287268 - Proxy settings disregard "No Proxy For" field

Status: VERIFIED DUPLICATE of bug 287263

(Firefox :: General, defect)

Description

[rtkluttz]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050315 Firefox/1.0+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050315 Firefox/1.0+

Proxy settings do not honor the "No Proxy For" field. Name lookup is still done
at the proxy server. Closest match I found is bug 136789.

****Current method and existing bug reports incorrectly assume that the proxy
server is onsite with the client PC. This is very commonly not the case in many
different scenarios.******

Reproducible: Always

Steps to Reproduce:


1. Set up Firefox or Mozilla for an OFFSITE proxy server (outside of the firewall).
2. Configure the "No Proxy For" field for anything on the local subnet on the
same side of the firewall as the client. Use hostnames or IP ranges... it
doesn't matter.
3. Attempt to browse to a local resource.

Actual Results:  
A DNS failure will occur at the offsite proxy server.

Expected Results:  
Resolve hostnames to the local subnet and bypassed the offsite proxy server.

IE handles this correctly.

Comment 1

[José Jeria]

*** This bug has been marked as a duplicate of 287263 ***