Destination port
Source port
Use
Protocol
UDP or TCP
(TLS over TCP).
Responses to SIP
messages initiated by the
phone should be sent to
the number used in the
Source Port field of the
message from the phone.
The number used in the
Source Port field of the
DNS query that the
phone sends
Any
Received DNS
messages
UDP
The number used in the
Source Port field of the
SNTP query that the
phone sends
Any
Received SNTP
messages
UDP
161
Any
Received SNMP
messages
UDP
Transmitted packets (source = SIP phone)
Destination port
Source port
Use
Protocol
UDP or TCP
53
Any unused port number
Transmitted DNS
messages
UDP
67
68
Transmitted DHCP
messages
UDP
80, unless explicitly
specified otherwise
Any unused port number
Packets transmitted by
the HTTP client of the
phone
TCP
123
Any unused port number
Transmitted SNTP
messages
UDP
The number used in the
Source Port field of the
SNMP query packet
received by the phone
161
Transmitted SNMP
messages
UDP
443, unless explicitly
specified otherwise
Any unused port number
TLS/SSL packets
transmitted by the HTTP
client of the phone.
TCP
514
Any unused port number
Transmitted Syslog
messages
UDP
Table continues…
TCP and UDP ports
September 2017
Installing and Administering Avaya J129 IP Phone
45