Seems like a cipher problem on the RouterOS side.
Code: Select all
[admin@MikroTik] > /sys ssh 10.20.2.8
DH_compute_key failed err: error:05066066:lib(5):func(102):reason(102)
[Ticket#2014012866000869]
Mikrotik Team ?
SSH Client Cannot Connect UBNT devices
SSH Client cannot connect AirOS v5.5.8 devices also few other SNR switches.
Seems like a cipher problem on the RouterOS side.
[Ticket#2014012866000869]
Mikrotik Team ?
Seems like a cipher problem on the RouterOS side.
[Ticket#2014012866000869]
Mikrotik Team ?
Re: SSH Client Cannot Connect UBNT devices
Looks like their DH key strength is too low. RouterOS doesn't allow such low security level.
Re: SSH Client Cannot Connect UBNT devices
UBNT has upgraded dropbear from used v0.51 to v2013.59 version. Here is dropbear change log (https://matt.ucc.asn.au/dropbear/CHANGES). Do you think newer dropbear version started to use weaker keys to "increase" security level?
One of the lines say that blowfish is disabled by default. Is it what RouterOS is using?
Thanks!
One of the lines say that blowfish is disabled by default. Is it what RouterOS is using?
Thanks!
Re: SSH Client Cannot Connect UBNT devices
Mikrotik ?UBNT has upgraded dropbear from used v0.51 to v2013.59 version. Here is dropbear change log (https://matt.ucc.asn.au/dropbear/CHANGES). Do you think newer dropbear version started to use weaker keys to "increase" security level?
One of the lines say that blowfish is disabled by default. Is it what RouterOS is using?
Thanks!
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planetcaravan
Member Candidate
- Posts: 267
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Re: SSH Client Cannot Connect UBNT devices
I've noticed the problem is on a particular Ubiquiti build.
Here is what I have on Ubiquiti
On previous build (17762) SSH problem was not present!
Here is what I have on Ubiquiti
Code: Select all
Firmware Version: XW.v5.5.6
Build Number: 18861
Dropbear server v2013.58