Yellow Bricks

by Duncan Epping

SSH on OSX Mojave failing with broken pipe error

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I recently upgraded my Macbook to OSX Mojave (10.14.1). Ever since I upgraded whenever I want to open an SSH session to any server on the internal (VMware) network I would receive the following error message:

packet_write_wait: connection to x.y.z. port 22: broken pipe

Very annoying as it made deploying labs in our dev cloud very complicated. I googled around and there were many suggestions on how to solve this, but none worked so far. A colleague today pointed me to thread on VMTN (surprisingly) which describes how to solve the problem. it is very simple, just add “ssh -o IPQoS=throughput” to your normal ssh command. So something like the following:

ssh -o IPQoS=throughput root@192.168.1.1

Thanks Alex for the pointer, and thanks Quinn for posting the solution on VMTN! Oh, and yes you can add the following to your ~/.ssh/config so that you don’t have the use the -o flag everytime:

Host *
IPQoS=throughput

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Comments

  6. Everton says

    This problem took some hours of my day. I’m glad you shared the solution. Thanks!