Re: Dropbear support?

[Aris Adamantiadis <aris@xxxxxxxxxxxx>]

Hi Adrian,

A pcap capture taken with tcpdump -s0 or wireshark would be usefull to
begin. I suspect Dropbear is shy and expects libssh to make the first
move and send the first packet of some kind.

Aris
Le 24/09/13 21:56, Adrian Baerlocher a écrit :
> No luck, I'm afraid. In fact, it appears Dropbear ignores the log
> message priority. I will try creating a pcap file next.
> 
> Thanks,
> Adrian
> 
> 
> On 09/24/13, at 1:45 PM, Dustin Oprea <myselfasunder@xxxxxxxxx
> <mailto:myselfasunder@xxxxxxxxx>> wrote:
> 
>> If this is from syslog, syslog might not be configured to allow all
>> logging. That being said, try running the server directly (not as a
>> service). It looks like both the server and the client send errors to
>> STDERR. The server log routine (in svr-session.c):
>>
>> if (!svr_opts.usingsyslog || havetrace)
>> {
>> struct tm * local_tm = NULL;
>> timesec = time(NULL);
>> local_tm = localtime(&timesec);
>> if (local_tm == NULL
>> || strftime(datestr, sizeof(datestr), "%b %d %H:%M:%S", 
>> local_tm) == 0)
>> {
>> /* upon failure, just print the epoch-seconds time. */
>> snprintf(datestr, sizeof(datestr), "%d", (int)timesec);
>> }
>> fprintf(stderr, "[%d] %s %s\n", getpid(), datestr, printbuf);
>> }
>>
>> It looks like error, warning, info, and debug logging all go into
>> STDERR. In this case, it looks like a majority of the messages are
>> LOG_INFOs.
>>
>>
>>
>> Dustin
>>
>> On Tue, Sep 24, 2013 at 12:06 PM, Adrian Baerlocher
>> <adrian@xxxxxxxxxxxx <mailto:adrian@xxxxxxxxxxxx>> wrote:
>>
>>     Logging from the server doesn't provide much help (the disconnect
>>     occurs from client timeout):
>>
>>     dropbear[37646]: Child connection from 127.0.0.1:56535
>>     <http://127.0.0.1:56535/>
>>     dropbear[37646]: Exit before auth: Disconnect received
>>
>>     I'll try creating a pcap file next.
>>
>>     Thanks,
>>     Adrian
>>
>>
>>     On 09/24/13, at 11:49 AM, Andreas Schneider <asn@xxxxxxxxxxxxxx
>>     <mailto:asn@xxxxxxxxxxxxxx>> wrote:
>>
>>     > On Tuesday 24 September 2013 10:04:27 Adrian Baerlocher wrote:
>>     >> Does anyone know of any compatibility issues with Dropbear
>>     >> (dropbear_2013.58)? I'm seeing libssh (0.5.5) time out after
>>     exchanging
>>     >> banners. I'm able to connect via OpenSSH, however.
>>     >
>>     > Could you turn on debugging on the server and find out what's
>>     going wrong? If
>>     > this doesn't give any hint then probably creating a pcap file
>>     will help.
>>     >
>>     > http://git.libssh.org/projects/libssh.git/tree/include/libssh/pcap.h
>>     >
>>     >
>>     >       -- andreas
>>     >
>>     > --
>>     > Andreas Schneider                   GPG-ID: F33E3FC6
>>     > www.cryptomilk.org <http://www.cryptomilk.org/>              
>>      asn@xxxxxxxxxxxxxx <mailto:asn@xxxxxxxxxxxxxx>
>>     >
>>     >
>>
>>
>>
>>
>