3Com V6100, User Manual Manual, Page: 348 / 496

348
V6100 and V7122 User Guide
Explanation of the example access list:
This access list consists of three rules:
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Rule #10: traffic from the subnet 10.xxx.yyy.zzz is allowed if the traffic rate does not
exceed 40 KB/s.
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Rule #15: if a packet didn't match rule #10, that is, the excess traffic is over 40 KB/s, and
coming from the subnet 10.31.4.xxx to ports 4000 to 9000, then it is allowed.
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Rule #20: all other traffic (which didn't match the previous rules), is blocked.
The internal firewall can also be configured via the Embedded Web Server (see Configuring
the Firewall Settings ).
Network Port Usage
The following table lists the default TCP/UDP network port numbers used by the V7122.
Where relevant, the table lists the
ini file parameters that control the port usage and provide
source IP address filtering capabilities.
Table 78 Default TCP/UDP Network Port Numbers
Port Number Peer Port Application Notes
2 2 Debugging interface Always ignored
23 - Telnet
Disabled by default (TelnetServerEnable).
Configurable (TelnetServerPort), access
controlled by WebAccessList
68 67 DHCP Active only if DHCPEnable = 1
80 - Web server (HTTP)
Configurable (HTTPPort), can be disabled
(DisableWebTask or HTTPSOnly). Access
controlled by WebAccessList
161 - SNMP GET/SET
Configurable (SNMPPort), can be disabled
(DisableSNMP). Access controlled by
SNMPTrustedMGR
443 - Web server (HTTPS)
Configurable (HTTPSPort), can be disabled
(DisableWebTask). Access controlled by
WebAccessList
500 - IPSec IKE
Can be disabled (EnableIPSec)
Not supported in the current version.
6000, 6010
and up
- RTP traffic
Base port number configurable (BaseUDPPort),
fixed increments of 10. The number of ports
used depends on the channel capacity of the
device.
6001, 6011
and up
- RTCP traffic Always adjacent to the RTP port number