Ssh Terminal Services - 3Com Switch 7700 Configuration Manual

SSH Terminal Services

segments, SW77001 cannot receive the multicast packets from SW77003, while
SW77004 is synchronized by SW77003 after receiving the multicast packet.
Configuring Authentication-Enabled NTP Server Mode
SW77001 sets the local clock as the NTP master clock at stratum 2. SW77002 sets
SW77001 as its time server in server mode and itself in client mode and enables
authentication. See Figure 1-2.
Configure Ethernet Switch SW77001:
1 Enter system view.
<SW77001> system-view
2 Set the local clock as the master NTP clock at stratum 2.
[SW77001] ntp-service refclcok-master 2
Configure Ethernet Switch SW77002:
1 Enter system view.
<SW77002> system-view
2 Set SW77001 as time server.
[SW77002] ntp-service unicast-server 1.0.1.11
3 Enable authentication.
[SW77002] ntp-service authentication enable
4 Set the key.
[SW77002] ntp-service authentication-keyid 42 authentication-mode
md5 aNiceKey
5 Set the key as reliable.
[SW77002] ntp-service reliable authentication-keyid 42
The above examples synchronized SW77002 by SW77001. Since SW77001 has
not been enabled authentication, it cannot synchronize SW77002.
Perform the following additional configurations on SW77001:
1 Enable authentication.
[SW77001] ntp-service authentication enable
2 Set the key.
[SW77001] ntp-service authentication-keyid 42 authentication-mode
md5 aNiceKey
3 Configure the key as reliable.
[SW77001] ntp-service reliable authentication-keyid 42
Secure Shell (SSH) can provide information security and powerful authentication to
prevent such assaults as IP address spoofing or plain-text password interception
when users log on to the switch remotely from an insecure network environment.
A switch can connect to multiple SSH clients. The SSH client enables SSH
connections between users and the Ethernet switch or UNIX host that supports
the SSH Server. You can set up SSH channels for local connection. See Figure 9.
SSH Terminal Services 371