ZyXEL Communications GS2220 Series - SSH Overview

Chapter 47 Access Control
GS2220 Series User’s Guide
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47.7.2 SSH O ve rvie w
Unlike Telnet or FTP, which transmit data in clear text, SSH (Secure Shell) is a secure communication
protocol that combines authentication and data encryption to provide secure encrypted
communication between two hosts over an unsecured network.
Fig ure 317 SSH Communication Example
47.7.2.1 How SSH Wo rks
The following table summarizes how a secure connection is established between two remote hosts.
Table 223 SNMP Switch Traps
O PTIO N O BJEC T LABEL O BJEC T ID DESCRIPTIO N
stp STPNewRoot 1.3.6.1.2.1.17.0.1 This trap is sent when the STP root switch changes.
zyMrstpNewRoot 1.3.6.1.4.1.890.1.15.3.5
2.3.1
This trap is sent when the MRSTP root switch changes.
zyMstpNewRoot 1.3.6.1.4.1.890.1.15.3.5
3.3.1
This trap is sent when the MSTP root switch changes.
STPTopologyChange 1.3.6.1.2.1.17.0.2 This trap is sent when the STP topology changes.
zyMrstpTopologyChange 1.3.6.1.4.1.890.1.15.3.5
2.3.2
This trap is sent when the MRSTP topology changes.
zyMstpTopologyChange 1.3.6.1.4.1.890.1.15.3.5
3.3.2
This trap is sent when the MSTP root switch changes.
mactable zyMacForwardingTableFull 1.3.6.1.4.1.890.1.15.3.4
8.2.1
This trap is sent when more than 99% of the MAC table is
used.
zyMacForwardingTableFullReco
vered
1.3.6.1.4.1.890.1.15.3.4
8.2.2
This trap is sent when the MAC address switching table
has become normal from full.
rmon RmonRisingAlarm 1.3.6.1.2.1.16.0.1 This trap is sent when a variable goes over the RMON
"rising" threshold.
RmonFallingAlarm 1.3.6.1.2.1.16.0.2 This trap is sent when the variable falls below the RMON
"falling" threshold.
classifier zyAclV2ClassifierLogNotification 1.3.6.1.4.1.890.1.15.3.1
05.4.1
This trap is sent when the Switch detects classifier log
information.
rip zyRipExceedMaxDynamicRoute 1.3.6.1.4.1.890.1.15.3.7
4.2.1
This trap is sent when the maximum allowed number of
dynamic routes learned through RIP has been
exceeded.
ospf zyOspfExceedMaxDynamicRout
ePath
1.3.6.1.4.1.890.1.15.3.5
7.3.1
This trap is sent when the maximum allowed number of
dynamic routes learned through OSPF has been
exceeded.