Bug with SNMP Zabbix 2.0.2 and source IP

[Alex_SYB]

Hi

when i set source IP, zabbix is unable to start any SNMP sessions

I believe this is the section


#ifdef HAVE_SNMP_SESSION_LOCALNAME
if (NULL != CONFIG_SOURCE_IP)
session.localname = CONFIG_SOURCE_IP;
#endif

SOCK_STARTUP;

if (NULL == (ss = snmp_open(&session)))
{
SOCK_CLEANUP;

zbx_snprintf(err, MAX_STRING_LEN, "Cannot open snmp session");
}


in zabbix/src/zabbix_server/poller/checks_snmp.c

everything works well when i don't set the source address.

reason i need source address is zabbix was on another machine and is now merged into a new machine.

all the firewall rules and agent configs have been set to the old address !

[edgecase]

Commenting out the section:

#ifdef HAVE_SNMP_SESSION_LOCALNAME
if (NULL != CONFIG_SOURCE_IP)
session.localname = CONFIG_SOURCE_IP;
#endif

in zabbix/src/zabbix_server/poller/checks_snmp.c

and creating the file /etc/snmp/zabbix_server.conf:

[snmp] clientaddr 1.2.3.4:40161

Is working for me, although I do get frequent:

13610:20120902:173143.687 item [timor:Port_FastEthernet0_20_InUcastPkts] became not supported: Error doing snmp_open()

I think it is polling the same snmp host with the same fixed source port, so the socket is "busy"? I had to specify the 40161 since default 161 conflicts with snmpd running on zabbix_server host. I think other software using UDP sockets uses a range of port numbers, I'll have to look into that.

[Alex_SYB]

I will have to check this out, my main problem now is i use a precompiled version. have to convince the compiler that there is an issue

Thanks

[dimir]

Related issue: ZBX-3379

[bouba]

Hi,

I upgraded to 2.0.4 on Debian Squeeze, but I still have the issue. By reading ZBX-3379, I can't figure if it is solved without the "iproute" workaround...

No more info please ?

[dimir]

It's solved on the Zabbix side. The bug is resolved, the fix is available in development branch (see the link in comment) until it's closed. When closed - it will appear in "2.0" branch and in 2.0.5 release.

[bouba]

Hi again,

Thanks for previous help/infos.

I'm unable to find when Pre-2.0.5rc1 will become the official 2.0.5 stable. Sorry for that, but I desperately need the SNMP client "SourceIP" patch...any idea about when it will be available ?

Rgds,

[dimir]

2.0.5rc1 will be out in 2-3 weeks. I have attached the patch to ZBX-3379 if you would like to have it earlier.