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[Gaix2]

I have had an A4 router for a few years now. It's been working fine up until my last trip out of town. I was away for 3 months, and I unplugged the router. Upon returning and booting everything up, the router would disconnect randomly (several times a day). I updated the firmware to 1.37NA and it seemed to solve the disconnection issue.

However, the internet connection is now behaving strangely on my wife's computer, and on my cell phone. It will load certain websites (eg google.com), and not others (eg yahoo.com). It will load only half of other websites (eg amazon.com). Skype works just fine. It doesn't matter if the computer is connected via wire or wireless. The behavior is consistent regardless of browser (tried firefox, IE, chrome). This is true for both my wife's computer as well as my phone. The same websites load, and the same websites stall for both devices.

Stranger yet, all websites and internet access appears to work fine on my computer.

I have tried loading doing a factory reset - same behavior. I have also tried loading different firmware versions - also same behavior.

Any idea how to fix this issue?

[FurryNutz]

Link>Welcome!

• Are you wired or wireless connected to the router?
• Has a Factory Reset been performed?
• Was a Factory Reset performed before and after any firmware updates?
• Was the router working before any firmware updates?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?
• Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values
• For DSL/PPPoE connections on the router, ensure that "Always ON" option is enabled.

Router and Wired Configurations
Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router.

• Turn off ALL QoS or Disable Traffic Shaping (DIR only) GameFuel (DGL only and if ON.) options, Advanced/QoS or Gamefuel.
• Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
• Enable Use Unicasting (compatibility for some ISP DHCP Servers) under Setup/Internet/Manual.
• Turn on DNS Relay under Setup/Networking. Link>Finding Faster DNS Addresses using Name Bench
• Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting.
• Ensure devices are set to auto obtain an IP address.
• Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall.
• Enable uPnP and Multi-cast Streaming under Advanced/Networking. Disable uPnP for testing Port Forwarding rules.
• Turn off WISH, and WPS under Advanced.
• WAN Port Speed set to Auto or specific speed? Some newer ISP modems support 1000Mb so manually setting to Gb speeds can be supported by the router. Advanced/Advanced Networking/WAN Port Speed
• Set current Time Zone, Date and Time. Use an NTP Server feature. Tools/Time.
• Check cable between Modem and Router, swap out to be sure. Link> Cat6 is recommended.

Wireless Configurations
Links>Wireless Installation Considerations and Managing Signal Congestion

• Ensure the default (dlink) SSID name is changed. Can be anything and not something thats already in use by any neighboring WiFi routers. Under Setup/Wireless/Manual.
• What wireless modes are you using?
• 2.4Ghz Routers only: Try single mode G or N or mixed G and N?
• Channel Width set for Auto 20/40Mhz or try 20Mhz only.
• Try setting a manual Channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear.
• What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only. Some WiFi adapters don't support AES, so you might want to try TPIK only or Auto TPIK and AES.
• What wireless devices do you have connected?
• Any cordless house phones?
• Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?
• If you have any of these options, Try turning OFF or ON Short GI, WLAN Partition, HT 20/40 Co-exhistance and Extra Wireless Protection if you have it. Recommended settings are default. Under Advanced/Advanced Wireless.
• Enable WMM Enable Under Advanced/Advanced Wireless.

You may have had some new WiFi neighbors move in as well.

3rd Party Security Software Configurations

• Turn off all anti virus and firewall programs on PC while testing. 3rd party firewalls are not generally needed when using routers as they are effective on blocking malicious inbound traffic.
• Turn off all devices accept for one wired PC while testing.

[Gaix2]

Link>Welcome!

• Are you wired or wireless connected to the router?

         wired

• Has a Factory Reset been performed?

          yes

• Was a Factory Reset performed before and after any firmware updates?

          both

• Was the router working before any firmware updates?

          yes, but had frequent disconnection issues.
Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?

          OCN Open Computer Network - Fiber Optic

• What ISP Modem Mfr. and model # do you have?

          It doesn't really say anything other than GE-PON

• Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. Link>Checking MTU Values

          Currently set to 1492

• For DSL/PPPoE connections on the router, ensure that "Always ON" option is enabled.

          Always On is enabled

I have tried all the configurations listed under the wired section. The behavior is still the same. I also noticed that under DHCP clients, my computer is listed as "never expire" while all other connected devices have a 23hr + expiration.

[FurryNutz]

• If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems: Link>Double NAT and How NAT Works. To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged. If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ.

What happens if you set the MTU to 1500 as a test?

Ensure the LAN and Wireless adapter drivers are up to date on the one Windows PC. I presume the PC is also wired or wireless? We presume that if your PC is working well with out issue, there could be a problem with the other PC.

The reason of the DHCP clients are reporting never expire and 23hr is that your PC is reserved ON the router and the others are not. It's recommended to reserve all IP addresses for all devices ON the router.

What wireless modes are you using currently?

[Gaix2]

• If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems: Link>Double NAT and How NAT Works. To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged. If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ.

I don't believe the modem has a built in router. When we initially purchased the service, the ISP provide both the modem and a separate router (which we have since upgraded to the DIR-655).

What happens if you set the MTU to 1500 as a test?

Router says invalid MTU size. Valid MTU range 128 to 1492.

Ensure the LAN and Wireless adapter drivers are up to date on the one Windows PC. I presume the PC is also wired or wireless? We presume that if your PC is working well with out issue, there could be a problem with the other PC.

Yes the adapters are up to date. I have turned off the wireless adapter on my wife's computer. It is connected via wire only. FWIW, my cell phone (HTC new One; Android 4.2.2 Jellybean, chrome browser) has trouble with the same websites.

The reason of the DHCP clients are reporting never expire and 23hr is that your PC is reserved ON the router and the others are not. It's recommended to reserve all IP addresses for all devices ON the router.

Ok, I have reserved all IP addresses for all devices. Behavior has not changed. Is there a reason why my computer was automatically set to reserve while the other devices had to be changed manually?

What wireless modes are you using currently?

Mixed mode N, G, B.

[FurryNutz]

• If this modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems: Link>Double NAT and How NAT Works. To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged. If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ.

I don't believe the modem has a built in router. When we initially purchased the service, the ISP provide both the modem and a separate router (which we have since upgraded to the DIR-655).
What was this other model router they gave you?

What happens if you set the MTU to 1500 as a test?

Router says invalid MTU size. Valid MTU range 128 to 1492. There should be a 1500 value available unless some how the router limited for this Rev A model. Can you call and ask your ISP what they support in the MTU value to be sure? This could be an issue maybe.

Ensure the LAN and Wireless adapter drivers are up to date on the one Windows PC. I presume the PC is also wired or wireless? We presume that if your PC is working well with out issue, there could be a problem with the other PC.

Yes the adapters are up to date. I have turned off the wireless adapter on my wife's computer. It is connected via wire only. FWIW, my cell phone (HTC new One; Android 4.2.2 Jellybean) has trouble with the same websites.

The reason of the DHCP clients are reporting never expire and 23hr is that your PC is reserved ON the router and the others are not. It's recommended to reserve all IP addresses for all devices ON the router.

Ok, I have reserved all IP addresses for all devices. Behavior has not changed.

What wireless modes are you using currently?

Mixed mode N, G, B.
Lets test Mixed G and N modes, WPA2 and TPIK only and Auto 20/40Mhz.

• Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?

[FurryNutz]

FYI, I am showing that Rev As are supporting of MTU values of 1500:
http://support.dlink.com/emulators/dir655/133NA/WAN.html

[Gaix2]

I don't believe the modem has a built in router. When we initially purchased the service, the ISP provide both the modem and a separate router (which we have since upgraded to the DIR-655).
What was this other model router they gave you?
I forgot, and no longer have it.. It was a D-Link router that only supported 100Mbs. The service we purchased offers 200Mbps.

What happens if you set the MTU to 1500 as a test?

Router says invalid MTU size. Valid MTU range 128 to 1492. There should be a 1500 value available unless some how the router limited for this Rev A model. Can you call and ask your ISP what they support in the MTU value to be sure? This could be an issue maybe.
The ISP support office is currently closed. I will call when they are open. Would MTU value affect one computer, but not another? Also, I have been using this router/ISP for a few years now. Never had a problem until my recent 3 month power off.


The reason of the DHCP clients are reporting never expire and 23hr is that your PC is reserved ON the router and the others are not. It's recommended to reserve all IP addresses for all devices ON the router.

Ok, I have reserved all IP addresses for all devices. Behavior has not changed.
Is there a reason my computer is automatically set to reserve while the others are need to be set manually?

What wireless modes are you using currently?

Mixed mode N, G, B.
Lets test Mixed G and N modes, WPA2 and TPIK only and Auto 20/40Mhz.

I have set the router to these configurations. Does it matter? My wife's computer is only connected via wire now. I have turned off the wireless adapter.

• Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?

Using InSSIDer, I see 4 green signals including my own.

[Gaix2]

FYI, I am showing that Rev As are supporting of MTU values of 1500:
http://support.dlink.com/emulators/dir655/133NA/WAN.html

[Gaix2]

FYI, I am showing that Rev As are supporting of MTU values of 1500:
http://support.dlink.com/emulators/dir655/133NA/WAN.html

I noticed 1.32NA in the emulator. Should I try loading that firmware version?

[FurryNutz]

I don't believe the modem has a built in router. When we initially purchased the service, the ISP provide both the modem and a separate router (which we have since upgraded to the DIR-655).
What was this other model router they gave you?
I forgot, and no longer have it.. It was a D-Link router that only supported 100Mbs. The service we purchased offers 200Mbps.

What happens if you set the MTU to 1500 as a test?

Router says invalid MTU size. Valid MTU range 128 to 1492. There should be a 1500 value available unless some how the router limited for this Rev A model. Can you call and ask your ISP what they support in the MTU value to be sure? This could be an issue maybe.
The ISP support office is currently closed. I will call when they are open. Would MTU value affect one computer, but not another? Also, I have been using this router/ISP for a few years now. Never had a problem until my recent 3 month power off.
This could only mean that before the 3 month time frame, it was working then after, something with the ISP service, configuration or addition of other devices has changed.

The reason of the DHCP clients are reporting never expire and 23hr is that your PC is reserved ON the router and the others are not. It's recommended to reserve all IP addresses for all devices ON the router.

Ok, I have reserved all IP addresses for all devices. Behavior has not changed.
Is there a reason my computer is automatically set to reserve while the others are need to be set manually?
Reserved IP addresses are not automatic. They have to be manually configured ON the router. You are setting the reservation ON the router and NOT on the devices right? Devices should be set to Automatic or Auto Obtain IP addressing to be sure. If you are manually setting IP addresses ON the devices this is called Static IP addressing. This is not preferred for using routers that are designed to do this ON the router.

What wireless modes are you using currently?

Mixed mode N, G, B.
Lets test Mixed G and N modes, WPA2 and TPIK only and Auto 20/40Mhz.

I have set the router to these configurations. Does it matter? My wife's computer is only connected via wire now. I have turned off the wireless adapter.
Anything could be effecting however since you have switched to wired on the Wifes PC, it shouldnt' be any problem. You could test with the WiFi turned OFF on the router and test to see if the wired PCs exhibit the same thing.

• Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?

Using InSSIDer, I see 4 green signals including my own.
Ensure that the channel set on the 655 isn't on one being used, hopefully 1, 6 or 11 is preferred.

• Also  check cable between Modem and Router and PCs, swap out to be sure. Link> Cat6 is recommended. Swap out your cable to your Wifes PC and test.

I would manually input your ISPs DNS addresses as well under Setup/Internet/Manual/Connection Type for your PPPoE account and see if this does anything.

Ok on the MTU value, this maybe a default limit when using PPPoE as a connection type. No need to downgrade FW. Lets find out what the ISP supports first.

Maybe someone can review your router settings with you using Link> teamviewer if your interested. Its safe and secure.

[Gaix2]

What happens if you set the MTU to 1500 as a test?

Router says invalid MTU size. Valid MTU range 128 to 1492. There should be a 1500 value available unless some how the router limited for this Rev A model. Can you call and ask your ISP what they support in the MTU value to be sure? This could be an issue maybe.
The ISP support office is currently closed. I will call when they are open. Would MTU value affect one computer, but not another? Also, I have been using this router/ISP for a few years now. Never had a problem until my recent 3 month power off.
This could only mean that before the 3 month time frame, it was working then after, something with the ISP service, configuration or addition of other devices has changed.
When I came back, I had frequent disconnection issues. The only change at this time was the addition of my phone to the network. I have now updated the router firmware, and performed a factory reset, so all configuration has changed as well. Sadly, this doesn't narrow anything down for us.

******************************************


The reason of the DHCP clients are reporting never expire and 23hr is that your PC is reserved ON the router and the others are not. It's recommended to reserve all IP addresses for all devices ON the router.

Ok, I have reserved all IP addresses for all devices. Behavior has not changed.
Is there a reason my computer is automatically set to reserve while the others are need to be set manually?
Reserved IP addresses are not automatic. They have to be manually configured ON the router. You are setting the reservation ON the router and NOT on the devices right? Devices should be set to Automatic or Auto Obtain IP addressing to be sure. If you are manually setting IP addresses ON the devices this is called Static IP addressing. This is not preferred for using routers that are designed to do this ON the router.
That is correct, all devices are set to Auto obtain IP.


******************************************

What wireless modes are you using currently?

Mixed mode N, G, B.
Lets test Mixed G and N modes, WPA2 and TPIK only and Auto 20/40Mhz.

I have set the router to these configurations. Does it matter? My wife's computer is only connected via wire now. I have turned off the wireless adapter.
Anything could be effecting however since you have switched to wired on the Wifes PC, it shouldnt' be any problem. You could test with the WiFi turned OFF on the router and test to see if the wired PCs exhibit the same thing.
I will turn off the Router WiFi for now.

• Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?

Using InSSIDer, I see 4 green signals including my own.
Ensure that the channel set on the 655 isn't on one being used, hopefully 1, 6 or 11 is preferred.

I have turned off the Router WiFi. I will test WiFi after I get the wired connection working.

******************************************

• Also  check cable between Modem and Router and PCs, swap out to be sure. Link> Cat6 is recommended. Swap out your cable to your Wifes PC and test.

I do not have any CAT6 cables right now, only CAT5e. I should note, both computers are connected to a D-Link DGS 2208 switch, which is then connected to the router. I have swapped cables - same behavior.


******************************************

I would manually input your ISPs DNS addresses as well under Setup/Internet/Manual/Connection Type for your PPPoE account and see if this does anything.

I don't know the ISP's DNS address. I will have to call when the support office opens. In the mean time, it is obtained automatically, and set to: 61.207.11.153


******************************************


Ok on the MTU value, this maybe a default limit when using PPPoE as a connection type. No need to downgrade FW. Lets find out what the ISP supports first.

Maybe someone can review your router settings with you using Link> teamviewer if your interested. Its safe and secure.
[/quote]

[FurryNutz]

What happens if you set the MTU to 1500 as a test?

Router says invalid MTU size. Valid MTU range 128 to 1492. There should be a 1500 value available unless some how the router limited for this Rev A model. Can you call and ask your ISP what they support in the MTU value to be sure? This could be an issue maybe.
The ISP support office is currently closed. I will call when they are open. Would MTU value affect one computer, but not another? Also, I have been using this router/ISP for a few years now. Never had a problem until my recent 3 month power off.
This could only mean that before the 3 month time frame, it was working then after, something with the ISP service, configuration or addition of other devices has changed.
When I came back, I had frequent disconnection issues. The only change at this time was the addition of my phone to the network. I have now updated the router firmware, and performed a factory reset, so all configuration has changed as well. Sadly, this doesn't narrow anything down for us.

******************************************


The reason of the DHCP clients are reporting never expire and 23hr is that your PC is reserved ON the router and the others are not. It's recommended to reserve all IP addresses for all devices ON the router.

Ok, I have reserved all IP addresses for all devices. Behavior has not changed.
Is there a reason my computer is automatically set to reserve while the others are need to be set manually?
Reserved IP addresses are not automatic. They have to be manually configured ON the router. You are setting the reservation ON the router and NOT on the devices right? Devices should be set to Automatic or Auto Obtain IP addressing to be sure. If you are manually setting IP addresses ON the devices this is called Static IP addressing. This is not preferred for using routers that are designed to do this ON the router.
That is correct, all devices are set to Auto obtain IP.


******************************************

What wireless modes are you using currently?

Mixed mode N, G, B.
Lets test Mixed G and N modes, WPA2 and TPIK only and Auto 20/40Mhz.

I have set the router to these configurations. Does it matter? My wife's computer is only connected via wire now. I have turned off the wireless adapter.
Anything could be effecting however since you have switched to wired on the Wifes PC, it shouldnt' be any problem. You could test with the WiFi turned OFF on the router and test to see if the wired PCs exhibit the same thing.
I will turn off the Router WiFi for now.

• Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many?

Using InSSIDer, I see 4 green signals including my own.
Ensure that the channel set on the 655 isn't on one being used, hopefully 1, 6 or 11 is preferred.

I have turned off the Router WiFi. I will test WiFi after I get the wired connection working.

******************************************

• Also  check cable between Modem and Router and PCs, swap out to be sure. Link> Cat6 is recommended. Swap out your cable to your Wifes PC and test.

I do not have any CAT6 cables right now, only CAT5e. I should note, both computers are connected to a D-Link DGS 2208 switch, which is then connected to the router. I have swapped cables - same behavior.
I would remove the DGS switch while testing to be sure that you can help narrow down the issue. Then, if we can help you figure it out, re-install the switch.

******************************************

I would manually input your ISPs DNS addresses as well under Setup/Internet/Manual/Connection Type for your PPPoE account and see if this does anything.

I don't know the ISP's DNS address. I will have to call when the support office opens. In the mean time, it is obtained automatically, and set to: 61.207.11.153
I presume there should be a 2ndary DNS address as well. There should be two DNS addresses. Possible only one could be a cause. One thing you could try is this:

• Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
• Enable Use Unicasting (compatibility for some ISP DHCP Servers) under Setup/Internet/Manual.

Turn OFF DNS Relay under Setup/Networking after you try this> Link>Finding Faster DNS Addresses using Name Bench

******************************************


Ok on the MTU value, this maybe a default limit when using PPPoE as a connection type. No need to downgrade FW. Lets find out what the ISP supports first.

Maybe someone can review your router settings with you using Link> teamviewer if your interested. Its safe and secure.

[Gaix2]

******************************************

• Also  check cable between Modem and Router and PCs, swap out to be sure. Link> Cat6 is recommended. Swap out your cable to your Wifes PC and test.

I do not have any CAT6 cables right now, only CAT5e. I should note, both computers are connected to a D-Link DGS 2208 switch, which is then connected to the router. I have swapped cables - same behavior.
I would remove the DGS switch while testing to be sure that you can help narrow down the issue. Then, if we can help you figure it out, re-install the switch.

I have connected my wife's computer directly to the router. It continues to exhibit the same behavior - some websites load, others don't.


******************************************

I would manually input your ISPs DNS addresses as well under Setup/Internet/Manual/Connection Type for your PPPoE account and see if this does anything.

I don't know the ISP's DNS address. I will have to call when the support office opens. In the mean time, it is obtained automatically, and set to: 61.207.11.153
I presume there should be a 2ndary DNS address as well. There should be two DNS addresses. Possible only one could be a cause. One thing you could try is this:

• Turn off Advanced DNS Services if you have this option under Setup/Internet/Manual or under Setup/PARENTAL CONTROL/Set to>None: Static IP or Obtain Automatically From ISP.
• Enable Use Unicasting (compatibility for some ISP DHCP Servers) under Setup/Internet/Manual.

Turn OFF DNS Relay under Setup/Networking after you try this> Link>Finding Faster DNS Addresses using Name Bench

Primary DNS: 61.207.11.153
Secondary DNS: 221.113.139.137

After reading the link, I'd prefer not to have to find my own DNS. If server IP should change, I will have to look up the IP again. I don't want to have to walk my wife through the process if this should occur while I'm out of town.

In the mean time, Advanced DNS service is turned off, and DNS Relay has been disabled.


******************************************

Maybe someone can review your router settings with you using Link> teamviewer if your interested. Its safe and secure.

I have installed teamviewer.

[FurryNutz]

Let me now of a time frame. I'm headed home from work now. Later this evening maybe. PM me the ID and PW info and We'll have a look. Seems strange that your PC is working and not your Wifes.