AudioCodes Mediant 4000 SBC User Manual page 409

CHAPTER 18 Core Entities
Parameter
'DNS Resolve Method'
dns-resolve-
method
[ProxySet_
DNSResolveMethod]
Proxy Address Table
'Index'
proxy-ip-index
[ProxyIp_ProxyIpIndex]
✔
Incoming SIP request from 10.10.10.10:5080;TLS: Best
match is #2, #3 and #4 (same priority).
✔
Incoming SIP request from 10.10.10.10:5070;TCP: Best
match is #4 (due to transport type); second best match is
#2 and #3 (same priority).
Defines the DNS query record type for resolving the proxy server's
host name (FQDN) into an IP address(es).
■ [-1] = Not configured. DNS resolution method is according to
the settings of the global parameter, ProxyDNSQueryType.
■ [0] A-Record = (Default) DNS A-record query is used to
resolve DNS to IP addresses.
■ [1] SRV = If the proxy address is configured with a domain
name without a port (e.g., domain.com), an SRV query is done.
The SRV query returns the host names (and their weights). The
device then performs DNS A-record queries per host name
(according to the received weights). If the configured proxy
address contains a domain name with a port (e.g.,
domain.com:5080), the device performs a regular DNS A-
record query.
■ [2] NAPTR = NAPTR query is done. If successful, an SRV
query is sent according to the information received in the
NAPTR response. If the NAPTR query fails, an SRV query is
done according to the configured transport type. If the
configured proxy address contains a domain name with a port
(e.g., domain.com:5080), the device performs a regular DNS A-
record query. If the transport type is configured for the proxy
address, a NAPTR query is not performed.
■ [3] Microsoft Skype for Business = An SRV query is done as
required by Microsoft when the device is deployed in a
Microsoft Skype for Business environment. The device sends a
special SRV query to the DNS server according to the transport
protocol configured in the 'Transport Type' parameter
(described later in this section):
✔
TLS:
✔
TCP: "_sipinternal._tcp.<domain>" and "_sip_
tcp.<domain>".
✔
Undefined: "_sipinternaltls_tcp.<domain>", "_sipinternal_
tcp.<domain>", "_sip_tls.<domain>" and "_sip_
tcp.<domain>".
The SRV query returns the host names (and their weights). The
device then performs DNS A-record queries per host name
(according to the received weights) to resolve into IP
addresses.
Defines an index number for the new table row.
Note: Each row must be configured with a unique index.
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Mediant 4000 SBC | User's Manual
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