Motorola SB6120 - Port 888 Redirect To Cable Modem?
Sep 18, 2011
I was working with Motorola SB6120 cable modem regarding an odd power cycle issue (it would power cycle randomly for 24 hours). While trying to diag the issue, I was taking a peak in his router config and found a port set to forward as:
Application: Comcast
Port From: 888
Protocol: Both
IP: 192.168.100.1
Port To: 80
I understand that his modem admin page is now available from the internet. He said his friend set this up to "modem", but I don't see any advantage of having this done. At this point what are the other advantages of forwarding such ports?Another key note: When the port forwarding was disabled, suddenly the power cycle issues stopped.
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Sep 3, 2011
I just got a Motorola SB6120 SURFboard DOCSIS 3.0 eXtreme Broadband Cable Modem and the box didn't came with the Ethernet cable inside to connected to my router .Now... I been reading in some places that it came with a (Patch cable) and in the User guide it says ( Ethernet cable) and then I found out that it says ( Interfaces 1 x Modem - F connector,1 x Network - Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45 ) So ... I found that, that kind of Ethernet cable it's a "crossover cable" So...I'm a bit confused here now .I read that this kind of cable it's a "Cat 5e(nhanced) cable" ; But ......it's not as fast as a Cat 6 cable.
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Jun 22, 2011
I can't get my PC to connect to my broadband. I am running windows 7 64 bit and use the following:
Motorola Surfboard SB6120 modem;
NetGear WGR614 wireless router
I am able to connect with other devices (iPhone, Roku) to my wireless through the wireless router. My computer recognizes the broadband connection, but it won't connect to it. I get two errors when I try to connect:651: the modem has reported an error, and 638: the remote server is not responding in a timely fashion.I have tried connecting the ethernet cable directly to the modem, but I get the same results.Also, I have tried to cycle down the computer, router, then modem and turn them back on in reverse with no change in results.The connection worked until I clicked "disable connection" one day when I had trouble connecting (high traffic i think). Since then, the"home group" I set up originally with the connection wizard disappeared, and it had not been able to connect since then. When I try to connect I click on a small icon in the lower right that says, "not connected, connection available", then I click on the button to connect to broadband and get the errors described above.
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Oct 19, 2011
So I just noticed on my Cable modem the link light is blinking orange, per Motorola if its blinking orange - Computer is connected via a 10 mbps or 100 mbps Ethernet port.
On the Linksys E4200 status page it says
Internet Port Speed:
Internet 10/100 mbps
Local Port Speed Port 1 - 1Gbps
Maybe I just noticed this with this router, but I'm pretty sure this didn't start happening until I updated to 1.0.03.
Previously the link light was blue indicating a 1Gbps connection.
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Feb 13, 2012
I've been trying to connect my D-Link DIR-601 router with a Motorola SBG901 cable modem. The modem itself has a built-in WIFI (G) and one ethernet port, but not good enough for my purposes. I need more wired connections and an (N) WIFI connection, which the D-Link could provide, if I could get it to work. I just cannot get the two pieces of equipment to talk to each other. I can set up 2 independent LAN's, but no WAN (internet connection) from either. D-Link has provided pages of instrutions, but nothing works.
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Jan 6, 2012
Would this work ?. also, on the back of the modem is a rectangular, not the typical, usb slot. I cannot move the modem because it is connected to the wall. I don't want to use an extra long wire either. What do I need to buy so I can use the wired modem, as a wireless one on my pc downstairs ?
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Jan 11, 2013
I am looking for a router or something else that still allows me to connect my phone line to my router or computer so people in the house can make calls. My cable modem is a Motorola SBV5120 I had it for eight years now and I am thinking of switching our network to wireless so I don't get those cluttered wires.
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Mar 19, 2012
Trying to figure out if I have a bad modem or bad wiring leading to the modem.I'm losing connectivity usually in the evening when I'm sure everything is more loaded.he reason I'm concerned about the modem is that when I lose connectivity, I can't access the modem through my browser. It won't respond. This isn't just for a moment. I'll unplug the modem and plug it back in. I can access the modem after that with my browser, but more often than not, I don't regain connectivity. It keeps trying and failiing.its a Motorola SB5100 from 10 years ago. how to seperate bad wiring from a bad modem?
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Apr 22, 2012
I have a 192.168.1.xxx network connected to Verizon FIOS via Actiontec MOCA / router. I also have a 192.168.15.xxx network connected to Comcast via Motorola VT2442 router (used for Vonage) and a Motorola SB6121 cable modem.
Each network has it's own gigabit switch connected to each router. The two networks are physically separated but switches and routers are physically side by side.
What is the best configuration to allow devices on 192.168.1.xxx network to communicate with devices on the 192.168.15.xxx network (share printers, NAS, etc), but still have each network served by it's respective ISP, and each device still get it's dhcp, dns, gateway, etc from each respective router?
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Nov 7, 2012
Today I purchased a Motorola SURFboard extreme Cable Modem DOCSIS 3.0 in order to replace my old modem which is out of date and has been very slow as of late. I connected the coaxial cable, Ethernet cable(to Linksys wireless router), and power expecting it to simply work. All four lights came on green (power, downstream, upstream, connectivity). The downstream light turned blue which indicates a bonded connection.The device light was blinking on the modem. I connected to my wireless router, but no internet access. I then tried connecting my laptop to the modem directly via Ethernet cable, still no access. I think that rules out the router being the problem. I also ruled out my laptop being the problem as the same thing is occurring with my other laptop and desktop. I called my ISP (Cox Cable) and had them re-establish connection with my modem, this did nothing. I thought for sure this meant I had purchased a faulty modem; I hooked up my old modem and the results were the same, the modem connected fully with no problem (all four lights were green) but I have no internet access.
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Sep 4, 2011
I have a Motorola modem SURFBoard SB4200, along with a wireless Linksys router that connects to that modem. The router works normally but the modem often dies and restarts itself after about 1-2 minutes.
What could be causing this problem? How should I start debugging it?
Could an excessive amount of network traffic be bringing down the modem? Are there any tools that can monitor the modem?
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Aug 26, 2011
how do i open a port on Motorola modem
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Jun 10, 2011
I recently switched from dsl to cable. I have a e2000 router that I would still like to use. The modem I have is a Motorola Surfboard SB6121. It has no options that I can modify. The modem has a built in DHCP server. However, I can't modify it and I don't like the ip configuration it uses. For the time being I have the modem connected to a switch which is working fine. What I would like to know is how to configure the e2000 to use the modems connection. I used PPPoE for DSL and had login information.
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Apr 3, 2011
I've been trying to port forward my modem and router for Xbox 360 live. Only problem is, I know absolutely nothing about networking or configuring modem / router settings.Anyhow, I was told to put my modem into Bridged Ethernet mode. I tried, then I couldn't even connect to the internet anymore.my router model is a Belkin F5D7234-4 V5. My modem is a Motorola 2210-02-1006.
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Oct 21, 2011
I called up the ISP and had him activate the Sb6120 modem.The Dir-655 will not link up with the Sb6120 unless I drop the WAN port speed down to 10MB. Then it will connect. (the light on the modem will come on). I thought the modem was bad so I had the ISP deactivate that one and we tried another Sb6120 samething.I did the firmware update on the Dir-655 to current but samething.
Firmware Version :1.35NA, 2010/11/12
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Sep 18, 2012
Can I access my Motorola SB6120 SURFboard DOCSIS 3.0 eXtreme Broadband Cable Modem while remaining behind my pfSense router?
My LAN Subnet is 10.0.0.1-254.
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Dec 22, 2010
1. Our Motorola SB6120 popped out of existence today; FYI, this was plugged into a brand new APC UPS unit (which does not have coax/cable suppression features).
2. Previously (past days), one interesting thing I have noticed is excessive amounts of distasteful electrostatic shock when working in the closet and touching the metal bearings of the cable & wires. Is the cable not grounded properly, and is it the cause of #1?
Recommend me a surge protector/suppressor strictly for cable (do not need outlets/ethernet/rj45/etc).
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Jan 6, 2012
Just got cable and new hardware and been running bandwidth tests. I know wired is always going to be faster than wireless but was wondering if there were things I can do to see where the bottleneck is.
I have cable internet with a sb6120 modem and the asus rt-n56u router. When I go wired, I get 40+mbs down and when I go wireless I'm getting approx 20mbs down. Dont get me wrong, this is more than adequate but was wondering why the huge difference. I'm not anywhere close to the theoretical max.
The rt-n56u is on firmware 1.0.1.7f which is current. My desktop uses the WMP600n and my laptop has the Intel 5100 AGN built into it - both have updated firmwares.
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Feb 26, 2013
when I connect my DIR-655 to the Motorola SB6141 cable modem I notice that the link speed LED on the cable modem never glows blue indicating a gigabit connection, it only glows amber indicating a lower negotiated speed. I am using a Cat6 cable between the two devices and have also tried a Cat5e cable.
When I try and force the WAN port speed to 1000Mpbs in the router interface the cable modem link speed will not light at all with no connectivity. Only resetting to Auto WAN port speed restores functionality albeit at the lower negotiated speed setting.
I'm running the DIR-655 rev B1 at 2.03NA firmware level.
I did connect the modem directly to my PC that uses an Intel Gigabit ethernet card and still had the lower connection indication (Amber) so it seems that the modem might be faulty.
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Feb 26, 2012
is it possible to connect the wan port of a cable modem to a lan port of the home network? the reason is, i need some wifi access and more ports to my wired network, and the most reasonable solution would be a cable modem router with wifi and 4 ports just plugged into one of my routers.
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Jul 24, 2012
Our small business just moved into a new building and I am in charge of setting up the network infrastructure. I am not new to computers or networking but I have never had to deal with this set up before.
Our current set up.We have a cable modem from comcast that has the Coax cable connected to it.The modem has 4 ports on it. The ports are connected to a built in 24 port switch that was already in the building. The switch has it's ports connected to outlets in the walls. Currently we have 4 computers on our network and since the cable modem had 4 ports it worked fine.
What we need? We will have another person join our office so I will need to activate one additional port on the switch that already exists. However, since all 4 ports on the modem are already taken, I have no way to add an additional port. They also want us to get wifi in the building.How I think I have to solve the problem (most likely wrong).I have to get another switch (like 8 port) and connect the cable modem to the switch using a cross over cable (if there is no designated internet port). Since I have the modem connected to the switch, I will have to move the 3 remaining connections to the switch.
Then I connect the 4 remaining ports on the switch to the existing 24-port switch that is already there. I will use one of the outlets in the building to connect an AP for Wi-Fi for better signal. Currently the modem and switches are hidden in a closet away from the office space and would mess up the signal.
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May 24, 2011
I am looking to permanently reset the default remote management port of the MODEM DPC3825 to something other than 8080. how to PERMANENTLY change the port from 8080? In the web interface under administration I have several times set it to something else other than the defaulted 8080 but when the modem is rebooted or reset, it goes back to the default 8080.
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Jun 15, 2011
I'm currently using Cisco EPC 3000 cable modem and Airlive wt-2400r router. Afaik the cisco isn't a router, but i'm still having some weird problems with forwarding and apparently even DMZ wont work .
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Mar 19, 2011
I get this at random times. My internet disconnects until I reset my modem and I don't think it has anything to do with the modem because I had it replaced by my ISP and they did a few line tests and nothing was wrong. What can I do to avoid having this problem anymore? It's been doing it for almost 2 weeks now and when it decides to do it is random.
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Oct 10, 2011
I have this motorola sbv5121e modem. I can connect one PC to it directly. When I try to connect a secont PC, via a switch, it won't give out 2 IP addresses. Moreover, I see that the one IP address it does give out, is a public one (like 22.x.x.x). I'm on XP and show the addresses with ipconfig. Is this modem defective hardware-wise, or is some setting internally wrong? How can I see what the DHCP server does?
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Feb 23, 2012
I moved to a new house last week, and i have comcast internet which works on cable lines.i have them for years. anyways, i got my own motorola sb5101 modem, which i use for a while now.the problem is that in the new house the modem only works when it is connected to a computer with windows xp, it DOES NOT work on windows vista or 7,also, when i connect my router into it, it does not work either.when i connect it to windows 7 64-bit, it says "unidentified network" and "no internet access" but it works perfectly fine on windows xp 32 bit. (i have 2 xp's and 3 windows 7's)
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Mar 31, 2011
I had to made some hardware changes. All the computers are running windows XP. I changed out to a Motorola 2210 modem, d-link dir-825 router and DGS-1008G switch.Everything was fine until I made this change. I now have internet, but it is slow.
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Mar 23, 2011
I have a adsl setup from my ISP (TDC) and I would like to use my 887va as modem instead of the supplied Motorola Modem.I have the technical info on the connection: VPI = 0, VCI = 101 and RFC1483 AAL5snap. I have supplied the 887VA with an IP address on VLAN1. What is the right direction in terms of access-lists, dialer interfaces, routing etc.I have tried serveral guides on Cisco pages but have not managed to even ping google from my 887va.
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Feb 8, 2011
I have an HP Pavilion wireless laptop with windows vista and a gateway desktop, windows XP Home edition and every thing worked ok untill I got a virus on my desktop Since then I've formated the hard disks and reloaded the opering systems, but I don't know how to get the laptop working wirelessly without taking the motorola modem and connecting it directly to the laptop, I have a D-Link DIR-615 router.
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May 18, 2012
I recently borrowed a friend's desktop and I am having issues with connecting with the router through an ethernet cable. I go to troubleshoot the problem and I get "Local Area Connection 2 doesn't have a valid IP configuration". Its nothing with the router because when I plug my laptop in with the same ethernet cable, I am able to connect perfectly.
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Jul 23, 2012
I have Qwest DSL 7MB internet with a motorola 3347 Qwest model modem and for some reason throughout the day sometimes fewer than than others my internet light will just go red for about 45 seconds up to 2 to 3 minutes them it starts flashing green again? I called them multiple times but they just say maybe its the modem. Is there any test I can do to see? I upgraded the firmware to the newest one to see if that would work but no luck.
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Dec 31, 2011
Suddenly either of my 2 wireless routers won't work. Modem works fine directly to pcIntroducing wireless router to the mix, not working. Everything hooked up correctly.
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Apr 26, 2012
I'm running several game and file servers via a dynamic IP, which I unfortunately cannot change to a static connection for several reasons. I've solved this by using No-IP, which is a Dynamic IP resolution service. This solved the first part of my problem - I can give people IP's for their websites, such as myfreemusic.sytes.net and so forth, but they all HAVE to append their ports to the url - i.e.
site1.sytes.net:90
site2.sytes.net:91
My main problem right now is the game servers - I'm hosting games that default host to 25565, and though I can change the ports the server hosts from, I must give those who want to connect the ports at the end of their urls, i.e.
server1.sytes.net:25566
server2.sytes.net:25567
I know DNS is essentially agnostic when it comes to ports, so no solution there. And I don't think the game (Minecraft vis-a-vis bukkit) supports SRV records, and even if they did, I'd have no idea how to configure them. How can I resolve static urls redirecting to a dynamic IP by pointing them to ports?
To simplify the question -
How can I make server1.sytes.net resolve to port 25566, and server2.sytes.net resolve to port 25567 when the default port is set to 25565?
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