Login attempt for nonexistent user on Alpine Linux

Hugo Genesse hugo.genesse at polymtl.ca
Sat Dec 2 01:07:25 AWST 2017


Hi!

First, thanks for your replies. I created another account:

admin:x:100:65533:Linux User,,,:/home/admin:/bin/ash

Here is the output of with -vvv:

debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
admin at 127.0.0.1's password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
admin at 127.0.0.1's password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
admin at 127.0.0.1's password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
admin at 127.0.0.1: Permission denied (publickey,password).

and in the dropbear logs I still get:

[67] Dec 01 17:03:47 Child connection from <IP>:40878
[67] Dec 01 17:03:47 Login attempt for nonexistent user from
[...]

I saw that I could create a configuration file in /etc/dropbear to  
allow root logins by it seems to be enabled by default and I would  
prefer just drop a binary on the device to enable ssh without changes  
to the system. Here is the openwrt page I'm referring:  
https://wiki.openwrt.org/doc/uci/dropbear

Thanks!

"Daniel." <danielhilst at gmail.com> a écrit :

> Can you log in with another user? The root login may be disabled by
> security reasons.
>
> 2017-12-01 13:01 GMT-02:00 Szabolcs Nagy <nsz at port70.net>:
>
>> * Hugo Genesse <hugo.genesse at polymtl.ca> [2017-12-01 04:51:08 +0000]:
>> > I've been trying to use dropbear (compiled myself statically with
>> > ./configure; make STATIC=1) on a Alpine Linux Docker container (Linux
>> > 4.13.12-1-ARCH) with the latest Alpine Docker image (3.6 if I'm not
>> > mistaken). I run dropbear like this: "./dropbear -R" and can't login with
>> > proper credentials. With the "-E" switch I get the following:
>> >
>> >  /root/dropbear -R -E
>> > [59] Dec 01 04:31:32 Running in background
>> > [60] Dec 01 04:31:36 Child connection from <IP>
>> > [60] Dec 01 04:31:36 Login attempt for nonexistent user from <IP>
>> >
>>
>> i think you can use -vvv to see more detailed debug messages
>>
>
>
>
> --
> “If you're going to try, go all the way. Otherwise, don't even start. ..."
>   Charles Bukowski





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