5-3
Cisco Global Site Selector Administration Guide
OL-10410-01
Chapter 5 Configuring Access Lists and Filtering GSS Traffic
Filtering GSS Traffic Using Access Lists
Table 5-1
GSS-Related Ports and Protocols for Inbound Traffic
Source Port
(Remote
Device)
Destination
Port
(GSS)
Protocol
Details
*
20–23
TCP
FTP, SSH, and Telnet server
services on the GSS
20–23
*
TCP
Return traffic of FTP, Secure Copy
(SCP), and Telnet GSS CLI
commands
49 or user
configured
*
TCP
Return traffic for
*
53
UDP, TCP GSS DNS server traffic
53
*
UDP
Return traffic of GSS software
reverse lookup, “dnslookup”
queries, and name server
forwarding
123
123
UDP
Network Time Protocol (NTP)
updates
*
161
UDP
Simple Network Management
Protocol (SNMP) traffic
*
443
TCP
Primary GSSM GUI
1304
1304
UDP
CRA keepalives
1974
1974
UDP
Director Response Protocol (DRP)
protocol traffic
*
2000
UDP
Inter-GSS periodic status reporting
*
2001–2005
TCP
Inter-GSS communication
2001–2005
*
TCP
Return traffic of inter-GSS
communication
*
3002–3008
TCP
Inter-GSS communication
3002–3008
*
TCP
Return traffic of inter-GSS
communication