Advantech EKI-6311GN User Manual Download

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EKI-6311GN-User_Manual V2.1

Page i

EKI-6311GN

IEEE 802.11 b/g/n Wireless
Access Point/Client Bridge

User Manual

Summary of Contents for EKI-6311GN

Page 1: ...EKI 6311GN User_Manual V2 1 Page i EKI 6311GN IEEE 802 11 b g n Wireless Access Point Client Bridge User Manual ...

Page 2: ...ated or transmitted in any form or by any means without the prior written permission of Advantech Co Ltd Information provided in this manual is intended to be accurate and reliable However Advantech Co Ltd assumes no responsibility for its use nor for any infringements of the rights of third parties which may result from its use Acknowledgements Intel and Pentium are trademarks of Intel Corporatio...

Page 3: ...o the cost of replacement materials service time and freight Please consult your dealer for more details If you think you have a defective product follow these steps 1 Collect all the information about the problem encountered For example CPU speed Advantech products used other hardware and software used etc Note anything abnormal and list any onscreen messages you get when the problem occurs 2 Cal...

Page 4: ... a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation F...

Page 5: ... cause damage 7 The openings on the enclosure are for air convection Protect the equipment from overheating DO NOT COVER THE OPENINGS 8 Make sure the voltage of the power source is correct before connecting the equipment to the power outlet 9 Position the power cord so that people cannot step on it Do not place anything over the power cord 10 All cautions and warnings on the equipment should be no...

Page 6: ...rom damage 1 To avoid electrical shock always disconnect the power from your PC chassis before you work on it Don t touch any components on the CPU card or other cards while the PC is on 2 Disconnect power before making any configuration changes The sudden rush of power as you connect a jumper or install a card may damage sensitive electronic components ...

Page 7: ...ALL SETTINGS 24 3 7 BASIC WIRELESS SETTINGS 26 3 8 SITE SURVEY 29 VAP PROFILE SETTINGS 29 VLAN TAB 31 CHAPTER 4 ADVANCED SETTINGS 33 4 1 ADVANCED WIRELESS SETTINGS 33 4 2 WIRELESS SECURITY SETTINGS 35 Data Encryption and Authentication Settings 35 Access Control 37 WDS Settings 38 CHAPTER 5 MANAGEMENT 40 REMOTE MANAGEMENT 40 5 1 SNMP MANAGEMENT 40 Configure SNMPv3 User Profile 41 COOVACHILLI SETTI...

Page 8: ...ATION LIST 54 VIEW NETWORK FLOW STATISTICS 55 VIEW ARP TABLE 56 VIEW BRIDGE TABLE 57 VIEW ACTIVE DHCP CLIENT TABLE 58 VIEW NETWORK ACTIVITIES 58 CHAPTER 7 TROUBLE SHOOTING 61 APPENDIX A ASCII 63 APPENDIX B SSH SETTINGS 64 APPENDIX C GPL DECLAMATION 71 ...

Page 9: ...EKI 6311GN User_Manual V2 1 Page 3 Overview CHAPTER ...

Page 10: ...d high reliability and high throughput data transmission To secure wireless connections EKI 6311GN encrypts data through 64 128 152 bit WEP data encryption and also supports WPA2 WPA 802 1x for powerful security authentication 1 2 Features Compliant with IEEE 802 11b g and IEEE 802 11n Support Power through Ethernet which is supplied with 12V IP55 waterproof certification Four operating modes incl...

Page 11: ...r 100V 240V Dimensions L x W x H 228 x 64 x 61 mm Weight 500g Interface Operation Modes Access Point AP Customer Premise Equipment CPE Antenna Antenna Configuration 1x1 1 Tx 1 Rx Default embedded 8dBi directional antenna Vertical Polarity Reserve N type Connector Plug Switchable by software Equipped N to RSMA adaptor and 5dBi dipole antenna for indoor AP application Other Features Telnet FTP SNMP ...

Page 12: ...s 802 11g Sensitivity 89dBm 6Mbps 73dBm 54Mbps 802 11n HT20 88dBm MCS0 70dBm MCS7 802 11n HT40 84dBm MCS0 67dBm MCS7 1 4 Packing List The product package you have received should contain the following items If any of them are not included or damaged please contact your local vendor for support EKI 6311GN 1 Pole Mounting Ring 1 Power Cord PoE Injector 1 Start up manual 1 User s manual CD 1 N to RSM...

Page 13: ...cessories Users MUST use the Power cord PoE Injector shipped in the box with the EKI 6311GN Use of other options will cause damage to the EKI 6311GN 1 5 Safety Precaution Attention IF DC voltage is supplied by other power injector please check the voltage and use a protection device on the power supply input Warning ...

Page 14: ...EKI 6311GN User_Manual V2 1 Page 8 Installation CHAPTER ...

Page 15: ...e safety precautions 2 If you are installing EKI 6311GN for the first time for your safety as well as others please seek assistance from a professional installer who has received safety training on the hazards involved 3 Keep safety as well as performance in mind when selecting your installation site especially where there are electric power and phone lines 4 When installing EKI 6311GN please note...

Page 16: ...ped in the box with the EKI 6311GN Use of other options will cause damage to the EKI 6311GN 3 Users MUST power off the EKI 6311GN first before connecting the external antenna to it Do not switch from built in antenna to the external antenna from WEB management without physically attaching the external antenna onto the EKI 6311GN otherwise damage might be caused to the EKI 6311GN itself 2 3 Hardwar...

Page 17: ... of the EKI 6311GN Figure 5 Seal the Bottom 4 Plug the power cord into the DC port of the PoE injector as the following right picture shows Figure 6 Connect to PoE Injector 5 Plug the other side of the Ethernet cable as shown in Step 3 into the PoE port of the PoE injector and get the complete set ready ...

Page 18: ...EKI 6311GN User_Manual V2 1 Page 12 Figure 7 Complete Set ...

Page 19: ... Note that you should unlock the pole mounting ring with a screw driver before putting it through EKI 6311GN as the following right picture shows Figure 8 Pole Mounting Step 1 2 Mount EKI 6311GN steadily to the pole by locking the pole mounting ring tightly Figure 9 Pole Mounting Step 2 3 Now you have completed the hardware installation of EKI 6311GN ...

Page 20: ...tenna please follow the steps below Grab the black rubber on the top of EKI 6311GN and slightly pull it up The metal N type connector will appear Figure 10 Move the Rubber Connect your antenna with the N type to RSMA adaptor on the top of EKI 6311GN The following picture shows the full set of EKI 6311GN Figure 11 Removed the Rubber Figure 12 Full set with antenna ...

Page 21: ...N type connector inappropriate force may damage the N type connector Users MUST power off the EKI 6311GN first before connecting the external antenna to it Do not switch from built in antenna to the external antenna from WEB management without physically attaching the external antenna onto the EKI 6311GN otherwise damage might be caused to the EKI 6311GN itself Warning Note ...

Page 22: ...EKI 6311GN User_Manual V2 1 Page 16 Basic Settings CHAPTER ...

Page 23: ...255 0 Gateway 0 0 0 0 Primary DNS Server 0 0 0 0 Secondary DNS Server 0 0 0 0 Spanning Tree Enable 802 11 Mode 802 11b g n Channel Number 6 SSID Wireless Broadcast SSID Enable HT Protect Disable Data Rate Auto Output Power Full Channel Mode 20MHz WMM Enabled RTS Threshold byte 2346 Fragmentation Length byte 2346 Beacon Interval 100 DTIM Interval 1 Space in Meter 0 Flow Control by AP Disable Securi...

Page 24: ...eb based Interface The EKI 6311GN provides you with user friendly Web based management tool Open Web browser and enter the IP address Default 192 168 1 1 of EKI 6311GN into the address field You will see the login page as below Figure 13 Login Page Enter the username Default admin and password Default password respectively and click Login to login the main page of EKI 6311GN As you can see this ma...

Page 25: ...case sensitive and the password should be no more than 19 characters 3 4 Basic System Settings For users who use the EKI 6311GN for the first time it is recommended that you begin configuration from Basic Settings in System shown below Figure 15 Basic System Settings Basic Settings Note ...

Page 26: ...n a network STP allows only one active path at a time between the access points but establish the redundant link as a backup if the initial link fails STP Forward Delay STP Forward Delay is the time spent in detecting and learning network tree topology state before entering the forward state Default time value is 1 sec GPS Coordinate Settings The GPS Coordinate Setting helps you mark the latitude ...

Page 27: ...nually Make sure the specified IP address is unique on your network in order to prevent IP conflict If the IEEE 802 11b g n Wireless Outdoor CPE is configured as Router mode you need to configure some additional TCP IP parameters for accessing the Internet IP Settings Router This is available only under Router mode Open IP Settings Router in System below to configure the parameters of EKI 6311GN f...

Page 28: ...s device through the wireless device connected with the CPE In wireless client mode users can access the CPE via its wired port for WAN is on wireless port and LAN is on wired port when device is set to Router mode Bridge mode and AP Repeater mode are similar to AP mode when device is set to Router mode WAN is on wired port and LAN is on wireless port Thus users must also connect the CPE with anot...

Page 29: ...e capabilities of authenticating authorizing accounting auditing alarming and etc It allows an organization to maintain user profiles in a central database that all remote servers can share Open RADIUS Settings in System to make RADIUS configuration Figure 39 RADIUS Settings Authentication RADIUS Server This is for RADIUS authentication It can communicate with RADIUS through IP Address Port and Sh...

Page 30: ...ing Port Forwarding as well as DMZ This is available only under Router Mode Source IP Filtering The source IP filtering gives users the ability to restrict certain types of data packets from your local network to Internet through EKI 6311GN Use of such filters can be helpful in securing or restricting your local network Figure 20 Source IP Filtering Destination IP Filtering The destination IP filt...

Page 31: ...rk to Internet through EKI 6311GN Use of such filters can be helpful in securing or restricting your local network Figure 22 Source Port Filtering Destination Port Filtering The destination port filtering enables you to restrict certain ports of data packets from your local network to Internet through EKI 6311GN Use of such filters can be helpful in securing or restricting your local network ...

Page 32: ...to automatically redirect common network services to a specific machine behind the NAT firewall These settings ne are only necessary if you wish to host some sort of server like a web server or mail server on the private local network behind EKI 6311GN s NAT firewall Figure 24 Port Forwarding 3 7 Basic Wireless Settings ...

Page 33: ...ity with other APs by keying in remote MAC address Please refer to the WDS Setting for detailed configuration AP Repeater The EKI 6311GN servers as AP and Bridge concurrently In other words the EKI 6311GN can provide connectivity services for CPEs under Bridge mode Wireless Network Name SSID This wireless network name is shared among all associated devices in your wireless network Keep it identica...

Page 34: ...nal transmission however if you prefer to use an external antenna for your case dependent applications you can switch from Internal 8 dBi to External N Type When External N Type is selected an Antenna Gain bar will appear to allow you specify the gain of the external antenna The antenna gain calculates the TX power back off needed to remain in compliance with regulations You are able to choose Ext...

Page 35: ...rform site survey through which information on the available access points will be detected Open Basic Settings in Wireless by clicking the Site Survey button beside Wireless Mode option the wireless site survey window will pop up with a list of available AP in the vicinity Select the AP you would like to connect and click Selected to establish connection Figure 26 Site Survey VAP Profile Settings...

Page 36: ...tings Basic Setting Profile Name Name of the VAP profile Wireless Network Name Enter the virtual SSID for the VAP Broadcast SSID In AP mode hiding network name is necessary when you are in a wireless environment that may have potential risk By disabling broadcast SSID the STA cannot scan and ...

Page 37: ...he Max Station Num the CPE will only allow up to 32 wireless clients to associate with for better bandwidth for each client By disabling the checkbox the CPE will allow up to 128 clients to connect but it is likely to cause network congestion or poor performance Security Setting To prevent unauthorized radios from accessing data transmitting over the connectivity the IEEE 802 11a n Wireless Outdoo...

Page 38: ...EKI 6311GN User_Manual V2 1 Page 32 Advanced Settings CHAPTER ...

Page 39: ...DU A MSDU aggregation it is not recommended to enable it Short GI Under 802 11n mode enable it to obtain better data rate if there is no negative compatibility issue RTS Threshold The EKI 6311GN sends RTS Request to Send frames to certain receiving station and negotiates the sending of a data frame After receiving an RTS that STA responds with a CTS Clear to Send frame to acknowledge the right to ...

Page 40: ...ooping the AP will listen to IGMP membership reports queries and leave messages to identify the ports that are members of multicast groups Multicast traffic will only be forwarded to ports identified as members of the specific multicast group or groups RIFS RIFS Reduced Interframe Spacing is a means of reducing overhead and thereby increasing network efficiency Link Integration Available under AP ...

Page 41: ...mit by checking Enable Traffic Shaping This is only available in Router mode We strongly recommend you leave most advanced settings at their defaults except Distance in Meters adjusted the parameter for real distance any modification on them may negatively impact the performance of your wireless network 4 2 Wireless Security Settings To prevent unauthorized radios from accessing data transmitting ...

Page 42: ...le in AP Wireless Client mode WPA WPA2 with RADIUS Available in AP mode it provides options of WPA TKIP or WPA2 AES for the client If it is selected the data encryption type must be TKIP AES and the RADIUS server must be set WPA PSK It is a simplified WPA mode with no need for specific authentication server In this so called WPA Pre Shared Key all you have to do is just pre enter a key in each WLA...

Page 43: ...less as below Figure 8 Access Control Access Control Mode If you select Allow Listed only those clients whose wireless MAC addresses are in the access control list will be able to connect to your AP While when Deny Listed is selected those wireless clients on the list will not be able to connect the AP MAC Address Enter the MAC address of the wireless client that you would like to list into the ac...

Page 44: ...d click Apply to save settings WDS Settings is available only under Bridge and AP Repeater Mode Bridge uses the WDS protocol that is not defined as the standard thus compatibility issues between equipment from different vendors may arise Moreover Tree or Star shape network topology should be used in all WDS use cases i e if AP2 and AP3 are specified as the WDS peers of AP1 AP2 should not be specif...

Page 45: ...EKI 6311GN User_Manual V2 1 Page 39 Management CHAPTER ...

Page 46: ...ure With Normal selected Telnet SNMP and FTP are activated as default remote management options To use secure management tools such as SSH HTTPS and WISE please select Secure You may also choose Customized to enable any methods as desired Figure 34 Remote Settings 5 1 SNMP Management The EKI 6311GN supports SNMP for convenient remote management Open SNMP Configuration in Management shown below Set...

Page 47: ...he management station By default it is set to public and allows all requests Set Community Specify the password for the incoming Set requests from the management station By default it is set to private Trap Destination Specify the IP address of the station to send the SNMP traps to Trap Community Specify the password sent with each trap to the manager By default it is set to public and allows all ...

Page 48: ...rrying this password are allowed to access the EKI 6311GN Confirm Password Input that password again to make sure it is your desired one Access Type Select Read Only or Read and Write accordingly Authentication Protocol Select an authentication algorithm SHA authentication is stronger than MD5 but is slower Privacy Protocol Specify the encryption method for SNMP communication None and DES are avai...

Page 49: ...he browser is redirected to a web page which may require authentication Captive portals are used at most Wi Fi hotspots Therefore to use Coovachilli you need to find Coovachilli service providers that have the additional services needed to make Coovahcilli work Figure 10 Coovachilli Settings Radius Settings Primary Radius Server Enter the name or IP address of the primary radius server Secondary R...

Page 50: ...n Password Enter the password of the Radius Administrator Captive Portal UAM Portal URL Enter the address of the UAM portal server UAM Secret Enter the secret password between the redirect URL and the Hotspot Upgrade Firmware Open Firmware Upload in Management and follow the steps below to upgrade firmware locally or remotely through EKI 6311GN s Web Figure 11 Upgrade Firmware Click Browse to sele...

Page 51: ...ay have an access to restore the important files by the backup All these can be done by the local or remote computer Open Configuration File in Management as below Figure 12 Backup Retrieve Settings Save Setting to File By clicking Save a dialog box will pop up Save it then the configuration file ap cfg will be generated and saved to your local computer Load Settings from File By clicking Browse a...

Page 52: ...re applied Figure 13 Restore Settings Restore factory default settings via Reset Button If software in EKI 6311GN is unexpectedly crashed and no longer reset the unit via Web you may do hardware reset via the reset button Press and hold the button for at least 5 seconds and then release it until the PWR LED gives a blink Reboot You can reboot your EKI 6311GN from Configuration File in Management a...

Page 53: ... 14 Reboot Password From Password Settings in Management you can change the password to manage your EKI 6311GN Enter the new password respectively in New Password and Confirm Password fields click Apply to save settings Figure 15 Password Note ...

Page 54: ... The Server can trust all certificates issued by a given CA To import a user certificate from Import User Certificates click Browse and specify the location where the user certificate is placed Click Import Figure 16 Certificate Settings Monitoring Tools System Log System log is used for recording events occurred on the EKI 6311GN including station connection disconnection system reboot and etc Op...

Page 55: ...l V2 1 Page 49 Figure 17 System Log Remote Syslog Server Enable Remote Syslog Enable System log to alert remote server IP Address Specify the IP address of the remote server Port Specify the port number of the remote server ...

Page 56: ...o scan all the APs within coverage Open Site Survey in Tools as below and select the desired AP to connect Figure 18 Site Survey Ping Watch Dog If you mess your connection up and cut off your ability the log in to the unit the ping watchdog has a chance to reboot due to loss of connectivity Figure 19 Ping Watchdog ...

Page 57: ...gure 20 Data Rate Test Antenna Alignment Under Bridge mode when the bridges are not easily visible from the location where the dish will be installed the antenna alignment tool can help you evaluate the position of the unit and adjust the angle of the antenna more precisely Keep it that in real circumstances a lot of additional factors should be taken into account when your unit is installed These...

Page 58: ...tor the current data transmission TX and data reception RX rate with the remote 802 11an Wireless Outdoor CPE Enter the IP address of the remote CPE type in the user name password and click Test The result will display in the bottom STATUS You may test single TX RX or bi direction Figure 22 Speed Test ...

Page 59: ...EKI 6311GN User_Manual V2 1 Page 53 Status CHAPTER ...

Page 60: ...rmation of EKI 6311GN which is read only Click Refresh at the bottom to have the real time information Figure 50 Basic Information 6 2 View Association List Open Association List in Connection from Status to check the information of associated wireless clients All is read only Click Refresh at the bottom to view the current association list ...

Page 61: ...details including device name connection time signal strength noise floor ACK timeout link quality IP information current data rate current TX RX packets View Network Flow Statistics Open Statistics in Status to check the data packets received on and transmitted from the wireless and Ethernet ports Click Refresh to view current statistics ...

Page 62: ...s Poll Interval Specify the refresh time interval in the box beside Poll Interval and click Set Interval to save settings Stop helps to stop the auto refresh of network flow statistics View ARP Table Open ARP Table in Status as below Click Refresh to view current table ...

Page 63: ...EKI 6311GN User_Manual V2 1 Page 57 Figure 24 ARP Table View Bridge Table Open Bridge Table in Status as below Click Refresh to view current connected status Figure 25 Bridge Table ...

Page 64: ...view current table Figure 26 DHCP Client Table View Network Activities The network activities allows you to monitor the current Wireless and Ethernet TX RX data traffic in graphical and numerical form on the Web of the Skyport The chart scale and throughput dimension Bps Kbps Mbps changes dynamically according to the mean throughput value Throughput statistics can be updated manually using the Ref...

Page 65: ...EKI 6311GN User_Manual V2 1 Page 59 Figure 27 Network Activities ...

Page 66: ...EKI 6311GN User_Manual V2 1 Page 60 Trouble Shooting CHAPTER ...

Page 67: ...lt settings in Configuration File from Management Q 3 What if I would like to backup and retrieve my configuration settings You may do the backup by generating a configuration file or retrieve the settings you have backed up previously in Configuration File from Management Q 4 What if I cannot access the Web based management interface Please check the followings Check whether the power supply is O...

Page 68: ...the AP is to get the best connection quality In addition you can start Site Survey in Wireless Basic Settings to check the signal strength If it is weak or unstable The smaller the number is the weaker the signal strength is please join other available AP for better connection ...

Page 69: ...Character Hex Equivalent ASCII Character Hex Equivalent ASCII Character Hex Equivalent ASCII Character Hex Equivalent 21 9 39 Q 51 i 69 22 3A R 52 j 6A 23 3B S 53 k 6B 24 3C T 54 l 6C 25 3D U 55 m 6D 26 3E V 56 n 6E 27 3F W 57 o 6F 28 40 X 58 p 70 29 A 41 Y 59 q 71 2A B 42 Z 5A r 72 2B C 43 5B s 73 2C D 44 5C t 74 2D E 45 5D u 75 2E F 46 5E v 76 2F G 47 _ 5F w 77 0 30 H 48 60 x 78 1 31 I 49 a 61 y...

Page 70: ...ata rate macclone mac clone enable clonedmac cloned mac address poepower secondary RJ45 power stp Spanning Tree stpForwardDelay STP forward delay gpslatitude gps latitude gpslongitude gps longitude ipset networkmode network mode select bridge or router bridge bridge mode ip settings iptype fixed dynamical ip dhcp client ipaddr ip address netmask subnet mask gateway gateway ip address dns1 dns1 dns...

Page 71: ...oe idle time lan lan ip settings ipaddr lan ip address netmask lan subnet mask dhcpserver enable dhcp server enable dhcpserveri pstart dhcp server ip start dhcpserveri pend dhcp server ip end dhcpserverl easetime dhcp server leasetime dhcprelaye nable dhcp relay enable dhcpserveri p dhcp server ip wlan wlan setting operationmode operation mode ssid wireless network name ssidhided wireless SSID bro...

Page 72: ...A MPDU A MPDU A MSDU A MSDU shortGI short GI RIFS rifs RTS RTS fragment fragment beacon beacon DTIM DTIM preamble preamble IGMP IGMP stdm stdm setting cpeType CPE Type authentication wireless authentication type encryption wireless data encryption key wireless wep key setting type wireless wep key type default wireless wep default key index 1 wireless wep key 1 2 wireless wep key 2 3 wireless wep ...

Page 73: ...list of associated wireless clients vapprofile 1 2 3 etc VAP setting active on off this vap profileName Name of profile ssid ssid of this vap ssidhided Broadcast SSID Enable or Disable vlanID vlanID of this vap Isolation wireless separation wmm WMM Support MaxStaNum Max Station Number StaNumLmt Whether manually limit the number o f station authentication wireless authentication type encryption wir...

Page 74: ...source port filter rule lists destportfilter destination port filter settings enable destination port filter enable addrule add a destination port filter rule delerule delete destination port filter rule rulelist show destination port filter rule lists portforward port forward settings enable port forward enable addrule add a port forward rule delerule delete port forward rule rulelist show port f...

Page 75: ...ng coovaChilliEnable Coovachilli Enable primaryRadiusServe r Primary RADIUS Server secondaryRadiusSer ver Secondary RADIUS Server radiusAuthPort RADIUS Authentication Port radiusAcctPort RADIUS Accounting Port radiusSharedSecret RADIUS Shared Secret radiusNasid RADIUS Nasid radiusAdminUserna me RADIUS Admin Username radiusAdminPasswo rd RADIUS Admin Password uamPortalUrl UAM Portal URL uamSecret U...

Page 76: ... delete delete a local ACL address list delete or display all local ACL address MacAddr add mac address to Current Access Control List statistics statistics Wireless Wireless LAN Ethernet Ethernet LAN log list syslog list password system password reset restore factory reboot reboot system exit logout from CLI ...

Page 77: ...er any of the following licenses or distribution models or licenses or distribution models similar to any of the following 1 GNU s General Public License GPL or Lesser Library GPL LGPL 2 the Artistic License e g PERL 3 the Mozilla Public License 4 the Netscape Public License 5 the Sun Community Source License SCSL 6 the Sun Industry Source License SISL and 7 the Apache Software license 2 Limited U...

Page 78: ...r Copyright c 2002 2006 Matt Johnston Portions copyright c 2004 Mihnea Stoenescu http matt ucc asn au dropbear dropbear 0 51 tar bz 2 GNU GENERAL PUBLIC LICENSE Version 2 http www gnu o rg licenses old licenses gpl 2 0 html hostapd Copyright c 2002 2006 Jouni Malinen jkmaline cc hut fi and contributors http host ap epitest fi releases hostapd 0 4 8 tar gz GNU GENERAL PUBLIC LICENSE Version 2 http ...

Page 79: ...ttp www gnu o rg licenses old licenses gpl 2 0 html http www gnu o rg licenses old licenses library h tml vsftpd Author Chris Evans ftp vsftpd beasts or g users ce vans vsftp d 1 1 2 tar gz GNU GENERAL PUBLIC LICENSE Version 2 http www gnu o rg licenses old licenses gpl 2 0 html linux ftp ftp ker nel org pu b linux ker nel v2 6 lin ux 2 6 20 3 tar bz2 GNU GENERAL PUBLIC LICENSE Version 2 http www ...

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