Cisco Cisco Web Security Appliance S170 Guía Del Usuario
Chapter 25 Configuring Network Settings
Configuring DNS Server(s)
25-28
Cisco IronPort AsyncOS 7.0 for Web User Guide
OL-23079-01
Configuring DNS Server(s)
You can configure the DNS settings for your IronPort appliance using the
Network > DNS page or using the
Network > DNS page or using the
dnsconfig
command. Before you configure
DNS, consider the following:
•
Whether to use the Internet’s DNS servers or your own, and which specific
server(s) to use.
server(s) to use.
•
Which routing table to use for DNS traffic.
You must use the routing table associated with the interface that faces the
DNS server, either Data or Management.
DNS server, either Data or Management.
•
The number of seconds to wait before timing out a reverse DNS lookup.
•
Clearing the DNS cache.
Specifying DNS Servers
IronPort AsyncOS can use the Internet root DNS servers, your own DNS servers,
or the Internet root DNS servers and authoritative DNS servers that you specify.
When using the Internet root servers, you can 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.
or the Internet root DNS servers and authoritative DNS servers that you specify.
When using the Internet root servers, you can 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.
- NEW - Add a new host.
[]> new
Please enter the hostname of your relay host. You may put a colon
after the hostname to indicate a port to use other than 25, such as
“smtp.example.com:547”.