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pxe_in_the_modem_via_dhcp [2017/11/19 19:21] (current) admin created |
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+ | <blockquote>In computing, the Preboot eXecution Environment (PXE, sometimes pronounced as pixie[1]) specification describes a standardized client-server environment that boots a software assembly, retrieved from a network, on PXE-enabled clients. On the client side it requires only a PXE-capable network interface controller (NIC), and uses a small set of industry-standard network protocols such as DHCP and TFTP..<cite>Wikipedia</cite></blockquote> | ||
+ | == Firmware of the modems == | ||
+ | The firmware of the modem contain the DHCP responsive of the IP attribution, DNS server. But this DHCP server can define a image PXE. Combining with a TFTP server, the modem can boot an Operating System or a software (**include malware**). | ||
+ | |||
+ | == OLT == | ||
+ | The OLTs are control and central point to do far communication like GPON used into fiber to home (FTTH). This OLT can download the firmware, edit it and re-upload the edited firmware to do the previously mentioned. | ||
+ | |||
+ | == Tips == | ||
+ | * **Disable PXE boot** | ||
+ | * For the critical zone | ||
+ | * Take care of your ISP | ||
+ | * Disable DHCP and enable static IP |