300-730 · Question #225
Refer to the exhibit. An engineer recently applied several configuration changes to a Cisco Adaptive Security Appliance; however, users report that a web app requiring Java plug-ins has stopped…
The correct answer is C. The `http-only-cookie` command prevents the Java plug-ins from accessing the session cookie, causing the app to fail. The http-only-cookie enable command sets the HTTPOnly attribute on Clientless SSL VPN session cookies, which blocks Java plug-ins from reading the session cookie and causes Java-dependent web apps to fail.
Question
webvpn
enable outside
http-only-cookie enable
svc ask none default svc enable
port-forward auto
Options
- AThe
svc ask nonecommand is blocking the required Java plug-ins for the app. - BThe
port-forward autocommand is preventing the ASA from recognizing the Java plug-ins, causing the plug-in to be blocked. - CThe
http-only-cookiecommand prevents the Java plug-ins from accessing the session cookie, causing the app to fail. - DThe
enable outsidecommand is misconfigured and blocking external web traffic.
How the community answered
(48 responses)- A8% (4)
- B6% (3)
- C67% (32)
- D19% (9)
Why each option
The `http-only-cookie enable` command sets the HTTPOnly attribute on Clientless SSL VPN session cookies, which blocks Java plug-ins from reading the session cookie and causes Java-dependent web apps to fail.
The `svc ask none default svc` command controls which VPN mode is offered to connecting clients by default and has no effect on Java plug-in loading or functionality within a Clientless SSL VPN session.
The `port-forward auto` command enables Clientless SSL VPN port forwarding for TCP-based application proxying and does not interfere with Java plug-in detection or execution in the WebVPN portal.
When `http-only-cookie enable` is configured on a Cisco ASA, the HTTPOnly flag is applied to the WebVPN session cookie. Java plug-ins and applets use the Java networking API to access session cookies for portal authentication; the HTTPOnly attribute explicitly blocks any non-HTTP access to that cookie, including Java, causing Java plug-in dependent applications to fail within the Clientless SSL VPN portal.
The `enable outside` command is the standard, required syntax to activate WebVPN on the outside interface of the ASA; it does not selectively block external web traffic or Java plug-in content when correctly configured.
Concept tested: ASA Clientless SSL VPN http-only-cookie blocking Java plug-ins
Source: https://www.cisco.com/c/en/us/td/docs/security/asa/asa96/configuration/vpn/asa-96-vpn-config/vpn-webvpn.html
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