‎Kastus | Comcast Business Support Community

cable haunt

With recent announcement of "Cable Haunt" critical vulnerability in cable modems (https://cablehaunt.com) I am wondering what is the Comcast stand on it. What modems/gateways are affected, if any? E.g., is DPC3941B vulnerable? Thanks, Kastus

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Re: Lose connection while modem renews internal DHCP?

I am having the same problem. My circuit was installed on November 20, 2019, and the first renewal of the address on erouter0 interface in the DP3941 happened on December 7. After that, DHCP lease time dropped to 12 hours. Every time address on the erouter0 interface is renewed, all connections thro

For posterity, when someone digs up this thread several years later looking for solution which was not provided, here is how it was fixed.DHCP renewal is just a red herring. It is a consequence of soft reset of DPC3941B. Soft reset is not recorded in

Re: Lose connection while modem renews internal DHCP?

I am having the same problem. My circuit was installed on November 20, 2019, and the first renewal of the address on erouter0 interface in the DP3941 happened on December 7. After that, DHCP lease time dropped to 12 hours. Every time address on the erouter0 interface is renewed, all connections thro

Now the modem didn't even last till address expiration time and renewed it multiple times: 2019/12/22 07:12:13 Notice [Dhcpc][12601]: erouter0 got new IP 98.248.24.1192019/12/22 06:01:33 Notice [Dhcpc][17636]: erouter0 got new IP 98.248.24.1192019/12

Re: Lose connection while modem renews internal DHCP?

I am having the same problem. My circuit was installed on November 20, 2019, and the first renewal of the address on erouter0 interface in the DP3941 happened on December 7. After that, DHCP lease time dropped to 12 hours. Every time address on the erouter0 interface is renewed, all connections thro

It's a single DPC3941B in passthrough mode. Firewall with static IP address is plugged in LAN Ethernet port 3.

Re: Lose connection while modem renews internal DHCP?

I am having the same problem. My circuit was installed on November 20, 2019, and the first renewal of the address on erouter0 interface in the DP3941 happened on December 7. After that, DHCP lease time dropped to 12 hours. Every time address on the erouter0 interface is renewed, all connections thro

Ken, Please go ahead and take a closer look. I sent requested details in a private message. Thanks!

Re: Lose connection while modem renews internal DHCP?

I am having the same problem. My circuit was installed on November 20, 2019, and the first renewal of the address on erouter0 interface in the DP3941 happened on December 7. After that, DHCP lease time dropped to 12 hours. Every time address on the erouter0 interface is renewed, all connections thro

Thank you for looking, Ken. I am afraid it's a bit of misunderstanding. I have a static IP address, and the modem (DP3941) provided by Comcast is in "passthrough" mode. Modem is *not* issuing dynamic IP addresses to the connected devices. The only

Re: Lose connection while modem renews internal DHCP?

I am having the same problem. My circuit was installed on November 20, 2019, and the first renewal of the address on erouter0 interface in the DP3941 happened on December 7. After that, DHCP lease time dropped to 12 hours. Every time address on the erouter0 interface is renewed, all connections thro

It's 2019, and I am having exactly the same problem with recently installed Cisco DP3941. Was the problem resolved by replacing cisco with SMC? If so, I wonder if SMC modems are still available.

Re: Lose connection while modem renews internal DHCP?

I am having the same problem. My circuit was installed on November 20, 2019, and the first renewal of the address on erouter0 interface in the DP3941 happened on December 7. After that, DHCP lease time dropped to 12 hours. Every time address on the erouter0 interface is renewed, all connections thro

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need PTR record for my static IP address

I just got my connection set up and I wonder how can I get PTR record set for my static IP?

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