ZyXEL Communications ZyWALL USG FLEX 200 Manuals

Manuals and User Guides for ZyXEL Communications ZyWALL USG FLEX 200. We have 2 ZyXEL Communications ZyWALL USG FLEX 200 manuals available for free PDF download: Handbook, Reference Manual

ZyXEL Communications ZyWALL USG FLEX 200 Handbook (782 pages)

Security Firewalls

Brand: ZyXEL Communications | Category: Network Hardware | Size: 41.57 MB

Table of Contents
2
How to Configure Site-To-Site Ipsec VPN with Amazon VPC
20
Set up the Ipsec VPN Tunnel on the Amazon VPC
21
Set up the Ipsec VPN Tunnel on the Zywall/Usg
25
Test the Ipsec VPN Tunnel
31
What Could Go Wrong
32
How to Configure Site-To-Site Ipsec VPN with Microsoft (MS) Azure
33
Set up the Ipsec VPN Tunnel on the Zywall/Usg
34
Set up the Ipsec VPN Tunnel on the MS Azure
39
Test the Ipsec VPN Tunnel
46
What Could Go Wrong
49
How to Configure GRE over Ipsec VPN Tunnel
50
Set up the Zywall/Usg GRE over Ipsec VPN Tunnel of Corporate Network (HQ)
51
Set up the Zywall/Usg GRE over Ipsec VPN Tunnel of Corporate Network (Branch)
56
Test the GRE over Ipsec VPN Tunnel
60
What Could Go Wrong
61
How to Configure Site-To-Site Ipsec VPN Where the Peer Has a Static IP Address
63
(Branch)
68
Test the Ipsec VPN Tunnel
72
What Could Go Wrong
73
How to Configure Site-To-Site Ipsec VPN Where the Peer Has a Dynamic IP Address
75
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (HQ)
75
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (Branch Has a Dynamic IP Address)
79
Test the Ipsec VPN Tunnel
83
What Could Go Wrong
85
How to Configure Ipsec Site to Site VPN While One Site Is Behind a NAT Router
87
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (HQ)
87
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (Branch)
91
Set up the NAT Router (Using Zywall USG Device in this Example)
95
Test the Ipsec VPN Tunnel
97
What Could Go Wrong
98
How to Configure Hub-And-Spoke Ipsec VPN
99
Set up the Ipsec VPN Tunnel on the Zywall/Usg by Using VPN Concentrator Hub_Hq-To-Branch_A
100
Hub_Hq-To-Branch_B
104
Hub_Hq Concentrator
108
Spoke_Branch_A
109
Spoke_Branch_B
114
Test the Ipsec VPN Tunnel
119
What Could Go Wrong
123
Set up the Ipsec VPN Tunnel of Zywall/Usg Without Using VPN Concentrator Hub_Hq-To-Branch_A
125
Hub_Hq-To-Branch_B
128
Spoke_Branch_A
131
Spoke_Branch_B
134
Test the Ipsec VPN Tunnel
137
What Could Go Wrong
140
How to Use Dual-WAN to Perform Fail-Over on VPN Using the VPN Concentrator
142
Set up the Ipsec VPN Tunnel on the Zywall/Usg Hub_Hq-To
143
Branch_A
143
Hub_Hq-To-Branch_B
146
Hub_Hq Concentrator
149
Spoke_Branch_A
150
Spoke_Branch_B
153
Test the Ipsec VPN Tunnel
157
What Could Go Wrong
160
How to Configure Ipsec VPN with Zywall Ipsec VPN Client
161
Set up the Zywall/Usg Ipsec VPN Tunnel
162
Set up the Zywall Ipsec VPN Client
166
Test the Ipsec VPN Tunnel
169
What Can Go Wrong
171
How to Configure Site-To-Site Ipsec VPN with Fortigate
173
Set up the Ipsec VPN Tunnel on the Zywall/Usg
174
Set up the Ipsec VPN Tunnel on the Fortigate
177
Test the Ipsec VPN Tunnel
182
What Could Go Wrong
183
How to Configure Site-To-Site Ipsec VPN with Watchguard
185
Set up the Ipsec VPN Tunnel on the Zywall/Usg
186
Set up the Ipsec VPN Tunnel on the Watchguard
189
Test the Ipsec VPN Tunnel
195
What Could Go Wrong
196
How to Configure Site-To-Site Ipsec VPN with Cisco
198
Set up the Ipsec VPN Tunnel on the Zywall/Usg
199
Set up the Ipsec VPN Tunnel on the Cisco
204
Test the Ipsec VPN Tunnel
209
What Could Go Wrong
211
How to Configure Site-To-Site Ipsec VPN with a Sonicwall Router
212
Set up the Ipsec VPN Tunnel on the Zywall/Usg
213
Set up the Ipsec VPN Tunnel on the Sonicwall
220
Test the Ipsec VPN Tunnel
224
What Could Go Wrong
226
How to Configure Ipsec VPN Failover
229
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (HQ)
230
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (Branch)
233
Set up the WAN Trunk (Zywall/Usg_Hq)
238
Set up the Failover Command Line (Zywall/Usg HQ)
239
Test the Ipsec VPN Tunnel
240
What Could Go Wrong
242
How to Configure L2TP over Ipsec VPN While the Zywall/Usg Is Behind a NAT Router
244
Set up the L2TP VPN Tunnel on the Zywall/Usg_Hq
245
Set up the NAT Router (Using Zywall USG Device in this Example)
249
Test the L2TP over Ipsec VPN Tunnel
252
What Could Go Wrong
255
How to Configure L2TP VPN with Android 5.0 Mobile Devices
257
Set up the L2TP VPN Tunnel on the Zywall/Usg
258
Set up the L2TP VPN Tunnel on the Android Device
262
Test the L2TP over Ipsec VPN Tunnel
265
What Could Go Wrong
267
How to Configure L2TP VPN with Ios 8.4 Mobile Devices
269
Set up the L2TP VPN Tunnel on the Zywall/Usg
269
Set up the L2TP VPN Tunnel on the Ios Device
275
Test the L2TP over Ipsec VPN Tunnel
276
What Could Go Wrong
279
How to Import Zywall/Usg Certificate for L2TP over Ipsec in Windows 10
281
Set up the L2TP VPN Tunnel on the Zywall/Usg
281
10 Operating System
286
Set up the L2TP VPN Tunnel on the Windows 10
291
Test the L2TP over Ipsec VPN Tunnel
296
What Could Go Wrong
298
How to Import Zywall/Usg Certificate for L2TP over Ipsec in IOS Mobile Phone
300
Set up the L2TP VPN Tunnel on the Zywall/Usg
300
Export a Certificate from Zywall/Usg and Import It to Ios Mobile Phone
305
Set up the L2TP VPN Tunnel on the Ios Mobile Device
305
Test the L2TP over Ipsec VPN Tunnel
308
What Could Go Wrong
310
How to Import Zywall/Usg Certificate for L2TP over Ipsec in Android Mobile Phone
311
Set up the L2TP VPN Tunnel on the Zywall/Usg
312
Export a Certificate from Zywall/Usg and Import It to Android Mobile Phone
316
Set up the L2TP VPN Tunnel on the Android Mobile Device
317
Test the L2TP over Ipsec VPN Tunnel
320
What Could Go Wrong
322
System
324
Set up the L2TP VPN Tunnel on the Zywall/Usg
324
Capitan Operating System
329
Test the L2TP over Ipsec VPN Tunnel
332
What Could Go Wrong
334
How to Configure if I Want User Can Only See SSL VPN Login Button in Web Portal Login Page
336
Set up the DNS Service
337
Set up the Zywall/Usg SSL VPN Setting
337
Set up the Zywall/Usg System Setting
338
Test the SSL VPN
339
How to Deploy SSL VPN with Apple Mac os X 10.10 Operating System
343
Set up the SSL VPN Tunnel on the Zywall/Usg
344
System
347
Test the SSL VPN Tunnel
351
What Could Go Wrong
354
How to Configure SSL VPN for Remote Access Mobile Devices
356
Set up the SSL VPN Tunnel on the Zywall/Usg
357
Test the SSL VPN Tunnel
360
What Could Go Wrong
362
How to Configure an SSL VPN Tunnel (with Secuextender Version 4.0.0.1) on the Windows 10 Operating System
363
Set up the SSL VPN Tunnel with Windows 10
363
What Can Go Wrong
367
How to Redirect Multiple LAN Interface Traffic to the VPN Tunnel
369
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (HQ)
370
Set up the Zywall/Usg Ipsec VPN Tunnel of Corporate Network (Branch)
373
Set up the Policy Route (Zywall/Usg_Hq)
377
Set up the Policy Route (Zywall/Usg_Branch)
378
Test the Ipsec VPN Tunnel
380
What Could Go Wrong
381
How to Create VTI and Configure VPN Failover with VTI
383
VTI Deployment Flow
383
Set up the Zywall/Usg VTI of Corporate Network (HQ)
384
Set up the Zywall/Usg VTI of Corporate Network (Branch)
389
Test the Ipsec VPN Tunnel
395
What Can Go Wrong
397
How to Configure the USG When Using a Cloud Based SIP System
399
Set up the SIP ALG
400
Test Result
400
What Could Go Wrong
401
How to Block HTTPS Websites by Domain Filter Without Applying SSL Inspection
401
Set up the Content Filter on the Zywall/Usg
402
Set up the Security Policy on the Zywall/Usg
405
Set up the System Policy on the Zywall/Usg
405
Test the Result
405
How to Configure Content Filter 2.0 with Geo IP Blocking
408
Set up the Address Objet with Geo IP on the Zywall/Usg
409
Set up the Security Policy on the Zywall/Usg
409
Test the Result
410
What Could Go Wrong
411
How to Configure Content Filter 2.0 with Https Domain Filter
412
Application Scenario
412
Set up the Content Filter on the Zywall/Usg
413
Set up the Security Policy on the Zywall/Usg
415
Set up the System Policy on the Zywall/Usg
416
Test the Result
417
What Could Wrong
417
How to Block the Client Accessing to Certain Country Using Geo IP and Content Filter
418
Check Geo IP License Status on the Zywall/Usg
419
Set up the Address Objet with Geo IP on the Zywall/Usg
420
Set up the Security Policy on the Zywall/Usg
421
Test the Result
422
How to Restrict Web Portal Access from the Internet
425
Set up the Zywall/Usg System Setting
425
Test the Web Access
426
How to Setup and Configure Daily Report
429
Set up the Zywall/Usg Email Daily Report Setting
430
Test the Daily Log Report
431
What Could Go Wrong
433
How to Setup and Configure Email Logs
434
Set up the Zywall/Usg Email Logs Setting
435
Test the Email Log
436
What Could Go Wrong
437
How to Setup and Send Logs to a Syslog Server
438
Set up the Syslog Server (Use Papertrail Syslog in this Example)
438
Set up the Zywall/Usg Remote Server Setting
441
Test the Remote Server
442
What Could Go Wrong
443
How to Setup and Send Logs to a Vantage Reports Server
444
Set up the VRPT Server
445
Set up the Zywall/Usg Remote Server Setting
448
Test the Remote Server
449
What Could Go Wrong
449
How to Setup and Send Logs to the USB Storage
450
Set up the USB System Settings
451
Set up the USB Log Storage
452
Check the USG Log Files
453
How to Setup Ipv6 Interfaces for Pure Ipv6 Routing
454
Setting up the Ipv6 Interface
455
Set up the Prefix Delegation and Router Advertisement
457
Test
461
What Can Go Wrong
462
Test
464
How to Perform and Use the Packet Capture Feature on the Zywall/Usg
464
Set up the Packet Capture Feature
465
Check the Capture Files
468
How to Automatically Reboot the Zywall/Usg by Schedule
469
Set up the Shell Script
470
Set up the Schedule Run
471
Check the Reboot Status
473
How to Schedule Youtube Access
475
Set up the Schedule on the Zywall/Usg
475
Create the Application Objects on the Zywall/Usg
476
Set up SSL Inspection on the Zywall/Usg
476
Set up the Security Policy on the Zywall/Usg
477
Export Certificate from Zywall/Usg and Import It to Windows 7
478
Operation System
478
Test the Result
484
What Could Go Wrong
484
How to Continuously Run a Zysh Script
486
Set up the Shell Script
486
Set up the Schedule Run
488
Check the Result
488
How to Register Your Device and Services at Myzyxel.com
489
Account Creation
490
Device Registration
492
Service Registration (in the Case of Standard License)
493
Device Management (in the Case of Registering Bundled Licenses)
494
Refresh Service
495
What Could Go Wrong
495
How to Exempt Specific Users from Security Control
497
Set up the Security Policy on the Zywall/Usg for Employees
498
Set up the Security Policy on the Zywall/Usg for Executives
500
Test the Result
502
What Could Go Wrong
503
How to Detect and Prevent TCP Port Scanning with ADP
504
Set up the ADP Profile on the Zywall/Usg
505
Test the Result
508
What Could Go Wrong
509
How to Block Facebook
510
Set up the Content Filter on the Zywall/Usg
511
Set up the SSL Inspection on the Zywall/Usg
511
Set up the Security Policy on the Zywall/Usg
513
Export Certificate from Zywall/Usg and Import It to Windows 7
514
Operation System
514
Test the Result
519
What Could Go Wrong
520
How to Exempt Specific Users from a Blocked Website
521
Set up the Security Policy on the Zywall/Usg for Employees
522
Set up the Security Policy on the Zywall/Usg for Executives
524
Test the Result
527
What Could Go Wrong
528
How to Control Access to Google Drive
529
Set up the SSL Inspection on the Zywall/Usg
530
Set up the Security Policy on the Zywall/Usg
531
Export Certificate from Zywall/Usg and Import It to Windows 7
531
Operation System
532
Test the Result
537
What Could Go Wrong
538
How to Block HTTPS Websites Using Content Filtering and SSL Inspection
539
Set up the Content Filter on the Zywall/Usg
540
Set up SSL Inspection on the Zywall/Usg
541
Set up the Security Policy on the Zywall/Usg
543
Export Certificate from Zywall/Usg and Import It to Windows 7
544
Operation System
544
Test the Result
549
What Could Go Wrong
550
How to Block the Spotify Music Streaming Service
551
Set up IDP Profile on the Zywall/Usg
552
Test the Result
553
What Could Go Wrong
554
How Does Anti-Malware Work
555
Enable Anti-Malware Function to Protecting Your Traffic
556
Test the Result
557
Additional Configuration
557
What Can Go Wrong
558
Set up the Email Security on ATP Series
559
Test the Result
562
What Can Go Wrong
563
How to Configure Botnet Filter on ATP Series
564
Prerequisites before Setting up Botnet Filter Function
565
License Activation
565
Update Botnet Filter Signatures
565
Set up the IP Blocking on the ATP Series
567
Test the Result
567
Set up the URL Blocking on the ATP Series
568
Test the Result
568
How to Use Sandboxing to Detect Unknown Malware
570
Set up Sandboxing on ATP
571
Test the Result
573
What Can Go Wrong
576
How to Configure Bandwidth Management for FTP and HTTP Traffic
577
Set up the Bandwidth Management for FTP on the Zywall/Usg
578
Set up the Bandwidth Management for HTTP on the Zywall/Usg
579
Set up the Bandwidth Management Global Setting on the
581
Zywall/Usg
582
Test the Result
582
What Could Go Wrong
583
How to Limit Bittorrent or Other Peer-To-Peer Traffic
584
Set up the Application Patrol Profile on the Zywall/Usg
585
Set up the Bandwidth Management for Bittorrent on the
586
Zywall/Usg
586
Set up the Bandwidth Management Global Setting on the
588
Zywall/Usg
588
Test the Result
588
What Could Go Wrong
589
How to Configure a Trunk for WAN Load Balancing with a Static or Dynamic IP Address
590
Set up the Available Bandwidth on WAN1 Interfaces on the
591
Zywall/Usg
591
Set up the Available Bandwidth on WAN2 Interfaces on the
592
Zywall/Usg
592
Set up the WAN Trunk on the Zywall/Usg
592
Test the Result
593
What Could Go Wrong
594
How to Configure DNS Inbound Load Balancing to Balance DNS Queries Among Interfaces
595
Set up the DNS Inbound Load Balancing on the Zywall/Usg
596
Set up the NAT Rule on the Zywall/Usg
597
Test the Result
598
What Could Go Wrong
599
How to Manage Voice Traffic
600
Set up the SIP ALG on the Zywall/Usg
601
Set up the Bandwidth Management for SIP on the Zywall/Usg
601
Set up the Bandwidth Management for P2P on the Zywall/Usg
602
Set up the Bandwidth Management for FTP on the Zywall/Usg
603
Test the Result
605
What Could Go Wrong
606
How to Manage Zywall/Usg Configuration Files
607
Rename the Configuration Files from the Zywall/Usg
608
Download the Configuration Files on the Zywall/Usg
608
Copy the Configuration Files on the Zywall/Usg
609
Apply the Configuration Files on the Zywall/Usg
610
Upload the Configuration Files from the Zywall/Usg
611
What Could Go Wrong
611
How to Manage Zywall/Usg Firmware
612
Download the Current Firmware Version from Zyxel.com
613
Upload the Firmware on the Zywall/Usg
614
What Could Go Wrong
617
How to Get Started Using the Wizards
618
Set up the Internet Access (Ethernet) Wizard on the Zywall/Usg
618
Set up the Internet Access (Pppoe) Wizard on the Zywall/Usg
622
Set up the Internet Access (PPTP) Wizard on the Zywall/Usg
625
Set up the Wireless Settings Wizard on the Zywall/Usg
629
Set up the Device Registration on the Zywall/Usg
631
How to Configure the 3G/LTE Interface on the Zywall/Usg as a WAN Backup
633
Set up the 3G/LTE Interface on the Zywall/Usg
634
Set up the Trunk on the Zywall/Usg
635
Test the Result
636
What Could Go Wrong
637
How to Configure Two Different WAN Interfaces with Different IP Addresses in the same VLAN
638
Set up the Port Grouping on the Zywall/Usg
639
Set up the VLAN on the Zywall/Usg
639
Set up the Routing on the Zywall/Usg
641
Test the Result
641
What Could Go Wrong
642
How to Let a Server Use the same Public IP Address as the WAN Interface Using the Bridge Interface
642
Set up the Bridge Interface on the Zywall/Usg
643
Test the Result
645
What Could Go Wrong
646
How to Allow Public Access to a Server Behind Zywall/Usg
646
Set up the NAT on the Zywall/Usg
647
Set up the Security Policy on the Zywall/Usg
648
Test the Result
649
What Could Go Wrong
649
How to Set up a Wifi Network with Zyxel Aps
651
Set up the AP Management on the Zywall/Usg
652
Test the Result
654
What Could Go Wrong
655
How to Set up Guest Wifi Network Accounts
656
Set up the Wifi Guest Account, Address Range and Service Rule on the Zywall/Usg
657
Set up the Web Authentication on the Zywall/Usg
659
Set up the Security Policy on the Zywall/Usg
660
Test the Result
661
What Could Go Wrong
664
Guest Network
666
Set up Wi-Fi VLAN Interfaces
667
Test Result
677
What Could Go Wrong
679
How to Set up Wifi Networks with Microsoft Active Directory Authentication
681
Set up the Wi-Fi Guest Account and Authentication Method on the Zywall/Usg
682
Set up the Active Directory Server Account on the Zywall/Usg
683
Set up the Security Policy on the Zywall/Usg
684
Test the Result
685
What Could Go Wrong
687
How to Set up Ipv6 Interfaces for Pure Ipv6 Routing
688
Enable the Ipv6 on the Zywall/Usg
689
Set up the WAN Ipv6 Interface on the Zywall/Usg
690
Set up the LAN Ipv6 Interface on the Zywall/Usg
690
Test the Result
691
What Could Go Wrong
693
How to Set up an Ipv6 6To4 Tunnel
693
Set up the LAN Ipv6 Interface on the Zywall/Usg
694
Set up the 6To4 Tunnel on the Zywall/Usg
696
Test the Result
697
What Could Go Wrong
698
How to Set up an Ipv6-In-Ipv4 Tunnel
698
Set up the LAN Ipv6 Interface on the Zywall/Usg
699
Set up the 6To4 Tunnel on the Zywall/Usg
700
Set up the Policy Route on the Zywall/Usg
701
Test the Result
702
What Could Go Wrong
703
How to Update Firmware Automatically from a USB Storage
704
Automatic USB Firmware Upgrade Flow
704
Enable the USB Firmware Upgrade Function by CLI Command
705
Save the Firmware on the USB
705
Plug the USB into the Device
706
Firmware Version
706
Check Firmware Status
707
What Can Go Wrong
708
How to Configure DHCP Option 60 - Vendor Class Identifier
710
DHCP Option 60 Deployment Flow
711
Setting up DHCP Option 60 on the Web GUI
711
Setting up DHCP Option 60 on the CLI
712
Test DHCP Option 60
713
What Can Go Wrong
713
How to Configure Device HA Pro
714
Device HA Pro License
715
Behavior of the Device HA Pro
715
Device-HA Pro Setting Screen
715
Suggestions
717
How Do I Configure Device HA Pro in My Current Environment
718
What Can Go Wrong
722
How to Upgrade Firmware on HA Pro Synchronized Devices
723
Firmware Upgrade Flow
724
Running Firmware Version
724
Running Firmware Partition
724
Synchronization Status
725
Upload the Firmware to the Active Device
726
Test the Result
727
How to Downgrade Firmware on HA Pro Synchronized Devices
728
Firmware Downgrade Flow
729
Configuration File Backup
729
Switch Passive Device to Active Mode
729
Ethernet Cable and Heartbeat Port Disconnection
730
Firmware Downgrade on Device 1
730
Backup Configuration Apply
731
Connect All Ethernet Cables Back on Device 1
732
Firmware Downgrade on Device 2
732
Enable Device HA Pro on Device 2
733
Test the Result
733
Appendix. Edit the Configuration File
734
How to Replace One Defect Device of HA Pro
736
Scenario and Topology
736
Before Redeploy the HA-Pro Environment
737
After Received the New Device (Device 3)
738
Configuration on Device 1
739
Configuration on Device 3
739
Verification
741
How to Reboot the Active Device to the Standby Partition When Two Partitions Has Different Firmware Version
743
Change Partition Flow
744
Check Firmware Version on Active and Passive Devices
744
Reboot Passive Device(Device 1) by Standby Partition
745
Reboot Active Device(Device 1) by Standby Partition
745
Make Sure Passive Device(Device 1) Sync Process Successfully
746
Configuration Changed Scenario
746
How to Restore Configuration File in Device HA Mode
748
Configuration File Restore Flow
749
Unplug All Active Device Network Link (Device 1), Let Network Service
749
Runs on Passive Device
749
Upload Configuration File to Active Device (Device 1)
749
Apply Configuration File on Active Device (Device 1)
750
Connect All Network Cables on Device 1
751
Reset Passive Device to System Default
751
Deploy Device HA
751
Make Sure that Passive Device (Device 2) Sync Process Successfully
752
How to Check HA Pro Synchronization Status
753
Check the Sync Status on Web GUI
753
Check the Sync Status on Console
754
Check the Synchronization Status on Active Device
754
Check the Synchronization Status on Passive Device
755
Fail Cases
757
Exception Case
758
What Can Go Wrong
759
How to Setup Two-Factor Authentication for Admin Login
760
Setup SMTP Function on Your Device
760
Create Admin Type User on Device
761
Setup Two-Factor Authentication for Admin on Your Device
762
Test the Result
763
What Can Go Wrong
765
How to Configure Email Security for Phishing Mail
767
How It Works
767
Set up Phishing on ATP
768
Test the Result
769
What Can Go Wrong
769
How to Setup Email to SMS
771
Setup SMTP Function on Your Device
771
Setup Email to SMS Provider Configuration
772
Create Admin Type User on Device
773
Setup Two-Factor Authentication for Admin on Your Device
773
Test the Result
774
What Can Go Wrong
776
How to Use IP Reputation to Detect Threats
777
Activating Reputation Filter Service
778
Enabling IP Blocking on ATP
778
Selecting Specific Type of IP Addresses to Block
779
Adding IP Addresses to White List and Black List
779
Monitoring Statistics for IP Detection
780
Test the Result
780
What Can Go Wrong
782

ZyXEL Communications ZyWALL USG FLEX 200 Reference Manual (665 pages)

Brand: ZyXEL Communications | Category: Network Router | Size: 4.67 MB

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