Fun with Kermit and ZMODEM over SSH

Re:Fun with Kermit and ZMODEM over SSH by jebr224 on Tuesday April 25, 2023 @01:52PM (#35704133)

Kermit is still used in the embedded space, on modern platforms specifically for uboot.

zmodem can also be used in embedded spaces to retrieve files if the only interface is a serial port.

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Re:Fun with Kermit and ZMODEM over SSH by jabbany on Tuesday April 25, 2023 @01:58PM (#35704216)

This! I still recall using zmodem not that long ago for this exact purpose of sending firmware blobs over just a serial connection.

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Re:Fun with Kermit and ZMODEM over SSH by waste_monk on Wednesday April 26, 2023 @03:30AM (#35710526)

We have switches purchased in the last few years that use zmodem for firmware upload and recovery.

Annoyingly it still supports a maximum of 115200 baud, even though the serial port on the switch is physically USB-C, so on the one occasion we had a switch brick itself and had to use zmodem "in anger" it took quite a long time to upload the replacement firmware.

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