Cisco Cisco Expressway Maintenance Manual
Local Outbound Ports
The Local outbound ports page (Maintenance > Tools > Port usage > Local outbound ports) shows the source IP
ports on the Expressway that are used to send outbound communications to other systems.
ports on the Expressway that are used to send outbound communications to other systems.
For each port listed on this page, if there is a firewall between the Expressway and the destination of the outbound
communications, your firewall must allow:
communications, your firewall must allow:
■
outbound traffic out from the IP port on the Expressway to the destination of the outbound communications,
and
and
■
return traffic from that destination back to the same Expressway IP port.
Remote Listening Ports
The Remote listening ports page (Maintenance > Tools > Port usage > Remote listening ports) shows the
destination IP addresses and IP ports of remote systems with which the Expressway communicates.
destination IP addresses and IP ports of remote systems with which the Expressway communicates.
Your firewall must be configured to allow traffic originating from the local Expressway to the remote devices identified
by the IP addresses and IP ports listed on this page.
by the IP addresses and IP ports listed on this page.
Note:
there are other remote devices not listed here to which the Expressway will be sending media and signaling, but
the ports on which these devices receive traffic from the Expressway is determined by the configuration of the
destination device, so they cannot be listed here. If you have opened all the ports listed in the
destination device, so they cannot be listed here. If you have opened all the ports listed in the
page, the Expressway will be able to communicate with all remote devices. You only need to use the information on
this page if you want to limit the IP ports opened on your firewall to these remote systems and ports.
this page if you want to limit the IP ports opened on your firewall to these remote systems and ports.
Network Utilities
This section provides information about how to use the network utility tools:
■
: allows you to check that a particular host system is contactable from the Expressway and that your
network is correctly configured to reach it.
■
: allows you to discover the details of the route taken by a network packet sent from the
Expressway to a particular destination host system.
■
: allows you to discover the path taken by a network packet sent from the Expressway to a particular
destination host system.
■
: allows you to check which domain name server (DNS server) is responding to a request for a
particular hostname.
Ping
The Ping tool (Maintenance > Tools > Network utilities > Ping) can be used to assist in troubleshooting system
issues.
issues.
It allows you to check that a particular host system is contactable and that your network is correctly configured to
reach it. It reports details of the time taken for a message to be sent from the Expressway to the destination host
system.
reach it. It reports details of the time taken for a message to be sent from the Expressway to the destination host
system.
To use this tool:
1.
In the Host field, enter the IP address or hostname of the host system you want to try to contact.
2.
Click Ping.
A new section will appear showing the results of the contact attempt. If successful, it will display the following
information:
information:
Host
The hostname and IP address returned by the host system that was queried.
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Cisco Expressway Administrator Guide