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

Hi   I got exactly the same problem and wrote a patch. You will need to recompile net-snmp from sources though.  Patches and instructions here -  sourceforge.net sourceforge.net  They are for net-snmp-5.7.3, I didn't have a chance to test them on 5.8 yet.   Pik Master   
            
          
     
      
       
        Dnia 10 kwietnia 2019 17:30 Kaleemulla Sharief \(kasharie\) via Net-snmp-users <[email protected] napisał(a):
       
    
       
         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] 
 DISMAN-EVENT-MIB::sysUpTimeIns = 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] 
 DISMAN-EVENT-MIB::sysUpTimeIns = 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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