Cisco Cisco Email Security Appliance X1070 User Guide
33-50
User Guide for AsyncOS 9.7 for Cisco Email Security Appliances
Chapter 33 System Administration
Changing Network Settings
Changing Network Settings
This section describes the features used to configure the network operation of the appliance. These
features give you direct access to the hostname, DNS, and routing settings that you configured via the
System Setup Wizard (or the
features give you direct access to the hostname, DNS, and routing settings that you configured via the
System Setup Wizard (or the
systemsetup
command) in
The following features are described:
•
sethostname
•
DNS Configuration (GUI and via the
dnsconfig
command)
•
Routing Configuration (GUI and via the
routeconfig
and
setgateway
commands
)
•
dnsflush
•
Password
•
Network Access
•
Login Banner
Changing the System Hostname
The hostname is used to identify the system. You must enter a fully-qualified hostname. To change the
hostname:
hostname:
–
On the web interface, click Network> IP Interfaces, click the Management and in the
Hostname, change the hostname.
Hostname, change the hostname.
–
On the CLI, use the s
ethostname
command.
Note
The new hostname does not take effect until you commit changes.
Configuring Domain Name System (DNS) Settings
You can configure the DNS settings for your appliance through the DNS page on the Network menu of
the GUI, or via the d
the GUI, or via the d
nsconfig
command.
You can configure the following settings:
•
whether to use the Internet’s DNS servers or your own, and which specific server(s) to use
•
which interface to use for DNS traffic
•
the number of seconds to wait before timing out a reverse DNS lookup
•
clear DNS cache
Specifying DNS Servers
AsyncOS can use the Internet root DNS servers, your own DNS servers, or the Internet root DNS servers
and authoritative DNS servers you specify. When using the Internet root servers, you may specify
alternate servers to use for specific domains. Since an alternate DNS server applies to a single domain,
it must be authoritative (provide definitive DNS records) for that domain.
and authoritative DNS servers you specify. When using the Internet root servers, you may specify
alternate servers to use for specific domains. Since an alternate DNS server applies to a single domain,
it must be authoritative (provide definitive DNS records) for that domain.