Cisco Cisco Web Security Appliance S360 故障排查指南
Putty Returns Error "Proxy error: 407 Proxy
Authentication Required"
Authentication Required"
Document ID: 117948
Contributed by Josh Wolfer and Siddharth Rajpathak, Cisco TAC
Engineers.
Jul 16, 2014
Engineers.
Jul 16, 2014
Contents
Problem
Symptoms: When using Putty to tunnel (CONNECT) through the WSA, you receive "Proxy error: 407 Proxy
Authentication Required", even after including a username / password in the Putty configuration.
Authentication Required", even after including a username / password in the Putty configuration.
Environment: Cisco Web Security Appliance (WSA), all versions of AsyncOS
Solution
Putty only supports HTTP Basic authentication. It does NOT support NTLM authentication. If the WSA is
configured for NTLM authentication only, Putty will return this error message.
configured for NTLM authentication only, Putty will return this error message.
If WSA is configured to use 'NTLMSSP or Basic' authentication scheme, then authentication should work
properly.
properly.
On AsyncOS versions 7.x and above, the 'NTLMSSP or Basic' authentication scheme is configured in
Identities under GUI −−> Web Security Manager −−> Identities −−> "Define Members by Authentication"
section.
Identities under GUI −−> Web Security Manager −−> Identities −−> "Define Members by Authentication"
section.
Updated: Jul 16, 2014
Document ID: 117948