Date: Thu, 28 Feb 2019 11:58:30 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> To: freebsd-jail@freebsd.org Subject: how to determine primary (source) IP address in jail Message-ID: <781124ab-ca3e-f410-1a60-649e216cded6@quip.cz>
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Is there some easy way to determine the primary (source) address which is used in jail with multiple IP addresses? I came to this problem with running local_unbound in jail. Unbound refuses queries originating in this jail because the do not come from real 127.0.0.1 (which is the only one allowed by default). Unbound in jail see requests come from jails IP. It is easy to determine (in shell script) if jail has only one IP. But what in case where jail has multiple IPs? Is there some sysctl or some call to ifconfig or any other util to get the IP which will be used as source address for queries on local services in jail? I know I can allow all IPs of jail in access-control: a.b.c.d/32 allow access-control: e.f.g.h/32 allow I am just curios if there is some way to get "primary" IP in jail without calling anything from the host environment. Kind regards Miroslav Lachman
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