2.12.12. TYPE SNMP - Changing the Community Strings for Read
Access 
The HG 3575 board operates an SNMP agent that can be address over
LAN.
HG 3575’s SNMP agent exclusively supports read-only access.
Access authorization and access rights are controlled by the SNMP
agent over community strings.
A MIB browser that sends queries to the SNMP agent, identifies itself
as belonging to a community. The community is identified by a community
string. This is a simple, unencrypted text.
The standard setting - and default for community string 1 (CS1) -
is “public“, CS2 is not used.
These values can be modified. CS2 can be used to assign read-only
access to a second community on the SNMP agent.
If, for example, CS1=“ToP_SeCrEt23“ is set and CS2=“11!$ZwY?“,
access attempts using all other community strings (including “public“)
are rejected.
For the parameters CS1 and CS2, all ASCII characters between «!»
(exclamation mark, 33 Dec) and «~» (tilde, 126 Dec) are used with the
exception of the characters «”» (34 Dec), «/» (47 Dec), «\» (92
Dec), and «^» (94 Dec). The space character « » (32 Dec) may not
be used.
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Configuration Management > System Data
> IPDA > IPDA Access Point
Click Search and select
the access point.
Enter on the Security tab under SNMP
and Save.
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CHANGE-STMIB:MTYPE=NCUI2,LTU=99,TYPE=SNMP,
CS1=“ToP_SeCrEt23“,CS2=“11!$ZwY?“; |
This change does not become effective until the access point is restarted.
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Configuration Management > System Data
> IPDA > IPDA System Data
Click Search and select
the access point. Click Execute on the Action pull-down
menu and select the mode of action Update AP, confirm with OK.
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DEACTIVATE-USSU:LTG=1,LTU=99;ACTIVATE-USSU:UNIT=LTG,LTG=1,LTU=99; |
IMPORTANT:
Connections are cleared down without further
warning.
CS1 cannot be deleted. The following procedure is recommended for
deleting CS2:
- Reset all parameters in the SNMP AMO branch to the default value (CS1=“public“, CS2 inactive)
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Initialization can only be initiated in expert
mode.
Expert Mode > OpenScape 4000 > Expert Access >
Open ...<IP> with AMO (see AMO command)
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CHANGE-STMIB:MTYPE=INITNCU2,LTU=99,TYPE=SNMP; |
- Restore the required values for CS1
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Configuration Management > System Data
> IPDA > IPDA Access Point
Click Search and select
the access point.
Enter on the Security tab under SNMP
and Save.
|
|
|
CHANGE-STMIB:MTYPE=NCUI2,LTU=99,TYPE=SNMP,
CS1=“ToP_SeCrEt23“; |
- This change does not become effective until the access point is restarted.
|
|
Configuration Management > System Data
> IPDA > IPDA System Data
Click Search and select
the access point. Click Execute on the Action pull-down
menu and select the mode of action Update AP, confirm with OK.
|
|
|
DEACTIVATE-USSU:LTG=1,LTU=99;ACTIVATE-USSU:UNIT=LTG,LTG=1,LTU=99; |
IMPORTANT:
Connections are cleared down without further
warning.