Re: How to preserve SNMP trap IP address and host name when forwarding

If this is specific to only 10 servers, you could configure NAT on snmp proxy for these 10 servers to do address spoofing?

Sent from my iPad

On 10-Apr-2019, at 8:59 PM, 700 grm <[email protected]> wrote:

Hi, 

I need help, with preserving SNMP trap IP address and hostname when forwarding SNMP traps through snmptrapd

I got 10 servers behind a firewall and router, I have setup SNMP trap forwarding and GET based on community string however, snmptrapd rewrites trap headers, IPs and host name with SNMP Proxy server information
<image.png>
snmptrapd.conf  only configuration that was added
/etc/snmp/snmptrapd.conf
      authCommunity   net public
      forward  default  10.12.4.192 public
     

I was expecting to get trap with SRV1 information:

2019-04-10 08:52:46 SRV1.localhost  [UDP: [192.168.0.20:36670->[X.X.X.X]:162]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (14866232) 1 day, 17:17:42.32  SNMPv2-MIB::snmpTrapOID.0 = OID: SNMPv2-MIB::sysName   SNMPv2-MIB::sysName.0 = STRING: test trap from xxx

However, I am getting:

2019-04-10 08:52:46 snmp-proxy.localhost  [UDP: [192.168.0.10:36670->[X.X.X.X]:162]:
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (14866232) 1 day, 17:17:42.32  SNMPv2-MIB::snmpTrapOID.0 = OID: SNMPv2-MIB::sysName   SNMPv2-MIB::sysName.0 = STRING: test trap from xxx

I will appreciate any help

Thx and regards

700grm
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