diff options
Diffstat (limited to 'passt.1')
| -rw-r--r-- | passt.1 | 63 |
1 files changed, 53 insertions, 10 deletions
@@ -165,19 +165,62 @@ Default is to use the interface with the first default route. .TP .BR \-D ", " \-\-dns " " \fIaddr -Assign IPv4 \fIaddr\fR via DHCP (option 23) or IPv6 \fIaddr\fR via NDP Router -Advertisement (option type 25) and DHCPv6 (option 23) as DNS resolver. +Use \fIaddr\fR (IPv4 or IPv6) for DHCP, DHCPv6, NDP or DNS forwarding, as +configured (see options \fB--no-dhcp-dns\fR, \fB--dhcp-dns\fR, +\fB--dns-forward\fR) instead of reading addresses from \fI/etc/resolv.conf\fR. This option can be specified multiple times, and a single, empty option disables -DNS options altogether. -In \fBpasst\fR mode, default is to use addresses from \fI/etc/resolv.conf\fR, -and, in \fBpasta\fR mode, no addresses are sent by default. +usage of DNS addresses altogether. + +.TP +.BR \-D ", " \-\-dns " " \fIaddr +Use \fIaddr\fR (IPv4 or IPv6) for DHCP, DHCPv6, NDP or DNS forwarding, as +configured (see options \fB--no-dhcp-dns\fR, \fB--dhcp-dns\fR, +\fB--dns-forward\fR) instead of reading addresses from \fI/etc/resolv.conf\fR. +This option can be specified multiple times, and a single, empty option disables +usage of DNS addresses altogether. + +.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). Mapping is limited to +UDP traffic directed to port 53, and DNS answers are translated back with a +reverse mapping. +This option can be specified zero to two times (once for IPv4, once for IPv6). + .TP .BR \-S ", " \-\-search " " \fIlist -Assign space-separated \fIlist\fR via DHCP (option 119), via NDP Router -Advertisement (option type 31) and DHCPv6 (option 24) as DNS domain search list. -A single, empty option disables sending the DNS domain search list. -In \fBpasst\fR mode, default is to use the search list from -\fI/etc/resolv.conf\fR, and, in \fBpasta\fR mode, no list is sent by default. +Use space-separated \fIlist\fR for DHCP, DHCPv6, and NDP purposes, instead of +reading entries from \fI/etc/resolv.conf\fR. See options \fB--no-dhcp-search\fR +and \fB--dhcp-search\fR. A single, empty option disables the DNS domain search +list altogether. + +.TP +.BR \-\-no-dhcp-dns " " \fIaddr +In \fIpasst\fR mode, do not assign IPv4 addresses via DHCP (option 23) or IPv6 +addresses via NDP Router Advertisement (option type 25) and DHCPv6 (option 23) +as DNS resolvers. +By default, all the configured addresses are passed. + +.TP +.BR \-\-dhcp-dns " " \fIaddr +In \fIpasta\fR mode, assign IPv4 addresses via DHCP (option 23) or IPv6 +addresses via NDP Router Advertisement (option type 25) and DHCPv6 (option 23) +as DNS resolvers. +By default, configured addresses, if any, are not passed. + +.TP +.BR \-\-no-dhcp-search " " \fIaddr +In \fIpasst\fR mode, do not send the DNS domain search list addresses via DHCP +(option 119), via NDP Router Advertisement (option type 31) and DHCPv6 (option +24). +By default, the DNS domain search list resulting from configuration is passed. + +.TP +.BR \-\-dhcp-search " " \fIaddr +In \fIpasta\fR mode, send the DNS domain search list addresses via DHCP (option +119), via NDP Router Advertisement (option type 31) and DHCPv6 (option 24). +By default, the DNS domain search list resulting from configuration is not +passed. .TP .BR \-\-no-tcp |