PPTPD on lxd unprivileged container












0















There is lxd-3.0.3 unprivileged (containers with uid shift started by root) on
Ubuntu-18.04 (amd64). In container there is Ubuntu-16.04.5 (amd64).
How to configure pptpd on it? It seems that there is problem with ppp0 interface. It is not available.



Here if fragment of log:




Feb 13 19:21:22 blabla100 pppd[25943]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Feb 13 19:21:22 blabla100 pppd[25943]: Couldn't open the /dev/ppp device: No such file or directory
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: FATAL: Module ppp_generic not found in directory /lib/modules
Feb 13 19:21:27 blabla100 pptpd[25927]: /usr/sbin/pppd: You need to create the /dev/ppp device node by
Feb 13 19:21:27 blabla100 pptpd[25927]: executing the following command as root:
Feb 13 19:21:27 blabla100 pptpd[25927]: mknod /dev/ppp c 108 0
Feb 13 19:21:27 blabla100 pppd[25935]: You need to create the /dev/ppp device node by
executing the following command as root:
mknod /dev/ppp c 108 0


So I guess I must create /dev/ppp on host, but how to allow to access it only in this container, not other containers.










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  • Welcome to Ask Ubuntu! Right now, your question lacks any helpful description. The good thing is, you can simply edit your question and include as much description as you like. Please take the time to explain what you are doing where you hit a problem. Please read tour and How to Ask before asking a question.

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    Feb 14 at 8:28
















0















There is lxd-3.0.3 unprivileged (containers with uid shift started by root) on
Ubuntu-18.04 (amd64). In container there is Ubuntu-16.04.5 (amd64).
How to configure pptpd on it? It seems that there is problem with ppp0 interface. It is not available.



Here if fragment of log:




Feb 13 19:21:22 blabla100 pppd[25943]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Feb 13 19:21:22 blabla100 pppd[25943]: Couldn't open the /dev/ppp device: No such file or directory
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: FATAL: Module ppp_generic not found in directory /lib/modules
Feb 13 19:21:27 blabla100 pptpd[25927]: /usr/sbin/pppd: You need to create the /dev/ppp device node by
Feb 13 19:21:27 blabla100 pptpd[25927]: executing the following command as root:
Feb 13 19:21:27 blabla100 pptpd[25927]: mknod /dev/ppp c 108 0
Feb 13 19:21:27 blabla100 pppd[25935]: You need to create the /dev/ppp device node by
executing the following command as root:
mknod /dev/ppp c 108 0


So I guess I must create /dev/ppp on host, but how to allow to access it only in this container, not other containers.










share|improve this question

























  • Welcome to Ask Ubuntu! Right now, your question lacks any helpful description. The good thing is, you can simply edit your question and include as much description as you like. Please take the time to explain what you are doing where you hit a problem. Please read tour and How to Ask before asking a question.

    – Mr Shunz
    Feb 14 at 8:28














0












0








0








There is lxd-3.0.3 unprivileged (containers with uid shift started by root) on
Ubuntu-18.04 (amd64). In container there is Ubuntu-16.04.5 (amd64).
How to configure pptpd on it? It seems that there is problem with ppp0 interface. It is not available.



Here if fragment of log:




Feb 13 19:21:22 blabla100 pppd[25943]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Feb 13 19:21:22 blabla100 pppd[25943]: Couldn't open the /dev/ppp device: No such file or directory
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: FATAL: Module ppp_generic not found in directory /lib/modules
Feb 13 19:21:27 blabla100 pptpd[25927]: /usr/sbin/pppd: You need to create the /dev/ppp device node by
Feb 13 19:21:27 blabla100 pptpd[25927]: executing the following command as root:
Feb 13 19:21:27 blabla100 pptpd[25927]: mknod /dev/ppp c 108 0
Feb 13 19:21:27 blabla100 pppd[25935]: You need to create the /dev/ppp device node by
executing the following command as root:
mknod /dev/ppp c 108 0


So I guess I must create /dev/ppp on host, but how to allow to access it only in this container, not other containers.










share|improve this question
















There is lxd-3.0.3 unprivileged (containers with uid shift started by root) on
Ubuntu-18.04 (amd64). In container there is Ubuntu-16.04.5 (amd64).
How to configure pptpd on it? It seems that there is problem with ppp0 interface. It is not available.



Here if fragment of log:




Feb 13 19:21:22 blabla100 pppd[25943]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Feb 13 19:21:22 blabla100 pppd[25943]: Couldn't open the /dev/ppp device: No such file or directory
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/
Feb 13 19:21:22 blabla100 pptpd[25927]: modprobe: FATAL: Module ppp_generic not found in directory /lib/modules
Feb 13 19:21:27 blabla100 pptpd[25927]: /usr/sbin/pppd: You need to create the /dev/ppp device node by
Feb 13 19:21:27 blabla100 pptpd[25927]: executing the following command as root:
Feb 13 19:21:27 blabla100 pptpd[25927]: mknod /dev/ppp c 108 0
Feb 13 19:21:27 blabla100 pppd[25935]: You need to create the /dev/ppp device node by
executing the following command as root:
mknod /dev/ppp c 108 0


So I guess I must create /dev/ppp on host, but how to allow to access it only in this container, not other containers.







lxd pptp unprivileged






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edited Feb 14 at 9:06







user2772439

















asked Feb 14 at 8:19









user2772439user2772439

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  • Welcome to Ask Ubuntu! Right now, your question lacks any helpful description. The good thing is, you can simply edit your question and include as much description as you like. Please take the time to explain what you are doing where you hit a problem. Please read tour and How to Ask before asking a question.

    – Mr Shunz
    Feb 14 at 8:28



















  • Welcome to Ask Ubuntu! Right now, your question lacks any helpful description. The good thing is, you can simply edit your question and include as much description as you like. Please take the time to explain what you are doing where you hit a problem. Please read tour and How to Ask before asking a question.

    – Mr Shunz
    Feb 14 at 8:28

















Welcome to Ask Ubuntu! Right now, your question lacks any helpful description. The good thing is, you can simply edit your question and include as much description as you like. Please take the time to explain what you are doing where you hit a problem. Please read tour and How to Ask before asking a question.

– Mr Shunz
Feb 14 at 8:28





Welcome to Ask Ubuntu! Right now, your question lacks any helpful description. The good thing is, you can simply edit your question and include as much description as you like. Please take the time to explain what you are doing where you hit a problem. Please read tour and How to Ask before asking a question.

– Mr Shunz
Feb 14 at 8:28










1 Answer
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The Unix character device /dev/ppp on the host is the way you can access the kernel module for ppp.ko. Therefore, you need to get LXD to link that character device into the LXD container. Here is how it's done:



$ lxc config device add mypptpcontainer mypppdevice unix-char source=/dev/ppp uid=0 gid=0 mode=0600


where:





  1. mypptpcontainer is the name of your LXD container.


  2. mypppdevice is just a name for this LXD device. Pick any name.

  3. the rest specify the characteristics of the unix character device.






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    1 Answer
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    The Unix character device /dev/ppp on the host is the way you can access the kernel module for ppp.ko. Therefore, you need to get LXD to link that character device into the LXD container. Here is how it's done:



    $ lxc config device add mypptpcontainer mypppdevice unix-char source=/dev/ppp uid=0 gid=0 mode=0600


    where:





    1. mypptpcontainer is the name of your LXD container.


    2. mypppdevice is just a name for this LXD device. Pick any name.

    3. the rest specify the characteristics of the unix character device.






    share|improve this answer




























      0














      The Unix character device /dev/ppp on the host is the way you can access the kernel module for ppp.ko. Therefore, you need to get LXD to link that character device into the LXD container. Here is how it's done:



      $ lxc config device add mypptpcontainer mypppdevice unix-char source=/dev/ppp uid=0 gid=0 mode=0600


      where:





      1. mypptpcontainer is the name of your LXD container.


      2. mypppdevice is just a name for this LXD device. Pick any name.

      3. the rest specify the characteristics of the unix character device.






      share|improve this answer


























        0












        0








        0







        The Unix character device /dev/ppp on the host is the way you can access the kernel module for ppp.ko. Therefore, you need to get LXD to link that character device into the LXD container. Here is how it's done:



        $ lxc config device add mypptpcontainer mypppdevice unix-char source=/dev/ppp uid=0 gid=0 mode=0600


        where:





        1. mypptpcontainer is the name of your LXD container.


        2. mypppdevice is just a name for this LXD device. Pick any name.

        3. the rest specify the characteristics of the unix character device.






        share|improve this answer













        The Unix character device /dev/ppp on the host is the way you can access the kernel module for ppp.ko. Therefore, you need to get LXD to link that character device into the LXD container. Here is how it's done:



        $ lxc config device add mypptpcontainer mypppdevice unix-char source=/dev/ppp uid=0 gid=0 mode=0600


        where:





        1. mypptpcontainer is the name of your LXD container.


        2. mypppdevice is just a name for this LXD device. Pick any name.

        3. the rest specify the characteristics of the unix character device.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Feb 22 at 21:39









        SimosSimos

        2876




        2876






























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