subject:"Sending traps"

Fwd: sending traps and perl plugin

2019-10-10 Thread Александр Малюков

Good day!

I use snmpd with perl plugin. Plugin code - http://paste.debian.net/1105734
snmpd config - http://paste.debian.net/1105733

snmpwalk works fine.

But i try to add monitor (sending traps) feature.
and add monitor section:

monitor -S -I -r 20 toHot 1.3.6.1.4.1.9.2.1.1 > 15

In tcpdump i see json response every 20 seconds. Value of OID
1.3.6.1.4.1.9.2.1.1 is still 20.
But snmpd not send traps. I not see traps traffic in tcpdump and traps
in snmptrapd.

Whats wrong in my setup?
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Re: How to specify the source address for sending traps

2019-07-26 Thread Bart Van Assche


  
  
On 7/26/19 1:06 PM, David Moriconi
  (dmoricon) via Net-snmp-users wrote:


  
  
  
  
  
Hi,
I am using
Net-SNMP 5.8 on CentOS 7 with AgentX enabled. My AgentX
subagent is implemented using SNMP4J-AgentX.

 
I want to
tell Net-SNMP on which interface to send traps. I look at
the SNMPD configuration manpage (http://www.net-snmp.org/docs/man/snmpd.conf.html)
and don’t see anything like it. The trap2sink directive only
takes the target host as argument along with a community and
port. From what I can see, trapsess also only takes the
target address and not the source address.

 
Can someone
please let me know if this is possible? If so, how can I
achieve it?
 
Thank you
  

Hi David,

Please have a look at commit e56699f5e2ef ("Add the ability to
  set the source address with "-s" for trapsess").
Bart.

  


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How to specify the source address for sending traps

2019-07-26 Thread David Moriconi (dmoricon) via Net-snmp-users

Hi,
I am using Net-SNMP 5.8 on CentOS 7 with AgentX enabled. My AgentX subagent is
implemented using SNMP4J-AgentX.

I want to tell Net-SNMP on which interface to send traps. I look at the SNMPD
configuration manpage (http://www.net-snmp.org/docs/man/snmpd.conf.html) and
don’t see anything like it. The trap2sink directive only takes the target host
as argument along with a community and port. From what I can see, trapsess also
only takes the target address and not the source address.

Can someone please let me know if this is possible? If so, how can I achieve it?

Thank you

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Problem sending traps

2019-02-11 Thread Mostafa Kassem

Greetings,
Our trap sink parameters are modified per 2 MIB entries, one for the IP address 
and one for the port.

We would like to set the trap sink programmatically on powerup and when we 
receive an snmp request.
On powerup and every time we receive a request to change the trap sink IP 
address or port, we parse the snmpd.conf file to get the username, 
authentication and privacy protocols and passwords.  Our snmpd.conf file looks 
like this:

# setup authorization
CreateUser myUserName SHA "myAuthenticationPassword" AES " myPrivacyPassword "
rwuser myUserName authPriv

# include Agentx setup
master agentx
authtrapenable  1

And our code to set the trap session on power up, is written in C++ and is as 
follows:

bool TrapSession::createSnmpV3TrapSession()
{
std::stringstream connectingString;
netsnmp_session session, *sesp;
memset(, 0, sizeof(netsnmp_session));
snmp_sess_init ();   // Set up defaults

 session.version = SNMP_VERSION_3;

// Peer name
std::stringstream connectionString;
connectionString << "udp6:[" << ipV6AddressAsString << "]:" << sinkPort;
session.peername = strdup(connectionString.str().c_str());

// set the SNMPV3 user name
session.securityName = strdup( userName.c_str());
session.securityNameLen = strlen(userName.c_str());

// Security
session.securityLevel = SNMP_SEC_LEVEL_AUTHPRIV;
session.securityModel = SNMP_SEC_MODEL_USM;

// Authentication Protocol
session.securityAuthKeyLen = USM_AUTH_KU_LEN;
session.securityAuthProto = snmp_duplicate_objid(usmHMACSHA1AuthProtocol, 
USM_AUTH_PROTO_SHA_LEN);
session.securityAuthProtoLen = USM_AUTH_PROTO_SHA_LEN;

if (generate_Ku(session.securityAuthProto,
  session.securityAuthProtoLen,
  (const uint8_t *) authenticationPassword.c_str(),
  authenticationPassword.length(),
  session.securityAuthKey,
  ) != SNMPERR_SUCCESS)
{
LOG_ERROR("Error generating authentication KU for authentication 
password: " << authenticationPassword);
return false;
}

// Privacy Protocol
session.securityPrivKeyLen = USM_PRIV_KU_LEN;
session.securityPrivProto = snmp_duplicate_objid(usmAESPrivProtocol, 
USM_PRIV_PROTO_AES_LEN);
session.securityPrivProtoLen = USM_PRIV_PROTO_AES_LEN;

if (generate_Ku(session.securityAuthProto,
  session.securityAuthProtoLen,
  (const uint8_t *)privacyPassword.c_str(), 
privacyPassword.length(),
  session.securityPrivKey,
  ) != SNMPERR_SUCCESS)
{
LOG_ERROR("Error generating privacy KU for privacy password: " << 
privacyPassword);
return false;
}

// open the session
sesp = snmp_open();
if (!sesp) {
LOG_ERROR("Unable to open a trap session to: " << session.peername << " 
with user: " << userName);
throw std::runtime_error("Unable to open SNMP session!");
return false;
}

add_trap_session(sesp, SNMP_MSG_TRAP2, FALSE, SNMP_VERSION_3);
return true;
}

However, we are getting this error: [SNMP 3] : snmpd: send_trap: USM unknown 
security name (no such user exists)

What are we doing wrong?

If we add this line to the snmpd.conf and not use the above-mentioned code, we 
have no problem sending traps.

trapsess -v 3 -u myUserName -l authPriv -a SHA -A " myAuthenticationPassword " 
-x AES -X " myPrivacyPassword " udp6:[2001:bb::f8]:162

Thanks,

Mostafa
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How to configure sending traps

2015-04-20 Thread James McGuire

Hi there,

I've been trying to configure net-snmp to send a trap when the disk utilisation 
on any mount point reaches a certain threshold, say 80% of total capacity.

I've read the documentation here:

https://access.redhat.com/documentation ... 
eving.htmlhttps://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/sect-System_Monitoring_Tools-Net-SNMP-Retrieving.html

but when I attempt to review the available parameters in 
HOST-RESOURCES-MIB::hrStorage by issuing the following command, I get an error 
suggesting the table is not recognised:

 snmptable -Cb localhost HOST-RESOURCES-MIB::hrStorage
Was that a table? HOST-RESOURCES-MIB::hrStorage

Can anyone advise how I go about doing this with a 'monitor' statement inside 
of /etc/snmp/snmpd.conf? I also read the wiki here:

http://www.net-snmp.org/wiki/index.php/ ... 
Monitoringhttp://www.net-snmp.org/wiki/index.php/TUT:DisMan_Monitoring

But although there is a subsection on disk montioring, there is no related 
content to explain how to do this!

Eventually I need to get traps working for:


· memory utilisation (send trap when memory utilisation  80%)

· cpu load averages (send trap when 5 minute load average is = 100%)

· process not running (send trap when httpd is no longer running).

· Disk utilisation (send trap when any mount point is utilised  80%)

Would appreciate some advice on how to do this as information online appears to 
be surprisingly scant and I'd expect this would be a very common requirement?

Many thanks,

James


Versions:

CentOS Linux release 7.1.1503 (Core)

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Installed Packages
net-snmp.x86_64 1:5.7.2-20.el7 @0-base
net-snmp-agent-libs.x86_64 1:5.7.2-20.el7 @0-base
net-snmp-libs.x86_64 1:5.7.2-20.el7 @0-base
net-snmp-utils.x86_64 1:5.7.2-20.el7 @0-base
Available Packages
net-snmp-agent-libs.i686 1:5.7.2-20.el7 0-base
net-snmp-devel.i686 1:5.7.2-20.el7 0-base
net-snmp-devel.x86_64 1:5.7.2-20.el7 0-base
net-snmp-gui.x86_64 1:5.7.2-20.el7 0-base
net-snmp-libs.i686 1:5.7.2-20.el7 0-base
net-snmp-perl.x86_64 1:5.7.2-20.el7 0-base
net-snmp-python.x86_64 1:5.7.2-20.el7 0-base
net-snmp-sysvinit.x86_64 1:5.7.2-20.el7 0-base

James McGuire
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Sending traps from subagent results either in deadlock(tcp recvQ issue) or SIGPIPE

2013-05-07 Thread Usha Kodali

I am running net-snmp 5.4.2.1
Have a subagent sending traps to the master snmpd daemon.

After about (depending on the size of trap buffer) 200 or 500 traps,
either the subagent and snmpd deadlock in sendto or
subagent receives a SIGPIPE.

Observations:

1.   The core problem is that snmpd agent doesn't seem to drain it's recvQ 
(using tcp:localhost:705)

2.   If the subagent is implemented as a library call, there is no way to 
clean up the session and reinit.

The following sequence doesn't seem to work

init_agent

init_snmp(daemon_name);

..

// Lets say inorder to avoid the deadlock, I will close the session(subagent) 
after sending x traps and reinit

snmp_shutdown(daemon_name);

shutdown_agent();



// Reinit

Init_agent

Init_snmp


I have read through all the forum posts, but didn't find any solution.
I did read that 5.7.2 does resolve the SIGPIPE, unfortunately I cannot risk 
snmp hijacking SIGPIPE since the daemon sending the traps needs to handle this 
signal for other reasons. Besides that, I have also read that 5.7.2 doesn't 
solve the deadlock (main cause the recvQ on the snmpd socket doesn't get 
drained)
Appreciate any help or insights into this.

Thanks,
-Usha




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