Troubleshoot email, wireless, intermittent connection and slow speeds Setup and Troubleshoot e-mail software Security Downloads, Information, and Terms Setup and Troubleshoot Modems Setup and Troubleshoot Wireless on your Computer or Modem step-by-step tutorials on wired troubleshooting, wireless troubleshooting and email

   Cisco 678


All the material covered in the video, as well as Wi-Fi set-up, is documented here:



Modem FAQs


Q: Can I connect multiple Ethernet connections to my modem?
A: No, this modem has 1 Ethernet port on the back.

Q: Does my modem act as a firewall?
A: This modem provides security using a firewall and Network Address Translations (NAT), which acts as a barrier between your network and the Internet.

Q: Which Virtual Private Networking (VPN) protocols are supported?
A: This modem supports pass-through for IPSec, PPTP and L2TP.

Q: What is Modem Firmware?
A: Firmware is like an operating system that tells your modem how to operate. It provides the modem's hardware with operating rules, instructions, and logic.

Q: Why Should I Upgrade Firmware?
A: Firmware upgrades can add new features, improve performance and enhance the security of the modem's current firmware.

Q: How can I improve my resilience to denial-of-service attacks?
We strongly recommend all Cisco® 675/678 users upgrade to Cisco Broadband Operating System (CBOS) version 2.4.6 to avoid the vulnerabilities associated with older CBOS versions. Use the Firmware section to update your modem. Read the Cisco Systems advisory outlines specific, identified vulnerabilities in CBOS security of older versions.