AirVPN_Europe_SSH-22-AltEntry.sh

[dr_kristau 4]

Hello!

I'm trying to run this shell script on Ubuntu. Using non-SSH .ovpn files work fine with openvpn, but when trying to run this script I get a series of errors which seem to involve missing files. This is what I get:

 

dr_kristau@kristau:~$ cd ~/Downloads
dr_kristau@kristau:~/Downloads$ ./AirVPN_Europe_SSH-22-AltEntry.sh
chmod: cannot access 'sshtunnel.key': No such file or directory

AirVPN SSH Tunnel
Warning: Identity file sshtunnel.key not accessible: No such file or directory.
OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 62.102.148.165 [62.102.148.165] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/dr_kristau/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7p1 Debian-5+deb8u2
debug1: match: OpenSSH_6.7p1 Debian-5+deb8u2 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 62.102.148.165:22 as 'sshtunnel'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:7n0f4LeVwbBFupoTBoHmGsKBg602KxKwe5jWzMHob9A
debug1: Host '62.102.148.165' is known and matches the ECDSA host key.
debug1: Found key in /home/dr_kristau/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/dr_kristau/.ssh/id_rsa
debug1: Trying private key: /home/dr_kristau/.ssh/id_dsa
debug1: Trying private key: /home/dr_kristau/.ssh/id_ecdsa
debug1: Trying private key: /home/dr_kristau/.ssh/id_ed25519
debug1: Next authentication method: password
sshtunnel@62.102.148.165's password: 

The password I have for AirVPN doesn't work here. Is there any more information other than on the page:

 

https://airvpn.org/ssh/

 

as to how to run this script file without error?

 

Many thanks.

[dr_kristau 4]

One small thing for posterity:
 

Warning: Identity file sshtunnel.key not accessible: No such file or directory.

This can be resolved by downloading the sshtunnel.key file from the configuration page.

I'm not sure why I can't get it to work now. Oh well.
 

[zhang888 1065]

You have wrong permissions on the key file.

[dr_kristau 4]

You have wrong permissions on the key file.

 

Now the permissions on the key file are -rw-------

 

What permissions are required?

[dr_kristau 4]

Have now got this working. These are the steps (NB using AirVPN_Europe_SSH-22.sh instead of AirVPN_Europe_SSH-22-AltEntry.sh):

1) modify the AirVPN_Europe_SSH-22.sh so that the path to sshtunnel.key is correct

2) run the file (e.g. sudo /etc/openvpn/AirVPN_Europe_SSH-22.sh)

3) the SSH tunnel is now working - we can now open a new terminal window and run the ovpn file (e.g. sudo openvpn /etc/openvpn/AirVPN_Europe_SSH-22.ovpn)

 

this will give you AirVPN working through an SSH tunnel. To have this work automatically at start up:

1) move the AirVPN_Europe_SSH-22.sh and sshtunnel.key to /etc/network/if-up.d

2) again, modify the path to sshtunnel.key in the AirVPN_Europe_SSH-22.sh

3) rename AirVPN_Europe_SSH-22.ovpn to AirVPN_Europe_SSH-22.conf and put it in the /etc/openvpn/ directory

4) modify /etc/default/openvpn to use the conf file (e.g. AUTOSTART="AirVPN_Europe_SSH-22")

5) reboot

 

this works fine (apart from the fact that the xrdp connection no longer works), but my ISP seems to block this configuration - in under 250 seconds the connection is cut (the line is still open from another machine (without a VPN or SSH tunnel) connected to the same router). Using a plain VPN connection (e.g. AirVPN_Netherlands_UDP-2018.ovpn) works without a problem. I'll check if this is true for all possible Air SSH connections.

[dr_kristau 4]

this works fine (apart from the fact that the xrdp connection no longer works), but my ISP seems to block this configuration - in under 250 seconds the connection is cut (the line is still open from another machine (without a VPN or SSH tunnel) connected to the same router). Using a plain VPN connection (e.g. AirVPN_Netherlands_UDP-2018.ovpn) works without a problem. I'll check if this is true for all possible Air SSH connections.

 

Final one on this (I hope). The cut out in under 250 seconds only seems to occur when opening a tunnel (SSH or SSL) at boot-up time using scripts in the /etc/network/if-up.d - if I let the system boot up without modifying network features and then apply the tunnel and VPN, I don't get this limit.

 

So I created a series of shell scripts on my desktop to compare various protocols all using the Ancha server (NL). I got (% of download speed):

UDP-443:  39%

TCP-443:  81%

SSH-22:    78%

SSL-443:   96%

 

I post this hoping somebody in the future may find it useful.