I'm following the guide: http://cdesigner.eu/content/14-cucm-8-free-sftp-solution-backup-ubuntu-1004-server
To install the ubuntu 15 as OpenSSH SFTP backup, but it got the fail on it
Error: Unableto access SFTP server. Please ensure the username and password are correct.
I followed all steps as same:
1) Create group for sftp access (optional) for further platform hardening - sudo groupadd sftpuser
2) Create user account for backup sudo adduser cucm_8 sftpuser and make password during user creation dialog
3) Change ownership of home directory sudo chown root.root /home/cucm_8
4) Alter permission for read and write to home directory of backup user sudo chmod 777 /home/cucm_8
5) Install open-ssh server sudo apt-get install openssh-server
6) Test connectivity to sftp account from FileZilla client (or your preferred supporting secure mode) - transfer and delete file!!!
now I think we have an issue in cipher algorithm configured on linux server and the one supported by CUCM.
Please refer to the following post and check your sshd config.
Also try again the command we previously suggested to transfer files from CUCM through cli and check auth logs on linux server.
Please let let us know
Not sure if you ever figured this out but I had the same problem after updating linux. OpenSSH removed a bunch of insecure ciphers which are still used by a good bit of Cisco stuff. With CCUM 10.0 I had to turn those ciphers back on. In my testing the below works.
Edit /etc/ssh/sshd_config and add:
That could break SSH connections that are dependent on other ciphers. Here is the config snippet I use in sshd_config to allow a server to be an SFTP server for DRS.
KexAlgorithms +diffie-hellman-group1-sha1 KexAlgorithms +diffie-hellman-group-exchange-sha1 Ciphers +aes128-cbc Ciphers +3des-cbc