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Ozeki Phone System XE has several tools to protect the PBX from malicious intents. You can use the IP Blacklist and the Anti-Hacking feature for the purpose to do not let particular IP addresses to access to the PBX.
This topic will introduce the IP Blacklist and the Security incidents elements of Ozeki Phone System XE.
The IP Blacklist is a list of IP addresses, which are not able to reach the PBX for a previously set period of time.
This guide shows how to add IP address(es) to the IP Blacklist manually. To learn more about the Anti-Hacking feature, please click here
In the PBX features menu, click the Preferences submenu as Figure 1 shows:
Figure 1 - choose the PBX features menu’s Preferences submenu
Here, You have several configuration options, such as Security incidents, IP Blacklist etc. Since You would like to manage the blacklist, You need to click on the IP Blacklist option (Figure 2):
Figure 2 - select the IP Blacklist option in the Configure menu
At the IP Blacklist panel You can add IP address(es) to the blacklist, or You can manage the previously added ones. To add a new entry to the list, You need to click on one of the Add buttons, as Figure 3 shows.
Figure 3 - to manually add IP address(es) to the blacklist, click on an Add button
The following form will appear, as Figure 4 shows:
Figure 4 - the Blacklist settings form
The first three of the settings must be set (these are indicated on the screen with bold label and a red "*" character at the right of them), and one of them is optional:
If the list contains any entries, You can find those under the IP Blacklist option (where You were adding the new ones). Here, You can modify the previously set parameters, or You can even delete them, or the whole entry. There is a way to delete more entries in the same time (see below, at the selector checkbox column). Figure 5 shows us a blacklist, which contains an entry.
Figure 5 - the IP Blacklist with one entry
Every row means an entry, and You can find here the previously set informations under the column names, and as You can see, these informations in the example entry were given at the adding as:
There are three new columns on the screen:
If the list contains more entries, You can sort them by the columns. To do this, You need to left click on the column’s name, and to reverse the order of the sorting, click the column’s name once again.
At the bottom right corner of the screen, You can find how many entries does the list have, and which ones are being shown (by the pages number). There, You can also set how many entries should be shown per page.
The access will be denied until the expiration date ends, if You try to reach the PBX’s GUI from an address, which is on the Blacklist. In this case, You will see something similar to Figure 6.
Figure 6 - the access is denied, since the IP address is on the PBX’s IP Blacklist
You are not able to access to the PBX with any of the extensions, if your IP address is on the blacklist. Usually, You are just getting a message about the failed registration, but if You are using the tools of the Ozeki VoIP SIP SDK to develop your softphone, You can set the application to inform the user about the reason of the failure, like the Demo Application does on Figure 7:
Figure 7 - the demo application shows the reason of the unsuccessful registration
If You have installed Ozeki VoIP SIP SDK, the Demo Application is located in the Examples folder
in the installation directory. You can download the SDK at: Ozeki VoIP SIP SDK.
If You don’t want to develop a new softphone, You can try an existing one by downloading Ozeki XD Phone at:
Ozeki XD Phone.
This is a free softphone, which is also capable to make 2D and 3D video calls.
Ozeki Phone System XE provides options to handle the events, when there is one or more failed login attempt, authentication request or unanswered challenge requests. With setting these system security parameters, You can also defend the PBX from malicious intents.
This guide introduces the available options, and shows how to set the system security parameters for this purpose.
In the PBX features menu, click the Preferences submenu as Figure 1 shows:
Figure 1 - choose the PBX features menu’s Preferences submenu
Here, You have several configuration options, such as Security incidents, IP Blacklist etc. You would like to learn about the Security incidents, so You need to click on the Security incidents option (Figure 2).
Figure 2 - select the Security incidents option in the Configure menu
At the Anti-Hacking form, there are several options, which can be set:
Figure 3 - the form to set the system security parameters
You can write the "-1" value into the fields, which means: never add the IP address to the Blacklist by the current reason.
For more information about the IP Blacklist, please click here
.
After the parameters are set and the OK button is clicked, the Anti-Hacking feature starts to do its job.
You can try these options by using a softphone. If You have installed Ozeki VoIP SIP SDK, the Demo Application is
located in the Examples folder in the installation directory, or You can even develop your own softphone with
the tools of the SDK. You can download the SDK at: Ozeki VoIP SIP SDK.
If You don’t want to develop a new softphone, You can try an existing one by downloading Ozeki XD Phone at: Ozeki XD Phone. This is a free softphone, which is also capable to make 2D and 3D video calls.
If you have any questions or need assistance, please contact us at info@ozekiphone.com
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