hello!
You're right. I use the ephermal ports that are given by the local system
(/proc/sys/net/ipv4/ip_local_port_range) and I verify if the chosen port is
actually available before starting OpenVPN with it, so that should not be the
problem.
Kind regards,
SaAtomic
10. Apr 2017 11:10 by chipits...@gmail.com:
>
>
> 2017-04-10 13:34 GMT+05:00 <> saato...@keemail.me> >:
>
>> >> Hello!
>> I have a project, where I connect/disconnect numerous times with a single
>> client to my OpenVPN server within a short time (e.g. 70 connect/disconnects
>> within 10 minutes).
>>
>> Now, if I configure a specific lport in the client configuration (anything
>> between 32768 and 60999), I get a lot of errors that the port is already in
>> use.
>>
>
> as for > https://tools.ietf.org/html/rfc6056#page-5
> ports "49152 through 65535" are recommended for outgoing ports (unless
> specified manually)
>
>
> it means, any application can take random port from that range for outgoing
> connection (it happens due to OS choice)
>
> be careful with Ephemeral ports
>
>>
>> "TCP/UDP: Socket bind failed on local address [undef]: Address already in
>> use"
>>
>> I guess this is because, the port hasn't been made available yet, after the
>> last OpenVPN process terminated. I terminate the OpenVPN process gracefully
>> and use `explicit-exit-notify 3` if that makes a difference.
>> However, I don't seem to have this issue when I don't use the `lport` at
>> all, and let OpenVPN use the default.
>>
>> I don't see much of a difference there. Is it the high port number that is
>> used by `lport`?
>> Does this even relate the OpenVPN or is it more of an issue of the host
>> operating system?
>>
>> I can't use the default `lport`, as I want to be able to start multiple
>> OpenVPN instances on the client.
>>
>> Does anyone have an idea, how I could resolve or at least mitigate this
>> issue?
>>
>> Thanks and kind regards,
>> SaAtomic
>>
>> ------------------------------------------------------------------------------
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, Slashdot.org! >> http://sdm.link/slashdot
>> _______________________________________________
>> Openvpn-users mailing list
>> Openvpn-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/openvpn-users
>>
>>
>
>
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Openvpn-users mailing list
Openvpn-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/openvpn-users
