Proxy Server and SFTP routing

Linux and Unix-Like UNIX and Linux Applications
1

Hi Friends,

I am trying to connect to remote server via proxy server and transfer files from my server .

the proxy server is windows.

I wanted to know is that is it possible?

I am using command to connect is

/usr/local/bin/sftp -o "ProxyCommand nc proxyserver.com 8080"(E-Mail address blocked: See forum rules) 22

Could some one tell me whether above command is valid?

Could someone please share the command to connect to remote server via proxy?

Thanks,
Reddy

2

Check out the info on these links:
General :: How To Sftp Using A SOCKS V5 Proxy
how to sftp using a SOCKS v5 proxy
unix - How do I connect to a server behind an socks5 proxy through SSH on mac/linux? - Server Fault
https://kb.bluecoat.com/index?page=content&id=FAQ1397&actp=RSS

1 Like
3

Hi Spacebar,

Thanks for your quick reply!!!

I got the below command and ran

/usr/local/bin/sftp -oIdentityFile=/x0/xxxxx/yyyyy/.ssh/key_name -o "ProxyCommand nc proxy.server.com 8080 %h %p" user@remoteserver.com 22

When I run this command from server xyz via proxy server proxy.server.com to remote server remoteserver.com I am getting message

Connecting to remoteserver.com.... and prompt never comes back and no connection being made to remote server.

DO you think the command I am using is incorrect way?

Thanks,
Reddy

4

Try it like this, I've also added the "-v" switches so you should get more verbage of what is happening:

sftp -v -oIdentityFile=/x0/xxxxx/yyyyy/.ssh/key_name -oProxyCommand='/usr/bin/nc -v -xproxy.server.com:1080 %h %p' user@remote_sftp_server.com 22
5

Hi Spacebar

I ran below command

/usr/local/bin/sftp -v -oIdentityFile=/x0/xxxxx/yyyyy/.ssh/key_name -oProxyCommand="/usr/bin/nc -v proxy.server.com 8080 %h %p" user@remote_sftp_server.com 22

Connecting to remote_sftp_server.com...
OpenSSH_4.5p1, OpenSSL 0.9.8d 28 Sep 2006
debug1: Reading configuration data /usr/local/etc/ssh_config
debug1: Executing proxy command: exec /usr/bin/nc -v proxy.server.com 8080 remote_sftp_server.com 22
debug1: permanently_drop_suid: 620026
debug1: identity file /x0/xxxxx/yyyyy/.ssh/key_name type -1
proxy.server.com [XXX.XX.XXX.XX] 8080 (?) open

Once again thanks alot for you help!!!

6

Dear All, I apologize for putting my server issue in existing thread, but my issue is same and bit urgent. I appreciate if you guys can help.

Hello Experts,

I need an urgent help. I have to make sftp connection to the remote server where I have to put and get files. Using "put" and "get".

But I am unable to login to sftp site on internet from my local server.

Please help

---------- Post updated at 09:47 AM ---------- Previous update was at 06:54 AM ----------

Little improvement,,..after giving docket address, the error changed

[root@test1 ~]# sftp -o "ProxyCommand /usr/bin/nc -X connect 10.105.54.134:8080 %h %p" User@files12.server.net 22

Please suggest!!! It is really critical.

7

Try it like this and post the additional messages logged:

sftp -v -oProxyCommand='/usr/bin/nc -v -x10.105.54.134:8080 %h %p' User@files12.server.net 22