Tahoe 4681, User Manual

Page: 28 / 52

20
Tahoe 4681 (4-port G.shdsl.bis/FastEthernet modem card)
respectively. Moreover the access may be limited to a certain IP address:
Tahoe> telnet host < IP address >
If the IP address is set as 0.0.0.0, then the access is possible from anywhere in the network.
If you disable telnet access while connected through telnet connection you will loose possibility to
manage the modem remotely and you won’t be able to enable telnet access again without a reboot or
local management through serial console.
tcpdump
The tcpdump command is used to monitor the network traffic on a specified interface. When no
interface is specified eth0 is used by default:
Tahoe> tcpdump wan0
05:51:27.453 > cisco hdlc (56)
IP 192.168.20.101 -> 192.168.14.67
ICMP echo request seq 2
05:51:27.541 < cisco hdlc (62)
IP 192.168.14.67 -> 192.168.20.101
ICMP echo reply seq 2
To stop monitoring traffic press Ctrl+C.
tftp
The command allows limiting the TFTP access used for the firmware upgrade. The access may
be enabled or disabled by entering:
tftp on
or
tftp off
respectively. Moreover the access may be limited to a certain IP address:
Tahoe> tftp host < IP address >
If the IP address is set as 0.0.0.0, then the access is possible from anywhere in the network.