Alive Messages
Specifies whether to regularly transmit keep-alive
messages on the SIP signaling channel and on RTP
sessions part of SIP calls. Keep-alive messages
maintain connections through firewall/NAT devices that
are often used at network edges.
If your system is in an Avaya SIP environment, it’s
recommended that you disable this setting to enable
calls to fully connect.
6.
Select
Save
.
Web Proxies
A web proxy can help your system communicate outside your network securely and with increased
performance. For example, you can direct your system’s outbound requests through an enterprise proxy.
You can configure your system to use a proxy one of the following ways:
▪
Automatic
: You specify only the proxy credentials (if needed). Using DHCP, your system obtains a
URL to automatically download a proxy auto-configuration (PAC) file.
▪
Semi-automatic
: You specify the proxy credentials and URL for automatically downloading a PAC
file.
▪
Manual
: You specify the proxy address, port, and credentials. (This method lets you configure your
system with only one proxy.)
If your configuration includes automatically downloading a PAC file, there must be an expiration
associated with the file so the system knows when to download a new one. Make sure your PAC file
server includes an
Expires
header in its HTTP response (for example,
Expires: Wed, 30 Oct
2016 09:30:00 GMT
).
Your system can authenticate with a proxy using the following methods:
▪ Digest authentication (with either MD-5 or SHA-256 digest)
▪ NTLM authentication (only NTLMv2 is supported)
▪ Basic authentication (this insecure method is disabled by default)
▪ No authentication (or null authentication, meaning the proxy server doesn’t require credentials)
Your system supports the following services when configured to use a web proxy:
▪ Provisioning service
▪ Software updates
Related Links
Checking the Web Proxy Configuration
on page 99
Enable the System to Use a Web Proxy
By default, your system configuration doesn’t use web proxies.
Procedure
1.
In the system web interface, go to
Network
>
Primary Network
>
Web Proxy Settings
.
Securing the System
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