Ognjen,

On 11/19/15 10:14 AM, Ognjen Blagojevic wrote:
> My webapp have a set of resources, let's call that set R. Some of those
> resources need to be accessed only from certain source IP addresses,
> let's call that subset R'. And some subset of R' (let's call it R'')
> needs authentication.
> 
> I have a reqirement to check source IP address before authentication.
> 
> Right now, R' is specified in web.xml RemoteAddrFilter <url-pattern>s,
> and R'' is specified in web.xml <security-constraint> <url-pattern>s.
> 
> The problem is, filters are executed after container-managed
> authentication, so login form is presented to the user before
> RemoteAddrFilter kicks in, and check source IP address. That is not what
> I need. Users outside trusted IP ranges should not be able to even know
> about the protected resources, let alone to guess passwords.
> 
> RemoteAddrValve, on the other hand, is called before container-managed
> authentication, but it does not allow specifying <url-pattern>s.
> 
> What would be a good solution for the above requirement? Extend
> RemoteAddrValve with the ability to specify <url-pattern>s?

I think that may be the only way to do it. IIRC, someone did some work
to allow Filters to be used in the valve chain, but I don't think there
is any facility for specifying <url-pattern>s for those.

-chris

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