 NetFixerFrom my cold dead handsPremium
join:2004-06-24
The Boro
 ·Comcast Business..
 ·Vonage
 ·Cingular Wireless
·Comcast
| reply to oasiscompute
Re: [Business] Switched to Comcast Business - problems said by oasiscompute :I don't need a external ip package for 15 bucks a months more, this ubee is 2 times as fast and I'm going to see if I can put it in bridge mode I may flash the firmware which will kill my internet then I guess I will try the SMC again but I'm still not getting an external ip package that I don't need without a domain to maintain.
Which has absolutely nothing to do with being able to forward ports (or not) using a Comcast supplied SMC gateway.
Hint: The problem is not with the SMC gateway, or with having a dynamic vs a static IP account.
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History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower |
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 joakoPremium
join:2000-09-07
/dev/null
kudos:5
·Comcast
| reply to JohnInSJ
If the service was installed in the last 30 days remember Comcast business has a satisfaction guarantee where they will refund all the service and installation fees and let you out of your contract. Leverage this to your advantage. No need to even provide a technical reason, simply you want an SB6120 and you won't be satisfied otherwise.
said by JohnInSJ:The only SUPPORTED configs are dynamic or static IP(s), the funky bridge mode that doesn't survive a reset isn't supported. Might be a secret option, but it's not a supported config.
SB6120 (leased) on single dynamic IP is also a supported configuration.
Derek:
Since you have digital voice and internet here is what I would try: Unplug your SMC from the power and call 800-COMCAST. Tell them your internet went down and aren't getting a connection with the modem. They will try to schedule someone to come out, tell them you need to be online for a important confrence call in a hour, ask if they can "somehow" activate your eMTA (phone device) so you can at least get your laptop online. Once they setup the internet on the eMTA return the SMC to the nearest Comcast office (make sure you get a receipt). If they setup an appointment, login to your account and cancel it.
Also, you might, might, just be able to save $7 on the modem rental fee this way. If you don't I wouldn't push it, but if you do that's just a bonus.
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PRescott7-2097 |
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| reply to NetFixer
As I said on the 2 SMC's I tried "when you check Enable" the gateway will automatically refresh and un-check before you can click apply.
netstat don't lie and I know you have a external ip package from Comcast otherwise you could not forward ports to 192168.10.11, you would only have one ip 10.1.10.1 |
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| reply to joako
As I said Comcast voice is under the residential side and B-class operation CAN NOT activate internet on the ARRIS modem that's just for the phone. |
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NetFixerFrom my cold dead handsPremium
join:2004-06-24
The Boro Reviews:
·Comcast Business..
·Vonage
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·Comcast
2 edits | reply to oasiscomput1
said by oasiscomput1:As I said on the 2 SMC's I tried "when you check Enable" the gateway will automatically refresh and un-check before you can click apply.
netstat don't lie and I know you have a external ip package from Comcast otherwise you could not forward ports to 192168.10.11, you would only have one ip 10.1.10.1
And as I said, if you don't click on the enable check box, port forwarding will work with no problems. Once more, the enable check box is a toggle mechanism, if you click on it and the function is already enabled (which it is when you click on the apply button when you created the port forwarding rule), the the rule state will toggle to disabled. The screen shots I supplied, and the fully functioning forwarded ports don't lie either. In your case, netstat is likely not lying either, because you shot yourself in the foot and disabled your port forwarding rule(s) immediately after creating them.
I am sorry that you have such a problem understanding something that is rather obvious to most users, but don't keep spreading your unfounded claims that the SMC gateway will not forward ports just because you can't seem to grasp how to do it.
And FWIW, the private IP subnet that I chose for my SMC gateway and/or the private IP addresses of connected devices is irrelevant to any problem(s) that you have understanding basic networking. I suggest that you either actually try what I told you (follow the step by step instruction explicitly), or go spread your manure somewhere else.
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History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower |
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joakoPremium
join:2000-09-07
/dev/null
kudos:5 Reviews:
·Comcast
| reply to oasiscomput1
said by oasiscomput1:As I said Comcast voice is under the residential side and B-class operation CAN NOT activate internet on the ARRIS modem that's just for the phone.
Correct. I assumed it was business voice.
Your only option then is to call 800-COMCAST and request a Motorola SB6120. Comcast will send a technician to perform the swap on a business account for free.
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PRescott7-2097 |
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Reviews:
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| reply to noc007
Re: Switched to Comcast Business - problems said by noc007:said by BeanBag:I don't know if this is the same setup as you have but I just had Comcast Biz installed at a company I support, the tech gave me this info
»10.1.10.1
login-- cusadmin
password-- highspeed
It lets you log into their modem. I haven't had a chance to look at it really at all so I can't say if this is a solution for you, but maybe this might help some?
That's the customer admin that let you setup port forwarding, changing the subnet range, etc. It doesn't let you put the gateway into bridge mode. There was an older SMC model that you could terminal into and set it to bridge mode, but Comcast wised up and wanted something that locked out the customer from doing it. there's a great way around the smc for those without static ips....turn on the dmz...set your routers wan to a static ip int he same ip subnet of the gateway..tell the gateway the ip of the routers wan is the dmz host and bang..no more smc in the way. Everything works just as it should.
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Carpe Ductum - "Grab the Tape"
www.emmanuelcomputerconsulting.com |
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| reply to NetFixer
Re: [Business] Switched to Comcast Business - problems I just turn on the DMZ host of the Cmodem and set the wan ip of my firewall servers to match that ip and the smc is effectively bypassed..:)
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Carpe Ductum - "Grab the Tape"
www.emmanuelcomputerconsulting.com |
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|
 JohnInSJPremium
join:2003-09-22
San Jose, CA
·PHONE POWER
·Comcast
| said by hescominsoon:I just turn on the DMZ host of the Cmodem and set the wan ip of my firewall servers to match that ip and the smc is effectively bypassed..:)
But you still end up with double nat, which is bad.
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Reviews:
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| no you don't. only the single nat of your firewall..the modem is transparent and it forwards ALL traffic from wan to dmz un natted. I've done this several times it works perfectly just as if you had bridged the modem.
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Carpe Ductum - "Grab the Tape"
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Reviews:
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 ·DSL EXTREME
| reply to hescominsoon
said by hescominsoon:I just turn on the DMZ host of the Cmodem and set the wan ip of my firewall servers to match that ip and the smc is effectively bypassed..:)
Could you give more detailed instructions on how to do this. I've been wanting to set up a pfSense box behind my modem and this appears to be the best way.
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Craig
»www.CraigHarris.org My BLOG on Motorcycles and Computer Stuff. |
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NetFixerFrom my cold dead handsPremium
join:2004-06-24
The Boro Reviews:
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2 edits | reply to hescominsoon
said by hescominsoon:no you don't. only the single nat of your firewall..the modem is transparent and it forwards ALL traffic from wan to dmz un natted. I've done this several times it works perfectly just as if you had bridged the modem.
You may not realize that it is double nat because you only have to do your port forwarding on your other router (and probably because you don't really know what NAT is). However, if you look at the IP address on your other router's WAN interface (the same IP address that you put into the SMC gateway's DMZ setup) and its gateway IP address, you will see that it is using the private IP subnet of the SMC gateway, not Comcast public IP addresses. That means that both routers are indeed doing NAT (which is an acronym for Network Address Translation, and it is so named because the network address must be translated between a private IP address and a public IP address), so any device behind your other router will indeed be going through a double NAT connection.
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History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower |
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NetFixerFrom my cold dead handsPremium
join:2004-06-24
The Boro Reviews:
·Comcast Business..
·Vonage
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·Comcast
| reply to Chester2
said by Chester2:said by hescominsoon:I just turn on the DMZ host of the Cmodem and set the wan ip of my firewall servers to match that ip and the smc is effectively bypassed..:)
Could you give more detailed instructions on how to do this. I've been wanting to set up a pfSense box behind my modem and this appears to be the best way. You do it as shown in the image below. FWIW, the IP address in my image is for the WAN interface on my Vonage/Motorola VoIP router, and it works just fine with cascaded NAT, but some applications may barf behind a cascaded NAT connection, so YMMV.
FYI: pay no attention to hescominsoon's misguided claim that doing this is not cascaded (double) NAT.
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History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower |
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joakoPremium
join:2000-09-07
/dev/null
kudos:5 | reply to hescominsoon
Re: Switched to Comcast Business - problems You still can't use many DDNS clients with that configuration.
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PRescott7-2097 |
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Reviews:
·Comcast
| said by joako:You still can't use many DDNS clients with that configuration.
that is one thing you cannot do.
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Carpe Ductum - "Grab the Tape"
www.emmanuelcomputerconsulting.com |
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NetFixerFrom my cold dead handsPremium
join:2004-06-24
The Boro Reviews:
·Comcast Business..
·Vonage
·Cingular Wireless
·Comcast
| said by hescominsoon:said by joako:You still can't use many DDNS clients with that configuration.
that is one thing you cannot do. And that is because many router hosted DDNS clients report the router's WAN IP address to the DDNS server, not the real public IP address. That should be all the proof you need that configuring an external router's WAN into the SMC gateway's DMZ results in a cascaded NAT situation. If there was not a cascaded NAT, and the external router's WAN interface had the public IP address, the DDNS client would report the public IP address to it's server.
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History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower |
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Reviews:
·Comcast
1 edit | reply to NetFixer
said by NetFixer:Also, it is my understanding that even if/when Comcast relents and allows a standard modem to be used, they will still leave the SMC gateway with you, and will continue to charge you the monthly rental for it.
What if you return the SMC at the service center? Would they chase you down in the parking lot and throw it into your car like some technological hot potato? |
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| reply to NetFixer
Re: [Business] Switched to Comcast Business - problems Why are you using a Netgear FS105 instead of a Netgear GS105? |
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NetFixerFrom my cold dead handsPremium
join:2004-06-24
The Boro Reviews:
·Comcast Business..
·Vonage
·Cingular Wireless
·Comcast
| reply to Mike Wolf
Re: Switched to Comcast Business - problems said by Mike Wolf:said by NetFixer:Also, it is my understanding that even if/when Comcast relents and allows a standard modem to be used, they will still leave the SMC gateway with you, and will continue to charge you the monthly rental for it.
What if you return the SMC at the service center? Would they chase you down in the parking lot and throw it into your car like some technological hot potato? I am sure that the folks at the service center will take the SMC gateway and put it back into stock. That was not the point. The point is that if your contract says you will have a monthly equipment charge, most likely you will continue to have a monthly equipment charge until the contract term ends (and you better be sure to keep the return receipt from the service center, because I can pretty much guarantee that Comcast will want the SMC gateway accounted for if/when you terminate the business class service).
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History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower |
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