Cisco Cisco Web Security Appliance S170 사용자 가이드

Submit and commit your changes.

Use the smtprelay command to configure SMTP relay hosts.

For example:

You can configure the DNS settings for your appliance 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.

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. 

The number of seconds to wait before timing out a reverse DNS lookup.

Clearing the DNS cache.

AsyncOS for Web can use the Internet root DNS servers or your own DNS servers. 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. 

AsyncOS supports split DNS where internal servers are configured for specific domains and external or 
root DNS servers are configured for other domains. If you are using your own internal server, you can 
also specify exception domains and associated DNS servers.

example.com> smtprelay

No internal SMTP relay host configured.

Choose the operation you want to perform:

- 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”.