Visual Resources

Table C-2 lists the visual resources that are associated with the HTML widget that is used in the Document View window. Specify these resources in the file DECW$USER_DEFAULTS:MOSAIC.DAT in the following format:

Mosaic*anchorColor: cyan

Table C-2 Visual Resources

Resource	Description
anchorColor: color	Specifies the color to shade anchors whose corresponding documents have not previously been visited. (Default is blue3.)
visitedAnchorColor: color	Specifies the color to shade anchors whose corresponding documents have previously been visited. (Default is violetred4.)
activeAnchorFG: color	Specifies the color to shade anchors that are in the process of being activated. (Default is red.)
activeAnchorBG: color	Specifies the color to shade the background of the anchors that are in the process of being activated. (Default is grey80, which is the same color as the background in the browser.)
anchorUnderlines: integer	Specifies the number of lines to draw underneath the unvisited anchors (Valid values: 0, 1, 2, 3) (Default is 1.)
visitedAnchorUnderlines: integer	Specifies the number of lines to draw underneath the visited anchors. Valid values: 0, 1, 2, 3 (Default is 1.)
dashedAnchorUnderlines: Boolean	Sets drawn lines under the unvisited anchors to dashes, if set to true. (Default is false.)
dashedVisitedAnchorUnderlines: Boolean	Sets drawn lines under unvisited anchors to dashes, if set to true. (Default is false.)
colorsPerInlinedImage: integer	Specifies the number of unique colors to allocate for each inlined-image. (Note that this setting does not affect the images that are displayed externally to the NCSA Mosaic browser (for example, GIF images passed to an external viewer).) (Default is 50.)
percentVerticalSpace: integer	Specifies the height of the vertical space between paragraphs, headers and paragraphs, and so on, as expressed as a percentage of the normal line height. (Default is 90.)
reverseInlinedBitmapColors: Boolean	Specifies to reverse foreground and background colors in inlined XBM bitmaps, if set to true. (Default is false.)
verticalScrollOnRight: Boolean	Specifies that the Document View window places its scroll bar on the left side, if set to false. (Default is true.)

Font Resources

Font resources, which are also associated with the HTML widget, can be changed dynamically from the Options menu. Table C-3 lists the font resource names and descriptions.

Table C-3 Font Resources

Resource	Description
font: font	Used in normal formatted text. (Default is "-adobe-times-medium-r-normal-*-17-*-*-*-*-*-iso8859-1".)
italicFont: font	Used in italic formatted text. (Default is "-adobe-times-medium-i-normal-*-17-*-*-*-*-*-iso8859-1".)
boldFont: font	Used in bold formatted text. (Default is "-adobe-times-bold-r-normal-*-17-*-*-*-*-*-iso8859-1".)
fixedFont: font	Used in fixed (typewriter style) formatted text. (Default is "-adobe-courier-medium-r-normal-*-17-*-*-*-*-*-iso8859-1".)
header1Font: font	Used in level 1 headers. (Default is "-adobe-times-bold-r-normal-*-24-*-*-*-*-*-iso8859-1".)
header2Font: font	Used in level 2 headers. (Default is "-adobe-times-bold-r-normal-*-18-*-*-*-*-*-iso8859-1".)
header3Font: font	Used in level 3 headers. (Default is "-adobe-times-bold-r-normal-*-17-*-*-*-*-*-iso8859-1".)
header4Font: font	Used in level 4 headers. (Default is "-adobe-times-bold-r-normal-*-14-*-*-*-*-*-iso8859-1".)
header5Font: font	Used in level 5 headers. (Default is "-adobe-times-bold-r-normal-*-12-*-*-*-*-*-iso8859-1".)
header6Font: font	Used in level 6 headers. (Default is "-adobe-times-bold-r-normal-*-10-*-*-*-*-*-iso8859-1".)
addressFont: font	Used in addresses. (Default is "-adobe-times-medium-i-normal-*-17-*-*-*-*-*-iso8859-1".)
plainFont: font	Used in plaintext regions or preformatted documents. (Default is "-adobe-courier-medium-r-normal-*-14-*-*-*-*-*-iso8859-1".)
listingFont: font	Used in listing regions. (Default is "-adobe-courier-medium-r-normal-*-12-*-*-*-*-*-iso8859-1".)
fixedboldFont: font	Used for bold in fixed (typewriter style) formatted text.
fixeditalicFont: font	Used for italics in fixed (typewriter style) formatted text.
plainboldFont: font	Used for bold in plaintext regions or preformatted documents.
plainitalicFont: font	Used for italic in plaintext regions or preformatted documents.

Proxy Gateway Resources

When your proxy gateway has been established by your network or system administrator, you can use its resources. Table C-4 provides additional details about proxy gateway support in the NCSA Mosaic Version 2.4 browser.

Table C-4 Proxy Gateway Resources

Resource	Description
ftpProxy: String	Used for ftp URLs.
gopherProxy: String	Used for gopher URLs.
httpProxy: String	Used for http URLs.
newsProxy: String	Used for news URLs.
waisProxy: String	Used for wais URLs.
ProxyGateway: String	Used for all access methods.

C.5 Restrictions for Using Mosaic from Behind a Firewall

V1.2--3

The following sections present information about using the ProxyGateway and NoProxy resources with Mosaic to access information on the Internet when security restrictions (that is, a firewall) exist between internal and external network access at your site.

C.5.1 ProxyGateway Resource

NCSA Mosaic Version 2.4 provided in Compaq DECwindows Motif for OpenVMS supports the proxy gateway (ProxyGateway) resource. A proxy gateway is a trusted agent that enables Mosaic to access network information that is either within or outside the firewall, but not both.

When the Mosaic browser is used from behind a firewall, Mosaic can use the proxy gateway to pass network requests to the Internet in a URL formatted address. The proxy gateway returns the results to the Mosaic browser. The process of passing and returning network requests is transparent to the user. You can view documents on the Internet without difficulty.

Note, however, that if the proxy gateway is located outside of your firewall, then information behind the firewall (such as home pages, World Wide Web documents, and Notes files) cannot be accessed by the proxy gateway.

C.5.2 NoProxy Resource

If your site requires the ability to access Internet information both within and outside the firewall, then a version of Mosaic that supports the NoProxy resource is required. This resource allows you to specify a list of domains that should not be consulted by the proxy gateway (that is, access to information in these domains does not go through the proxy gateway).

As previously stated, the NoProxy resource restricts access for the proxy gateway to a set of domains that are not consulted by the proxy gateway. You can specify the NoProxy resource, provided that you have NCSA Mosaic Version 2.4a for OpenVMS, in the file DECW$USER_DEFAULTS:MOSAIC.DAT according to the following format:

Mosaic*ProxyGateway: http://www-proxy.site.org:8080/ Mosaic*NoProxy: localhost, site.org

Where:	Description
www-proxy.site.org	Name of the host that runs the proxy server
8080	Port number through which Mosaic communicates to the proxy server through the firewall
local host, site.org	List of site names, which are separated by commas, excluded from going through the proxy server

Refer to the following URL for additional information about proxy gateways:

http://webservices.web.cern.ch/WebServices/