Comtrend AR-5389 AR-5389 User Manual AR 5389 3

Comtrend Corporation AR-5389 AR 5389 3

AR-5389_user manual-3

99 Auto(IKE) Key Exchange Method Pre-Shared Key / Certificate (X.509) Input Pre-shared key / Choose Certificate Perfect Forward Secrecy Enable or Disable Advanced IKE Settings Select Show Advanced Settings to reveal the advanced settings options shown below. Advanced IKE Settings Select Hide Advanced Settings to hide the advanced settings options shown above. Phase 1 / Phase 2 Choose settings for each phase, the available options are separated with a “/” character. Mode Main / Aggressive Encryption Algorithm DES / 3DES / AES 128,192,256 Integrity Algorithm MD5 / SHA1 Select Diffie-Hellman Group 768 – 8192 bit Key Life Time Enter your own or use the default (1 hour) The Manual key exchange method options are summarized in the table below.
100 Manual Key Exchange Method Encryption Algorithm DES / 3DES / AES (aes-cbc) Encryption Key DES: 16 digit Hex, 3DES: 48 digit Hex Authentication Algorithm MD5 / SHA1 Authentication Key MD5: 32 digit Hex, SHA1: 40 digit Hex SPI (default is 101) Enter a Hex value from 100-FFFFFFFF
101 5.17 Certificate A certificate is a public key, attached with its owner’s information (company name, server name, personal real name, contact e-mail, postal address, etc) and digital signatures. There will be one or more digital signatures attached to the certificate, indicating that these entities have verified that this certificate is valid. 5.17.1 Local CREATE CERTIFICATE REQUEST Click Create Certificate Request to generate a certificate-signing request. The certificate-signing request can be submitted to the vendor/ISP/ITSP to apply for a certificate. Some information must be included in the certificate-signing request. Your vendor/ISP/ITSP will ask you to provide the information they require and to provide the information in the format they regulate. Enter the required information and click Apply to generate a private key and a certificate-signing request.
102 The following table is provided for your reference. Field Description Certificate Name A user-defined name for the certificate. Common Name Usually, the fully qualified domain name for the machine. Organization Name The exact legal name of your organization. Do not abbreviate. State/Province Name The state or province where your organization is located. It cannot be abbreviated. Country/Region Name The two-letter ISO abbreviation for your country.
103 IMPORT CERTIFICATE Click Import Certificate to paste the certificate content and the private key provided by your vendor/ISP/ITSP into the corresponding boxes shown below. Enter a certificate name and click Apply to import the local certificate.
104 5.17.2 Trusted CA CA is an abbreviation for Certificate Authority, which is a part of the X.509 system. It is itself a certificate, attached with the owner information of this certificate authority; but its purpose is not encryption/decryption. Its purpose is to sign and issue certificates, in order to prove that these certificates are valid. Click Import Certificate to paste the certificate content of your trusted CA. The CA certificate content will be provided by your vendor/ISP/ITSP and is used to authenticate the Auto-Configuration Server (ACS) that the CPE will connect to.
105 Enter a certificate name and click Apply to import the CA certificate.
106 5.18 Multicast Input new IGMP or MLD protocol configuration fields if you want modify default values shown. Then click Apply/Save.
107 Chapter 6 Wireless The Wireless menu provides access to the wireless options discussed below. 6.1 Security The following screen appears when Wireless Security is selected. The options shown here allow you to configure security features of the wireless LAN interface. Click Save/Apply to implement new configuration settings. WIRELESS SECURITY Wireless security settings can be configured according to Wi-Fi Protected Setup (WPS) or Manual Setup. The WPS method configures security settings automatically (see 6.1.1 WPS) while the Manual Setup method requires that the user configure these settings using the Web User Interface (see the table below).
108 Select SSID Select the wireless network name from the drop-down box. SSID stands for Service Set Identifier. All stations must be configured with the correct SSID to access the WLAN. If the SSID does not match, that client will not be granted access. Network Authentication This option specifies whether a network key is used for authentication to the wireless network. If network authentication is set to Open, then no authentication is provided. Despite this, the identity of the client is still verified. Each authentication type has its own settings. For example, selecting 802.1X authentication will reveal the RADIUS Server IP address, Port and Key fields. WEP Encryption will also be enabled as shown below. The settings for WPA authentication are shown below. The settings for WPA-PSK authentication are shown next.
109 WEP Encryption This option specifies whether data sent over the network is encrypted. The same network key is used for data encryption and network authentication. Four network keys can be defined although only one can be used at any one time. Use the Current Network Key list box to select the appropriate network key. Security options include authentication and encryption services based on the wired equivalent privacy (WEP) algorithm. WEP is a set of security services used to protect 802.11 networks from unauthorized access, such as eavesdropping; in this case, the capture of wireless network traffic. When data encryption is enabled, secret shared encryption keys are generated and used by the source station and the destination station to alter frame bits, thus avoiding disclosure to eavesdroppers. Under shared key authentication, each wireless station is assumed to have received a secret shared key over a secure channel that is independent from the 802.11 wireless network communications channel. Encryption Strength This drop-down list box will display when WEP Encryption is enabled. The key strength is proportional to the number of binary bits comprising the key. This means that keys with a greater number of bits have a greater degree of security and are considerably more difficult to crack. Encryption strength can be set to either 64-bit or 128-bit. A 64-bit key is equivalent to 5 ASCII characters or 10 hexadecimal numbers. A 128-bit key contains 13 ASCII characters or 26 hexadecimal numbers. Each key contains a 24-bit header (an initiation vector) which enables parallel decoding of multiple streams of encrypted data. 6.1.1 WPS Wi-Fi Protected Setup (WPS) is an industry standard that simplifies wireless security setup for certified network devices. Every WPS certified device has a PIN number accessed through device software. The AR-5389 has a virtual button accessible from the web user interface (WUI). Devices with the WPS logo (shown here) support WPS. If the WPS logo is not present on your device it still may support WPS, in this case, check the device documentation for the phrase “Wi-Fi Protected Setup”. NOTE: WPS is only available in Open, WPA-PSK, WPA2-PSK and Mixed WPA2/WPA-PSK network authentication modes. Other authentication modes do not use WPS so they must be configured manually.
110 To configure security settings with WPS, follow the procedures below. You must choose either the Push-Button or PIN configuration method for Steps 6 and 7. I. Setup Step 1: Enable WPS by selecting Enabled from the drop down list box shown. Step 2: Set the WPS AP Mode. Configured is used when the AR-5389 will assign security settings to clients. Unconfigured is used when an external client assigns security settings to the AR-5389. NOTES: Your client may or may not have the ability to provide security settings to the AR-5389. If it does not, then you must set the WPS AP mode to Configured. Consult the device documentation to check its capabilities. In addition, using Windows Vista, you can add an external registrar using the StartAddER button (Appendix D - WPS OPERATION) has detailed instructions). II. NETWORK AUTHENTICATION Step 3: Select Open, WPA-PSK, WPA2-PSK, or Mixed WPA2/WPA-PSK network authentication mode from the Manual Setup AP section of the Wireless Security screen. The example below shows WPA2-PSK mode.
111 Step 4: For the Pre-Shared Key (PSK) modes, enter a WPA Pre-Shared Key. You will see the following dialog box if the Key is too short or too long. Step 5: Click the Save/Apply button at the bottom of the screen. IIIa. PUSH-BUTTON CONFIGURATION The WPS push-button configuration provides a semi-automated configuration method. The WPS button on the rear panel of the router can be used for this purpose or the Web User Interface (WUI) can be used exclusively. The WPS push-button configuration is described in the procedure below. It is assumed that the Wireless function is Enabled and that the router is configured as the Wireless Access Point (AP) of your WLAN. In addition, the wireless client must also be configured correctly and turned on, with WPS function enabled. NOTE: The wireless AP on the router searches for 2 minutes. If the router stops searching before you complete Step 7, return to Step 6. Step 6: Press WPS button Press the WPS button on the front panel of the router. The WPS LED will blink to show that the router has begun searching for the client.
112 Step 7: Go to your WPS wireless client and activate the push-button function. A typical WPS client screenshot is shown below as an example. Now go to Step 8 (part IV. Check Connection) to check the WPS connection. IIIb. WPS – PIN CONFIGURATION Using this method, security settings are configured with a personal identification number (PIN). The PIN can be found on the device itself or within the software. The PIN may be generated randomly in the latter case. To obtain a PIN number for your client, check the device documentation for specific instructions. The WPS PIN configuration is described in the procedure below. It is assumed that the Wireless function is Enabled and that the router is configured as the Wireless Access Point (AP) of your wireless LAN. In addition, the wireless client must also be configured correctly and turned on, with WPS function enabled. NOTE: Unlike the push-button method, the pin method has no set time limit. This means that the router will continue searching until it finds a client. Step 6: Select the PIN radio button in the WSC Setup section of the Wireless Security screen, as shown in A or B below, and then click the appropriate button based on the WSC AP mode selected in step 2. A - For Configured mode, click the Add Enrollee button. Enter STA PIN: a Personal Identification Number (PIN) has to be read from either a sticker or the display on the new wireless device. This PIN must then be inputted at representing the network, usually the Access Point of the network. B - For Unconfigured mode, click the Config AP button.
113 Step 7: Activate the PIN function on the wireless client. For Configured mode, the client must be configured as an Enrollee. For Unconfigured mode, the client must be configured as the Registrar. This is different from the External Registrar function provided in Windows Vista. The figure below provides an example of a WPS client PIN function in-progress. Now go to Step 8 (part IV. Check Connection) to check the WPS connection. IV. CHECK CONNECTION Step 8: If the WPS setup method was successful, you will be able access the wireless AP from the client. The client software should show the status. The example below shows that the connection established successfully. You can also double-click the Wireless Network Connection icon from the Network Connections window (or the system tray) to confirm the status of the new connection.
114 6.2 MAC Filter This option allows access to the router to be restricted based upon MAC addresses. To add a MAC Address filter, click the Add button shown below. To delete a filter, select it from the MAC Address table below and click the Remove button. Option Description Select SSID Select the wireless network name from the drop-down box. SSID stands for Service Set Identifier. All stations must be configured with the correct SSID to access the WLAN. If the SSID does not match, that user will not be granted access. MAC Restrict Mode Disabled: MAC filtering is disabled. Allow: Permits access for the specified MAC addresses. Deny: Rejects access for the specified MAC addresses. MAC Address Lists the MAC addresses subject to the MAC Restrict Mode. A maximum of 60 MAC addresses can be added. Every network device has a unique 48-bit MAC address. This is usually shown as xx.xx.xx.xx.xx.xx, where xx are hexadecimal numbers. After clicking the Add button, the following screen appears. Enter the MAC address in the box provided and click Save/Apply.
115 6.3 Wireless Bridge This screen allows for the configuration of wireless bridge features of the WIFI interface. See the table beneath for detailed explanations of the various options. Click Save/Apply to implement new configuration settings. Feature Description AP Mode Selecting Wireless Bridge (aka Wireless Distribution System) disables Access Point (AP) functionality, while selecting Access Point enables AP functionality. In Access Point mode, wireless bridge functionality will still be available and wireless stations will be able to associate to the AP. Bridge Restrict Selecting Disabled disables wireless bridge restriction, which means that any wireless bridge will be granted access. Selecting Enabled or Enabled (Scan) enables wireless bridge restriction. Only those bridges selected in the Remote Bridges list will be granted access. Click Refresh to update the station list when Bridge Restrict is enabled.
116 6.4 Advanced The Advanced screen allows you to configure advanced features of the wireless LAN interface. You can select a particular channel on which to operate, force the transmission rate to a particular speed, set the fragmentation threshold, set the RTS threshold, set the wakeup interval for clients in power-save mode, set the beacon interval for the access point, set XPress mode and set whether short or long preambles are used. Click Save/Apply to set new advanced wireless options.
117 Field Description Band Set to 2.4 GHz for compatibility with IEEE 802.11x standards. The new amendment allows IEEE 802.11n units to fall back to slower speeds so that legacy IEEE 802.11x devices can coexist in the same network. IEEE 802.11g creates data-rate parity at 2.4 GHz with the IEEE 802.11a standard, which has a 54 Mbps rate at 5 GHz. (IEEE 802.11a has other differences compared to IEEE 802.11b or g, such as offering more channels.) Channel Drop-down menu that allows selection of a specific channel. Auto Channel Timer (min) Auto channel scan timer in minutes (0 to disable) 802.11n/EWC An equipment interoperability standard setting based on IEEE 802.11n Draft 2.0 and Enhanced Wireless Consortium (EWC) Bandwidth Select 20GHz or 40GHz bandwidth. 40GHz bandwidth uses two adjacent 20GHz bands for increased data throughput. Control Sideband Select Upper or Lower sideband when in 40GHz mode. 802.11n Rate Set the physical transmission rate (PHY). 802.11n Protection Turn Off for maximized throughput. Turn On for greater security. Support 802.11n Client Only Turn Off to allow 802.11b/g clients access to the router. Turn On to prohibit 802.11b/g clients access to the router. RIFS Advertisement One of several draft-n features designed to improve efficiency. Provides a shorter delay between OFDM transmissions than in802.11a or g. OBSS Co-Existence Co-existence between 20 MHZ AND 40 MHZ overlapping Basic Service Set (OBSS) in WLAN. RX Chain Power Save Enabling this feature turns off one of the Receive chains, going from 2x2 to 2x1 to save power. RX Chain Power Save Quiet Time The number of seconds the traffic must be below the PPS value below before the Rx Chain Power Save feature activates itself. RX Chain Power Save PPS The maximum number of packets per seconds that can be processed by the WLAN interface for a duration of Quiet Time, described above, before the Rx Chain Power Save feature activates itself. 54g Rate Drop-down menu that specifies the following fixed rates: Auto: Default. Uses the 11 Mbps data rate when possible but drops to lower rates when necessary. 1 Mbps, 2Mbps, 5.5Mbps, or 11Mbps fixed rates. The appropriate setting is dependent on signal strength. Multicast Rate Setting for multicast packet transmit rate (1-54 Mbps) Basic Rate Setting for basic transmission rate.
118 Field Description Fragmentation Threshold A threshold, specified in bytes, that determines whether packets will be fragmented and at what size. On an 802.11 WLAN, packets that exceed the fragmentation threshold are fragmented, i.e., split into, smaller units suitable for the circuit size. Packets smaller than the specified fragmentation threshold value are not fragmented. Enter a value between 256 and 2346. If you experience a high packet error rate, try to slightly increase your Fragmentation Threshold. The value should remain at its default setting of 2346. Setting the Fragmentation Threshold too low may result in poor performance. RTS Threshold Request to Send, when set in bytes, specifies the packet size beyond which the WLAN Card invokes its RTS/CTS mechanism. Packets that exceed the specified RTS threshold trigger the RTS/CTS mechanism. The NIC transmits smaller packet without using RTS/CTS. The default setting of 2347 (maximum length) disables RTS Threshold. DTIM Interval Delivery Traffic Indication Message (DTIM) is also known as Beacon Rate. The entry range is a value between 1 and 65535. A DTIM is a countdown variable that informs clients of the next window for listening to broadcast and multicast messages. When the AP has buffered broadcast or multicast messages for associated clients, it sends the next DTIM with a DTIM Interval value. AP Clients hear the beacons and awaken to receive the broadcast and multicast messages. The default is 1. Beacon Interval The amount of time between beacon transmissions in milliseconds. The default is 100 ms and the acceptable range is 1 – 65535. The beacon transmissions identify the presence of an access point. By default, network devices passively scan all RF channels listening for beacons coming from access points. Before a station enters power save mode, the station needs the beacon interval to know when to wake up to receive the beacon (and learn whether there are buffered frames at the access point). Global Max Clients The maximum number of clients that can connect to the router. Xpress TM Technology Xpress Technology is compliant with draft specifications of two planned wireless industry standards. Transmit Power Set the power output (by percentage) as desired. WMM (Wi-Fi Multimedia) The technology maintains the priority of audio, video and voice applications in a Wi-Fi network. It allows multimedia service get higher priority. WMM No Acknowledgement Refers to the acknowledge policy used at the MAC level. Enabling no Acknowledgement can result in more efficient throughput but higher error rates in a noisy Radio Frequency (RF) environment. WMM APSD This is Automatic Power Save Delivery. It saves power.
119 6.5 Site Survey The following graph displays wireless APs found in your neighborhood by channel.
120 6.6 Station Info This page shows authenticated wireless stations and their status. Click the Refresh button to update the list of stations in the WLAN. Consult the table below for descriptions of each column heading. Heading Description MAC Lists the MAC address of all the stations. Associated Lists all the stations that are associated with the Access Point, along with the amount of time since packets were transferred to and from each station. If a station is idle for too long, it is removed from this list. Authorized Lists those devices with authorized access. SSID Lists which SSID of the modem that the stations connect to. Interface Lists which interface of the modem that the stations connect to.
121 6.7 WiFi Button This page allows you to enable or disable the WiFi Button.
122 Chapter 7 Diagnostics 7.1 Diagnostics – Individual Tests The first Diagnostics screen is a dashboard that shows overall connection status. If a test displays a fail status, click the button to retest and confirm the error. If a test continues to fail, click Help and follow the troubleshooting procedures.
123 7.2 Fault Management Please note this function is not available on the AR-5389. Item Description Maintenance Domain (MD) Level Management space on the network, the larger the domain, the higher the level value Destination MAC Address Destination MAC address for sending the loopback message 802.1Q VLAN ID: [0-4095] 802.1Q VLAN used in VDSL PTM mode Set MD Level Save the Maintenance domain level. Send Loopback Send loopback message to destination MAC address. Send Linktrace Send traceroute message to destination MAC address.
124 7.3 Uptime Status This page shows System, DSL, ETH and Layer 3 uptime. If the DSL line, ETH or Layer 3 connection is down, the uptime will stop incrementing. If the service is restored, the counter will reset and start from 0. A Bridge interface will follow the DSL or ETH timer. The "ClearAll" button will restart the counters from 0 or show "Not Connected" if the interface is down.
125 Chapter 8 Management Click on the link to jump to a specific section: 8.1 Settings This includes 8.1.1 Backup Settings, 8.1.2 Update Settings, and 8.1.3 Restore Default screens. 8.1.1 Backup Settings To save the current configuration to a file on your PC, click Backup Settings. You will be prompted for backup file location. This file can later be used to recover settings on the Update Settings screen, as described below. 8.1.2 Update Settings This option recovers configuration files previously saved using Backup Settings. Enter the file name (including folder path) in the Settings File Name box, or press Browse… to search for the file, then click Update Settings to recover settings.
126 8.1.3 Restore Default Click Restore Default Settings to restore factory default settings. After Restore Default Settings is clicked, the following screen appears. Close the browser and wait for 2 minutes before reopening it. It may also be necessary, to reconfigure your PC IP configuration to match any new settings. NOTE: This entry has the same effect as the Reset button. The AR-5389 board hardware and the boot loader support the reset to default. If the Reset button is continuously pressed for more than 60 seconds, the boot loader will erase the configuration data saved in flash memory.
127 8.2 System Log This function allows a system log to be kept and viewed upon request. Follow the steps below to configure, enable, and view the system log. STEP 1: Click Configure System Log, as shown below (circled in Red). STEP 2: Select desired options and click Apply/Save. Consult the table below for detailed descriptions of each system log option. Option Description Log Indicates whether the system is currently recording events. The user can enable or disable event logging. By default, it is disabled. To enable it, select the Enable radio button and then click Apply/Save.
128 Option Description Log Level Allows you to configure the event level and filter out unwanted events below this level. The events ranging from the highest critical level “Emergency” down to this configured level will be recorded to the log buffer on the AR-5389 SDRAM. When the log buffer is full, the newer event will wrap up to the top of the log buffer and overwrite the old event. By default, the log level is “Debugging”, which is the lowest critical level. The log levels are defined as follows:  Emergency = system is unusable  Alert = action must be taken immediately  Critical = critical conditions  Error = Error conditions  Warning = normal but significant condition  Notice= normal but insignificant condition  Informational= provides information for reference  Debugging = debug-level messages Emergency is the most serious event level, whereas Debugging is the least important. For instance, if the log level is set to Debugging, all the events from the lowest Debugging level to the most critical level Emergency level will be recorded. If the log level is set to Error, only Error and the level above will be logged. Display Level Allows the user to select the logged events and displays on the View System Log window for events of this level and above to the highest Emergency level. Mode Allows you to specify whether events should be stored in the local memory, or be sent to a remote system log server, or both simultaneously. If remote mode is selected, view system log will not be able to display events saved in the remote system log server. When either Remote mode or Both mode is configured, the WEB UI will prompt the user to enter the Server IP address and Server UDP port. STEP 3: Click View System Log. The results are displayed as follows.
129 8.3 SNMP Agent Simple Network Management Protocol (SNMP) allows a management application to retrieve statistics and status from the SNMP agent in this device. Select the Enable radio button, configure options, and click Save/Apply to activate SNMP.
130 8.4 TR-069 Client WAN Management Protocol (TR-069) allows an Auto-Configuration Server (ACS) to perform auto-configuration, provision, collection, and diagnostics to this device. Select desired values and click Apply/Save to configure TR-069 client options. The table below is provided for ease of reference. Option Description Enable TR-069 Tick the checkbox  to enable. OUI-serial The serial number used to identify the CPE when making a connection to the ACS using the CPE WAN Management Protocol. Select MAC to use the router’s MAC address as serial number to authenticate with ACS or select serial number to use router’s serial number. Inform Disable/Enable TR-069 client on the CPE. Inform Interval The duration in seconds of the interval for which the CPE MUST attempt to connect with the ACS and call the Inform method.
131 Option Description ACS URL URL for the CPE to connect to the ACS using the CPE WAN Management Protocol. This parameter MUST be in the form of a valid HTTP or HTTPS URL. An HTTPS URL indicates that the ACS supports SSL. The “host” portion of this URL is used by the CPE for validating the certificate from the ACS when using certificate-based authentication. ACS User Name Username used to authenticate the CPE when making a connection to the ACS using the CPE WAN Management Protocol. This username is used only for HTTP-based authentication of the CPE. ACS Password Password used to authenticate the CPE when making a connection to the ACS using the CPE WAN Management Protocol. This password is used only for HTTP-based authentication of the CPE. WAN Interface used by TR-069 client Choose Any_WAN, LAN, Loopback or a configured connection. Connection Request Authorization Tick the checkbox  to enable. User Name Username used to authenticate an ACS making a Connection Request to the CPE. Password Password used to authenticate an ACS making a Connection Request to the CPE. URL IP address and port the ACS uses to connect to AR-5389. The Send Inform button forces the CPE to establish an immediate connection to the ACS.
132 8.5 Internet Time This option automatically synchronizes the router time with Internet timeservers. To enable time synchronization, tick the corresponding checkbox , choose your preferred time server(s), select the correct time zone offset, and click Save/Apply. NOTE: In addition, this menu item is not displayed when in Bridge mode since the router would not be able to connect to the NTP timeserver.
133 8.6 Access Control 8.6.1 Accounts/Passwords This screen is used to configure the user account access passwords for the device. Access to the AR-5389 is controlled through the following user accounts:  root - unrestricted access to change and view the configuration.  support - typically utilized by Carrier/ISP technicians for maintenance and diagnostics.  user - can view configuration settings & statistics and update firmware.  apuser - can configure wireless settings Use the fields below to change password settings and privileges. Click Save/Apply to continue.
134 NOTE: Passwords can be up to 16 characters in length.
135 8.6.2 Service Access The Services option limits or opens the access services over the LAN or WAN. These access services available are: FTP, HTTP, ICMP, SNMP, TELNET and TFTP. Enable a service by selecting its dropdown listbox. Click SAVE/APPLY to activate.
136 8.6.3 IP Address The IP Address Access Control mode, if enabled, permits access to local management services from IP addresses contained in the Access Control List. If the Access Control mode is disabled, the system will not validate IP addresses for incoming packets. The services are the system applications listed in the Service Control List beside ICMP. Click the Add button to display the following.
137 Configure the address and subnet of the management station permitted to access the local management services, and click Save/Apply. IP Address – IP address of the management station. Subnet Mask – Subnet address for the management station. Interface – Access permission for the specified address, allowing the address to access the local management service from none/lan/wan/lan&wan interfaces.
138 8.7 Update Software This option allows for firmware upgrades from a locally stored file. Configuration: Select for the three options available. STEP 1: Obtain an updated software image file from your ISP. STEP 2: Enter the path and filename of the firmware image file in the Software File Name field or click the Browse button to locate the image file. STEP 3: Click the Update Software button once to upload and install the file. NOTE: The update process will take about 2 minutes to complete. The device will reboot and the browser window will refresh to the default screen upon successful installation. It is recommended that you compare the Software Version on the Chapter 4 Device Information screen with the firmware version installed, to confirm the installation was successful.
139 8.8 Reboot To save the current configuration and reboot the router, click Save/Reboot. NOTE: You may need to close the browser window and wait for 2 minutes before reopening it. It may also be necessary, to reset your PC IP configuration.

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