Dont trust Comcast upon renewal of contract
As I renewed my new contract with comcast I was told I would get a new modem as the one we have is old and "the new ones are much better" The lady said she would set that up for me and that I would be...
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How to enable bridge mode on DPC3939B and keep static IPs
This post is for Comcast business customers who receive a DPC3939B gateway from Comcast but want to pass the static IPs assigned to it on through to another gateway on the network. As you probably...
View ArticleCorrect router configuration for a DPC3939B in 'Bridge Mode'
Hello Everyone!I've PM'd Comcast_John for assistance but I thought I'd post here too while waiting for his reply.My Comcast Business was installed last week (phone + internet). As part of the work, the...
View ArticleDPC3939b Gateway IP greyed out
I have got a DPC3939b comcast modem. I am trying to change the LAN gateway IP from the default 10.1.10.1 IP to a 10.42.61.3 IP. When I try to do that it will not allow me to change the last octet. I...
View Articleneed help resetting my Comcast Business Gateway reset.
Hi, I have a model SMCD3G-CCR I upgraded my wi-fi router that came off of this unit, and in checking everything, I found I cannot get into my Comcast Business modem to check the firewall settings. I...
View ArticleWhat can I do to check if there is a upgraded business modem available?
I have a SMCD3G-CCR modem for my Business. It is about 4 years old, what available upgrades could I possibly upgrade to? Thanks, D. Wise
View ArticleTech tells me I cannot have internet + phone on Arris TM822G together?
We bought an Arris TM822G so we don't have to lease a modem/gateway from Comcast. Yesterday they activated my internet on it, but had issues getting the phone to work. The techs managed to fix it by...
View Articleconnection
I have had my service for one week and have yet to be able to get connected to anything. When the technician was here he said it could be my computer. I did not have any trouble before this was...
View ArticleComcast Cisco DPS 3939B with Cisco ASA 5505
HiWe have received a Cisco DPS 3939B and some static IP's.We want to migrate the ASA from the old non Comcast circuit to our new Comcast circuit, utilising one of the new static IP's. The ASA will...
View ArticleSmC Modem Bridge Mode?
Can someone tell me if I should still be able to login to an smc3g moem if it has been put in bridge mode. Our network has been acting flaky lately and I wanted to atake a look at any settings in the...
View ArticleCisco log-in
I can't log-in to my Cisco DPC3939B. Defaults, cusadmin and highspeed do not work. I reset the router several times but no change. Also my network key has changed and I can't access the WiFi. I believe...
View ArticlePoor performance with new modem
We're a school that uses Comcast Business cable service (75 Mbps/15 Mbps) as a secondary connection to supplement a fiber line. Because of a third-party's error, our service with Comcast was terminated...
View ArticleInstalling asa5505 between Comcast SMC switch and inside address
I am going to install an ASA5505 security appliance between my SMC appliance and my inside network. I already have the 5 static IP addresses but would like guidance on what I need to change on my...
View ArticleProblems after DPC3939B firmware upgrade
We're a church w/a 100/20 plan and we internally run on IPv4 w/a mix of DHCP and static IPv4 addresses. For several months, we had absolutely no issues with the Biz Internet service. Two weeks ago...
View ArticleNeed Gateway set to True Bridged Mode
Hi, We are adding our office to our corporate network and will be using a Clavister E5 attached to the Comcast IP gateway. We have a single static IP and the E5 is configured to take over once our IP...
View ArticleBuying own Modem
We are using Comcast Business Starter Internet for our office and planning to buy a modem instead of leasing it.I'm checking Comcast's website. It's showing the following modems are compatible for our...
View ArticleCisco Gateway Firewall Settings and Best Practice
Hi. We have a single static IP address. We have no other firewall device aside from the Cisco. My initial question is this: what is the meaning of "Disable Firewall for True Static IP Subnet Only"? The...
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Need Gateway set to True Bridge Mode
I am attempting to set up my Cisco Meraki server, but need my comcast gateway set to True Bridge Mode.
View ArticleCisco DPC 3939B on an existing network
I have just moved from Comcast Residential to comcast Business. The business installation is complete and the service is on. I have an existing home - home office ethernet network with Newest Apple...
View ArticleRunning a low volume Exchange server on a dynamic IP account
We run a 3 user office that runs a small Exchange server with a static IP Comcast Business account. We are looking at reducing costs so we want to buy a cable modem to avoid the $149.00 annual rental...
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