Ssh – How to disable encryption on openssh

encryptionperformancePROXYsocksssh

I'm having performance problems using openssh (server) and putty (client) combination to use a remote webproxy. I'd like to disable encryption and test the results to see if it makes a difference. How can i do that? Is there anything i can modify in the sshd_config. I'm very new to openssh.

Any other ideas would be appreciated.

I've basically set my IE to use 127.0.0.1 socks as a proxy. I connect my putty to my openssh server at home and voila – I'm able to browse the internet through that. However, it's incredibly slow even though I know I have a fast connection to my home (ftp for example works at above 50Kbytes/sec.

Best Answer

Without recompiling anything, it cannot be done as far as I am aware. You can however switch to ARC4 or Blowfish which are preposterously fast on modern hardware.

The BEST performance (as far as clock cycles are concerned) increase you can get is with adding

compression no

You can do this by changing

ciphers         aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
                aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,
                aes256-cbc,arcfour

to

ciphers         arcfour,blowfish-cbc

If you want to squeeze some extra performance out at the risk of incompatibility you can change 

macs  hmac-md5,hmac-sha1,umac-64@openssh.com,
      hmac-ripemd160,hmac-sha1-96,hmac-md5-96

to 

macs  hmac-md5-96

If you still think this is too much overhead, you could revert back to v1 or just do a standard VPN.

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