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#76 merge manpage

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Erik Ekman 2009-09-20 21:10:42 +00:00
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31
man/iodine.8
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@ -27,6 +27,10 @@ iodine, iodined \- tunnel IPv4 over DNS
.I dnstype
.B ] [-O
.I downenc
.B ] [-L
.I 0|1
.B ] [-I
.I interval
.B ]
.B [
.I nameserver
@ -70,7 +74,12 @@ iodine, iodined \- tunnel IPv4 over DNS
lets you tunnel IPv4 data through a DNS
server. This can be useful in situations where Internet access is firewalled,
but DNS queries are allowed. It needs a TUN/TAP device to operate. The
bandwidth is asymmetrical with limited upstream and up to 1 Mbit/s downstream.
bandwidth is asymmetrical,
with a measured maximum of 680 kbit/s upstream and 2.3 Mbit/s
downstream in a wired LAN test network.
Realistic sustained throughput on a Wifi network using a carrier-grade
DNS cache has been measured at some 50 kbit/s upstream and over 200 kbit/s
downstream.
.B iodine
is the client application,
.B iodined
@ -143,6 +152,26 @@ For TXT queries,
.I Raw
will provide maximum performance. This will only work if the nameserver
path is fully 8-bit-clean for responses that are assumed to be "legible text".
.TP
.B -L 0|1
Lazy-mode switch.
\-L1 (default): Use lazy mode if server supports it, for improved
performance and decreased latency.
Some DNS servers, notably the opendns.com network, appear unstable when
handling lazy mode DNS traffic and will re-order requests. If this occurs,
you will notice fluctuating response speed in interactive sessions.
The iodine client will eventually detect this and switch back to legacy
mode automatically. Use \-L0 to force running in legacy mode
(implies \-I1).
.TP
.B -I interval
Maximum interval between requests (pings) so that intermediate DNS
servers will not time out. Default is 4 in lazy mode, which will work
fine in almost all cases. Decrease if you get SERVFAIL errors in periods
without tunneled data traffic. To get absolute minimum DNS traffic,
increase well above 4 until SERVFAIL errors start to occur.
Maximum useful value is 59, since iodined will close a client's
connection after 60 seconds of inactivity.
.SS Server Options:
.TP
.B -c