Ok thank you very much.
I am sending traps on a linux computer (where I am logged as root), and spy
packets there (using an Eth HUB of course, because the STB replies to an
external server (should be hard coded)).
I'll see where the authentication error comes from, (2 monthes ago it was on
snmp v.2 ..)
and see about the trap listener.
Cheers,
Shaiton
2009/12/1 Mike Ayers <mike_ay...@tvworks.com>
> > From: Shaiton [mailto:shaito...@gmail.com]
> > Sent: Friday, November 27, 2009 5:42 AM
>
> > It has been 1 weeks that I tried to speak snmp with my Set Top Box, but
> > I can't.
> > I got the MIB, so I tried to sand many traps but sometimes I got
> > "Authentification failed" (CAS authentification with an unknown
> > server ..)
>
> That doesn't sound like an SNMP error.
>
> > But I tried simple traps like
> >
> > # snmptrap -v 1 -c command 192.168.1.248:161 1.3 "" 6 6 ""
> > 1.3.6.1.4.1.8711.101.13.1.3.8 s "message here"
>
> You are sending the trap to port 161. The well known port for
> receiving traps is 162 - are you sure you don't want to use that?
>
> > which would write the message on the TV.
> > But I got a checksum error (while spying with wireshark).
>
> That probably doesn't matter. It is now common for the UDP
> checksum to be done on the NIC itself, so wireshark will see the packet
> before the checksum is calculated. If you see the same issues with other
> UDP protocols, then worry not.
>
> > Ok I don't know if I can specify the port number like that, if I don't,
> > with
> >
> > # snmptrap -v 1 -c command 192.168.1.248 1.3 "" 6 6 ""
> > 1.3.6.1.4.1.8711.101.13.1.3.8 s "message here"
> >
> > I get an ICMP message "Destination port unreachable" (from the STB to
> > my computer, where snmpd is running).
>
> You are running snmptrap on the STB? Embedded linux? Just
> curious.
>
> On your PC you will want to run a trap listener. Check the man
> pages for snmptrapd and snmptrapd.conf for details. If you cannot be root,
> listen on an alternate port, like 8162.
>
> > snmpwalk answer me that I am not authentified ...
>
> There is no authentication in SNMPv1. This may be another issue.
>
>
> HTH,
>
> Mike
>
>
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