Run app as root

Take a look at [Pseudo|http://personalpages.tds.net/~brian_hill/pseudo.html].

Why?

What app is it and why do you want to run it as root?

You'd be better off creating a LaunchDaemon that changes the permissions on the bpf devices. For example, one called org.tcpdump.chmod_bpf.plist with the following contents:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
 <key>Label</key>
 <string>org.tcpdump.chmod_bpf</string>
 <key>Program</key>
 <string>/usr/local/bin/chmod_bpf</string>
 <key>RunAtLoad</key>
 <true/>
</dict>
</plist>

Then in /usr/local/bin, you have the chmod_bpf script (owner root:wheel, perm 755) with the contents:

#! /bin/sh
chgrp admin /dev/bpf*
chmod g+rw /dev/bpf*

That way you can set up interfaces without having to run programs as root.

Basically, this is the setup for Wireshark, which I modified from a startup item to a LaunchDaemon following similar advice on the tubes (I take no credit for the idea at all).

Cheers.

Write an AppleScript application that runs the terminal version with authorization.

Then, inquire at http://www.gns3.net/ on how to get it running properly.

Did you look at Pseudo ?
http://personalpages.tds.net/~brian_hill/pseudo.html

It's a very old program, but it still seems to work in OS X 10.6.

You can drag an application icon into the Pseudo window to run the app as root, or you can use Pseudo's File menu to easily create and save a "Launch Document" for an application. Double-clicking such a Launch Document then runs the application as root. You can optionally store the admin password needed for authentication in your keychain.