Hi, Is it true that my program needs to have root access in order to change socket options with tproxy? If so, is there a workaround for it? Currently, I have a program running under a non-root user and needs to use tproxy but it keeps getting "Operation not permmited" error when trying to set socket option using tproxy. I'm using 2.6.14 kernel and its corresponding tproxy patch. Eric TREND MICRO EMAIL NOTICE The information contained in this email and any attachments is confidential and may be subject to copyright or other intellectual property protection. If you are not the intended recipient, you are not authorized to use or disclose this information, and we request that you notify us by reply mail or telephone and delete the original message from your mail system.
Is it true that my program needs to have root access in order to change socket options with tproxy?
You need CAP_NET_ADMIN capabilities.
If so, is there a workaround for it?
Either change the code, or make sure your program somehow get's / keeps the CAP_NET_ADMIN caps.
Currently, I have a program running under a non-root user and needs to use tproxy but it keeps getting "Operation not permmited" error when trying to set socket option using tproxy.
You can simply drop all capabilities except CAP_NET_ADMIN and be done with it. See the capabilities and prctl() manpage. Igmar
Is it true that my program needs to have root access in order to change socket options with tproxy?
You need CAP_NET_ADMIN capabilities.
If so, is there a workaround for it?
Either change the code, or make sure your program somehow get's / keeps the CAP_NET_ADMIN caps.
Currently, I have a program running under a non-root user and needs to use tproxy but it keeps getting "Operation not permmited" error when trying to set socket option using tproxy.
You can simply drop all capabilities except CAP_NET_ADMIN and be done with it. See the capabilities and prctl() manpage.
I used my very own kernel module for that, http://jengelh.hopto.org/p/multiadm/ Loading it using `modprobe multiadm Netuid=31` gives UID 31 (squid in my case) CAP_NET_ADMIN. Jan Engelhardt --
participants (3)
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eric_chao＠trend.com.tw
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Igmar Palsenberg
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Jan Engelhardt