AudioCodes Mediant 1000B SBA - Page 259

Installation & Maintenance Manual A. SBA Security Default Template
Version 6.8 259 Microsoft Lync Server
Firewall Rule Description
Protocol
Keyword
Direction
Program/
Service
Local Ports
Remote
Ports
Allow inbound
connections for
service: RtcSrv for
protocol: TCP
_ TCP Inbound RtcSrv _ _
Core Networking -
Dynamic Host
Configuration
Protocol (DHCP-In)
Allows DHCP
(Dynamic
Host
Configuration
Protocol)
messages for
stateful auto-
configuration.
UDP Inbound dhcp 68 67
Core Networking -
Dynamic Host
Configuration
Protocol (DHCP-
Out)
Allows DHCP
(Dynamic
Host
Configuration
Protocol)
messages for
stateful auto-
configuration
UDP Outboun
d
dhcp 68 67
Core Networking -
DNS (UDP-Out)
Outbound
rule to allow
DNS
requests.
DNS
responses
based on
requests that
matched this
rule will be
permitted
regardless of
source
address. This
behavior is
classified as
loose source
mapping.
[LSM] [UDP
53]
UDP Outboun
d
dnscache _ 53