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I have had my ReadyNAS NV+ working fine for years and use SSH remote root access to fix problems as necessary.
Today I did a stupid thing. I SSHd into the ReadNAS and then wanted to SSH out to a local Raspberry Pi, but ReadyNAS SSH baulked with no KEX Alg error. Google told me to add
KexAlgorithms diffie-hellman-group1-sha1 to /etc/ssh/sshd_config (and restarting ssh)!
Which I did without thinking!
Now I cant SSH into the unit using putty as I get a connection rejected message immediately. The Server is working fine for file sharing and I can access the admin page with no problem and my local hosted intra website runs as does myphpadmin.
So my problem is how to ger inot the server to remove my edit to sshd_config back to original..
I was wondering if there was a way of maybe editing a phpscript from the website to invoke the nano editor on the server to enable me to edit the file?
Also would simply reinstalling SSH Root access from frontview rewrite the sshd_config file?
some Googling discovered that there is a serial port on the back panel, under the little screwed plate that is the console port.
There are two rows of 0.1” pins one has 6 pins and the other has 4. The internet info indicated that the 4 pins were 3.3v TTL RXD & TXD. A meter showed the pin outs at 3.3V RXD TXD GND from Left to Right when looking at the pins. Using a USB 3.3v TTL dongle plugged (Dongle TXD to NV+ RXD, Dongle RXD to NV+TXD , GND to GND, 3.3v not connected.) at 9600 8N1 XON/XOFF and pressing CR gave me a login prompt!! logged in and fixed the error and all working again.
I was wondering if there was a way of maybe editing a phpscript from the website to invoke the nano editor on the server to enable me to edit the file?
Also would simply reinstalling SSH Root access from frontview rewrite the sshd_config file?
Maybe, but I think the only way to tell is to try it.
An OS reinstall from the boot menu might possibly work.
A factory default would of course work, but would reformat the disks - so you'd lose your data, and you'd need to reinstall your add-ons.
some Googling discovered that there is a serial port on the back panel, under the little screwed plate that is the console port.
There are two rows of 0.1” pins one has 6 pins and the other has 4. The internet info indicated that the 4 pins were 3.3v TTL RXD & TXD. A meter showed the pin outs at 3.3V RXD TXD GND from Left to Right when looking at the pins. Using a USB 3.3v TTL dongle plugged (Dongle TXD to NV+ RXD, Dongle RXD to NV+TXD , GND to GND, 3.3v not connected.) at 9600 8N1 XON/XOFF and pressing CR gave me a login prompt!! logged in and fixed the error and all working again.
