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If you get stuck with a restrictive IT policy, you might have a couple of options. If you are on a corporate BES network, or have access to one, you can ask the administrator to create an open IT policy for your device to use. This might or might not be successful. Administrators have much larger responsibilities than your individual development, and might not want to have loose policies floating around. There are also some online tools available that claim to remove IT policies. In reality, nothing actually removes a policy; the best that can happen is that it replaces the existing policy with a more permissive one. Use such tools at your own risk. The updated policy you receive might not be much better than the one you got rid of. Finally, keep in mind that, even if you do replace an old policy, updated policies will still be pushed to the device every time you connect to a corporate network. Because of this, you might want to avoid using an individual BlackBerry as both a development device and as part of a secure company network. It s more expensive to get two devices, but over the long run you will more than make up for the cost with your increased productivity.

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1. Let the user browse the site as usual (for example, http://mydomain.com/browse). 2. On each browsed page, add a protected link to indicate that the user wants to be authenticated (http://mydomain.com/browse/authenticate). 3. When the user clicks on the authentication link after the authorization, the HTTP realms (domains) that include the unprotected content are assigned in the response (http://mydomain.com/browse). 4. When the user browses the URL http://mydomain.com/browse, user identification information is sent, even though it is not required. This trick works extremely well if you use HTTP digest authentication. The following Apache HTTPD configuration example uses this technique: <Directory "/var/www/browse/authenticate"> AllowOverride AuthConfig AuthType Digest AuthDigestDomain /browse /browse/authenticate AuthDigestFile "/etc/apache2/digestpasswd" AuthName "Private Domain" Require valid-user </Directory> The technique is implemented by the configuration item AuthDigestDomain, where both the URLs /browse and /browse/authenticate are referenced. Because the configuration item Directory references the URL /browse/authenticate, only the URL /browse/authenticate will be challenged for an authentication. To illustrate that the technique actually works, consider the following HTTP conversation. First, a request is made for an unprotected resource: GET /browse/ HTTP/1.1 Host: jupiter:8100 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041220 K-Meleon/0.9 Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9, text/plain;q=0.8,image/png,*/*;q=0.5 The server responds as usual with an HTTP 200 return code, which causes the client to load the resulting page. Then the client makes another request to the protected link, because the user wants to shop and needs to be authenticated. The client makes the following request for the protected content: GET /browse/authenticate HTTP/1.1 Host: 192.168.1.103:8100 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041220 K-Meleon/0.9 Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9, text/plain;q=0.8,image/png,*/*;q=0.5

(Of course, in many cases, you don t want to do so at the expense of bringing a SAN down unless there s a compelling reason for the upgrade) Once your switches are running the latest firmware, you can administer most through a Web-based interface You also want to prevent any interruption in communications with your targets This includes Registered State Change Notifications (RSCNs), which should be suppressed on initiator ports for all switches Typically, a client sends an RSCN when connecting to a fabric, and that can cause communications interrupts Because client workstations tend to reboot often, suppressing RSCN on initiator ports ensures that communication between initiators and targets remains uninterrupted You should also make sure that communications occur at the appropriate speed.

Your development device aside, you must decide if and how you want to handle devices with security policies that interfere with the running of your app. In one sense, there s nothing you can do. Applications execute in a sandbox, and the security policy is far beyond the reach of that sandbox. Your app cannot replace the IT policy, cannot disable it, and cannot even pre-emptively determine whether or not a restrictive policy is installed.

If a switch and a target or a switch and a LUN are both capable of running at 4Gbps, you should verify that the link appears as 4Gbps on both ends Switches, targets, and initiators assign speeds automatically (in much the way most Ethernet cards and switches auto-sense), so you don t usually have to statically set a port s speed But as you add new devices to your fabric, verify that they communicate at the proper rate When a SAN client displays poor performance or high latency, statically assigning link type and speed can sometimes address the issue Also, Promise support advises that you statically configure controllers with these settings to reduce latency..

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