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Netgear RAX36S User Manual - Page 40

Change the MTU size, admin, ADVANCED > Setup > WAN Setup, MTU Size, Apply

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4-Stream AX3000 WiFi 6 Router Model RAX36S If you suspect an MTU problem, a common solution is to change the MTU to 1400. If you are willing to experiment, you can gradually reduce the MTU from the maximum value of 1500 until the problem goes away. The following table describes common MTU sizes and applications. Table 2. Common MTU sizes MTU 1500 1492 1472 1468 1458 1436 Application The largest Ethernet packet size. This setting is typical for connections that do not use PPPoE or VPN and is the default value for NETGEAR routers, adapters, and switches. Used in PPPoE environments. Maximum size to use for pinging. (Larger packets are fragmented.) Used in some DHCP environments. Used in PPPoA environments. Used in PPTP environments or with VPN. Change the MTU size To change the MTU size: 1. Launch a web browser from a computer or mobile device that is connected to the router network. 2. Enter http://www.routerlogin.net. A login window opens. 3. Enter the router admin user name and password. The user name is admin. The password is the one that you specified the first time that you logged in. The user name and password are case-sensitive. The BASIC Home page displays. 4. Select ADVANCED > Setup > WAN Setup. The WAN Setup page displays. 5. In the MTU Size field, enter a value from 616 to 1500. 6. Click the Apply button. Your settings are saved. Specify Your Internet Settings 40 User Manual

Section	Page
Contents	3
1. Hardware Setup	8
Unpack your router	9
Top panel LEDs	10
Back panel	12
Router label	13
Position your router	13
Wall-mount your router	14
Cable your router	15
2. Connect to the Network and Access the Router	16
Connect to the router network	17
Connect to the router using a wired connection	17
Connect to the router WiFi network	17
Connect to the WiFi network using WPS	17
Types of logins	18
Use a web browser to access the router	18
Automatic Internet setup	18
Log in to the router	20
Install and manage your router with the Nighthawk app	20
Change the language	21
3. Specify Your Internet Settings	22
Use the Internet Setup Wizard	23
Manually set up the Internet connection	23
Specify an Internet connection without a login	23
Specify an Internet connection that uses a login	25
Specify IPv6 Internet connections	26
Requirements for entering IPv6 addresses	27
Use auto detect for an IPv6 Internet connection	27
Set up an IPv6 6to4 tunnel Internet connection	28
Set up an IPv6 pass-through Internet connection	30
Set up an IPv6 fixed Internet connection	31
Set up an IPv6 DHCP Internet connection	32
Set up an IPv6 PPPoE Internet connection	34
Use auto config for an IPv6 Internet connection	35
Set up an IPv6 6rd Internet connection	37
Manage the MTU size	39
MTU concepts	39
Change the MTU size	40
4. Control Access to the Internet	41
Network access control list	42
Enable the network access control list, set the access rule, and allow or block connected devices	42
Manage allowed devices currently not on the network	44
Manage blocked devices currently not on the network	46
Block Internet sites and services	48
Use keywords to block Internet sites	48
Delete keywords from the blocked list	49
Block services from the Internet	49
Prevent blocking on a trusted computer	51
Schedule when to block Internet sites and services	51
Set up security event email notifications	52
5. Manage Network Settings	54
View or change the WAN settings	55
Set up a default DMZ server	56
Change the router’s device name	57
Change the LAN TCP/IP settings	57
Specify the IP addresses that the router assigns	59
Disable the DHCP server feature in the router	60
Manage reserved LAN IP addresses	61
Reserve an IP address	61
Edit a reserved IP address	62
Delete a reserved IP address entry	62
Use the WPS Wizard for WiFi connections	63
Specify basic WiFi settings	64
Change the WiFi mode	65
Change the WiFi mode if AX WiFi is enabled	66
Change the WiFi mode if AX WiFi is disabled	67
Change the WiFi password or the WiFi security option	68
Set up WPA/WPA2 Enterprise WiFi security	70
Set up a guest WiFi network	71
Enable or disable the WiFi radios	73
Set up a WiFi schedule	74
Set up the router as a WiFi access point	75
Set up a bridge for a port group or VLAN tag group	76
Set up a bridge for a port group	76
Set up a bridge for a VLAN tag group	77
Set up an IPTV port	79
Manage custom static routes	80
Set up a static route	81
Edit a static route	82
Delete a static route	82
Enable or disable implicit beamforming	83
Enable or disable airtime fairness	84
Set up and manage Dynamic DNS	84
Set up a new Dynamic DNS account	85
Specify a DNS account that you already created	86
Change the Dynamic DNS settings	87
6. Optimize Performance	88
Use Dynamic QoS to optimize Internet traffic management	89
Enable Dynamic QoS	89
Enable or disable the automatic QoS database update	90
Manually update the dynamic QoS database	90
Improve network connections with Universal Plug and Play	91
Wi-Fi Multimedia Quality of Service	92
Enable or disable AX WiFi	93
7. Manage Your Router	95
Update the router firmware	96
Check for new firmware and update the router	96
Manually upload firmware to the router	97
Change the admin password	98
Enable admin password reset	98
Reset the admin password	99
Always use HTTPS to access the router	100
View information about the router and the Internet and WiFi settings	101
Display the statistics of the Internet port	101
Check the Internet connection status	103
View and manage logs of router activity	104
View devices currently on the network	105
Monitor Internet traffic	105
Manage the router configuration file	107
Back up the settings	107
Erase the settings	107
Restore the settings	108
Connect to your router with Anywhere Access	109
Turn off the router LEDs	109
Set the NTP server	110
Set your time zone	110
Return the router to its factory default settings	111
Use the Reset button	111
Erase the settings	112
8. Use OpenVPN to Access Your Network	113
About VPN connections	114
Enable OpenVPN service in the router	115
Install OpenVPN software on a VPN client	116
Install OpenVPN software on a Windows-based computer	116
Install OpenVPN software on a Mac computer	118
Install OpenVPN software on an iOS device	119
Install OpenVPN software on an Android device	120
LAN IP addressing in VPN networks	121
Use VPN to access your Internet service at home	121
Allow VPN client Internet access in the router	121
Block VPN client Internet access in the router	122
9. Manage Port Forwarding and Port Triggering	124
Manage port forwarding to a local server	125
Set up port forwarding to a local server	125
Add a custom port forwarding service	126
Edit a port forwarding service	127
Delete a port forwarding entry	128
Application example: Make a local web server public	128
How the router implements the port forwarding rule	129
Port triggering	129
Add a port triggering service	130
Enable port triggering	131
Application example: Port triggering for Internet relay chat	131
10. Troubleshooting	133
Quick tips	134
Sequence to restart your network	134
Check the power adapter and Ethernet cable connections	134
Check the WiFi settings	134
Check the network settings	134
Troubleshoot with the LEDs	135
Standard LED behavior when the router is powered on	135
Power LED is off	135
Power LED stays amber or the other LEDs don't turn on	135
Internet or Ethernet LAN port LEDs are off	136
WiFi LED is off	136
You cannot log in to the router	136
You cannot access the Internet	137
Troubleshoot Internet browsing	139
Changes are not saved	140
Troubleshoot WiFi connectivity	140
Troubleshoot your network using the ping utility	141
Test the LAN path to your router	141
Test the path from a Windows-based computer to a remote device	142
11. Supplemental Information	143
Factory settings	144