Re: [Linux-decnet-user] dnping, socket: Connection refused

[Christine C. <chr...@go...>]

Pavel Pokorný wrote:
> 
> <  ------------ Původní zpráva ------------
> <  Od: Christine Caulfield <chr...@go...>
> <  Předmět: Re: [Linux-decnet-user] dnping, socket: Connection refused
> <  Datum: 11.7.2008 15:15:44
> <  ----------------------------------------
> <  Pavel Pokorný wrote:
> <  > <  ------------ Původní zpráva ------------
> <  > <  Od: Christine Caulfield <chr...@go...>
> <  > <  Předmět: Re: [Linux-decnet-user] dnping, socket: Connection refused
> <  > <  Datum: 11.7.2008 14:18:36
> <  > <  ----------------------------------------
> <  > <  Pavel Pokorný wrote:
> <  > <  > Hi all,
> <  > <  > <  >    could anybody help me with following issue? We have 
> CentOS <  > 5.0 server with
> <  > <  DECnet support (kernel-2.6.18-53.1.14.el5.decnet.i686.rpm) and 
> dnprogs
> <  > <  (dnprogs-2.38-1.i386.rpm) installed. On the network is Cisco 
> router <  > that works
> <  > <  like DECnet router. When I try to ping this router via dnping I 
> receive
> <  > <  following response "socket: Connection refused". I sniffered 
> network
> <  > <  communication and investigated that the CentOS server sent "connect
> <  > <  confirm/initiate message" to the router but the router responded 
> with
> <  > <  "disconnect initiate/confirm message" with reason: "The 
> destination <  > end user
> <  > <  does not exist". Does anybody know what is wrong? This 
> communication <  > was working
> <  > <  but unreasonably stopped.
> <  > <  > <  <  <  That message means that the remote end  isn't running 
> a <  > MIRROR object. <  dnping isn't a ping in the same low-level sense 
> that <  > an IP ping is. It <  needs a listening process at the other 
> end to <  > respond to it.
> <  > <  <  -- <  <  Chrissie
> <  > <  <  < <  > Chrissie, thank you for quick answer.
> <  > But interresting for me is following. When I pinged my CentOS from 
> <  > router and sniffered the communication the communication was 
> different. <  > There was not "connect confirm/initiate message" but 
> just "Link service <  > message". In this case there is not 
> authorization, isn't it?
> <  > <  <  Probably yes. Without seeing the trace and/or the error 
> message that <  sounds likely. A proper installation of DECnet on Linux 
> DOES install a <  mirror object (as part of dnetd).
> <  <  <  -- <  <  Chrissie
> <  <  < 
> 
> And do you know if is it possible to turn off this authentication part 
> of DECnet communication (dnping) on CentOS? I mean that CentOS send only 
> "Link service message" without "connect confirm/initiate message". So 
> the CentOS ping will be like router ping.
> 

it will never be the same as a router ping. (see the FAQ for more info) 
but you can disable the authentication, yes.

edit /etc/dnetd.conf so that the mirror line looks like this:

MIRROR         25         N         nobody     internal

--
Chrissie