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| author | David Gibson <david@gibson.dropbear.id.au> | 2024-10-03 15:14:02 +1000 |
|---|---|---|
| committer | Stefano Brivio <sbrivio@redhat.com> | 2024-10-04 19:04:29 +0200 |
| commit | ff63ac922a4017de8a5d384b1c0be36433436ed8 (patch) | |
| tree | 3aefa92d8c802acc2116f2136158c05efdc964cb /passt.1 | |
| parent | 9d66df9a9a45b9305a2daff8a3c09a28f2c78d83 (diff) | |
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conf: Add --dns-host option to configure host side nameserver
When redirecting DNS queries with the --dns-forward option, passt/pasta
needs a host side nameserver to redirect the queries to. This is
controlled by the c->ip[46].dns_host variables. This is set to the first
first nameserver listed in the host's /etc/resolv.conf, and there isn't
currently a way to override it from the command line.
Prior to 0b25cac9 ("conf: Treat --dns addresses as guest visible
addresses") it was possible to alter this with the -D/--dns option.
However, doing so was confusing and had some nonsensical edge cases because
-D generally takes guest side addresses, rather than host side addresses.
Add a new --dns-host option to restore this functionality in a more
sensible way.
Link: https://bugs.passt.top/show_bug.cgi?id=102
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Diffstat (limited to 'passt.1')
| -rw-r--r-- | passt.1 | 17 |
1 files changed, 13 insertions, 4 deletions
@@ -249,10 +249,19 @@ the host. .TP .BR \-\-dns-forward " " \fIaddr Map \fIaddr\fR (IPv4 or IPv6) as seen from guest or namespace to the -first configured DNS resolver (with corresponding IP version). Maps -only UDP and TCP traffic to port 53 or port 853. Replies are -translated back with a reverse mapping. This option can be specified -zero to two times (once for IPv4, once for IPv6). +nameserver (with corresponding IP version) specified by the +\fB\-\-dns-host\fR option. Maps only UDP and TCP traffic to port 53 or +port 853. Replies are translated back with a reverse mapping. This +option can be specified zero to two times (once for IPv4, once for +IPv6). + +.TP +.BR \-\-dns-host " " \fIaddr +Configure the host nameserver which guest or namespace queries to the +\fB\-\-dns-forward\fR address will be redirected to. This option can +be specified zero to two times (once for IPv4, once for IPv6). +By default, the first nameserver from the host's +\fI/etc/resolv.conf\fR. .TP .BR \-S ", " \-\-search " " \fIlist |