Warm Spare - have never been able to get working

FreePBX
1

Good evening, all.

I’ve tried on and off a dozen times over the past few years to get the Warm Spare setup working, but have NEVER been able to. The failure is always on getting the keys set up so the warm box doesn’t have to log into the primary box.

https://wiki.freepbx.org/display/FPG/Warm+Spare+Setup

I’m never able to copy the ID file over (password is good for the initial copy, but complains it isn’t). Tried copying manually and changing permissions of the file to the asterisk user, but still no such luck…

Does anyone have any thoughts on why the key exchange element never seems to work?

Thanks.

2

ssh -vvvv user@otherbox -p (port)

might well show what’s not worked

3

OK, that was beautiful - I had no idea you could do verbose logging like that for SSH as well. :slight_smile: (Now, how do I get that logging level back to no logging - it’s now doing it for everything - lol)

It’s likely the key failure is happening because I wasn’t able to use the Wiki method of copying the file over (assuming that does more than just move the file), and my manual method of moving it missed those parts…

Here was the error when trying to issue that copy command in the Wiki:

[root@pbx-admin01a-fpbx14 ~]# sudo -u asterisk ssh-copy-id -i /home/asterisk/.ssh/id_rsa.pub [email protected]
/bin/ssh-copy-id: INFO: Source of key(s) to be installed: “/home/asterisk/.ssh/id_rsa.pub”
/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed – if you are prompted now it is to install the new keys
/home/asterisk/.ssh/[email protected]’s password: debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
Permission denied, please try again.

sudo -u asterisk ssh -vvvv [email protected] -p 22
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 58: Applying options for *
debug2: resolving “10.142.0.2” port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 10.142.0.2 [10.142.0.2] port 22.
debug1: Connection established.
debug1: identity file /home/asterisk/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/asterisk/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/asterisk/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/asterisk/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/asterisk/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/asterisk/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/asterisk/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/asterisk/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.142.0.2:22 as 'asterisk’
debug3: hostkeys_foreach: reading file "/home/asterisk/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/asterisk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 10.142.0.2
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],[email protected],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-dss
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: compression: none
debug1: kex: client->server cipher: [email protected] MAC: compression: none
debug1: kex: curve25519-sha256 need=64 dh_need=64
debug1: kex: curve25519-sha256 need=64 dh_need=64
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:WOnq50vFP1Ik4FFNQUulnOXQY1r/NRsp7j8CEhy2M3M
debug3: hostkeys_foreach: reading file "/home/asterisk/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/asterisk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 10.142.0.2
debug1: Host ‘10.142.0.2’ is known and matches the ECDSA host key.
debug1: Found key in /home/asterisk/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug2: key: /home/asterisk/.ssh/id_rsa (0x55c140d64e50)
debug2: key: /home/asterisk/.ssh/id_dsa ((nil))
debug2: key: /home/asterisk/.ssh/id_ecdsa ((nil))
debug2: key: /home/asterisk/.ssh/id_ed25519 ((nil))
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-keyex
debug3: remaining preferred: gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-keyex
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug2: we did not send a packet, disable method
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure. Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:995)
debug1: Unspecified GSS failure. Minor code may provide more information
No Kerberos credentials available (default cache: KEYRING:persistent:995)
debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/asterisk/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Trying private key: /home/asterisk/.ssh/id_dsa
debug3: no such identity: /home/asterisk/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/asterisk/.ssh/id_ecdsa
debug3: no such identity: /home/asterisk/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/asterisk/.ssh/id_ed25519
debug3: no such identity: /home/asterisk/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
[email protected]’s password: debug3: receive packet: type 2
debug3: Received SSH2_MSG_IGNORE
[root@pbx-admin01a-fpbx14 ~]#

4

the ssh verbosity is ephemeral as far as how many -v’s you use on a particular connection, there should be no “memory” unless you have added it to your .ssh/config or the global one

5

Ended up finding a 5-step tutorial online and incorporated it’s elements into the Wiki instructions, to create this (which now works like a charm):

On RECEIVING System:
sudo -u asterisk ssh-keygen
ssh [email protected] mkdir -p /home/asterisk/.ssh
cat /home/asterisk/.ssh/id_rsa.pub | ssh [email protected] ‘cat >> /home/asterisk/.ssh/authorized_keys’

On SENDING System:
chmod 700 /home/asterisk/.ssh
chmod 640 /home/asterisk/.ssh/authorized_keys
chown asterisk:asterisk .ssh
chown asterisk:asterisk .ssh/authorized_keys

On RECEIVING System (to test):
sudo -u asterisk ssh [email protected]
(Should allow logging in without needing a password)

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