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Add instruction for FreeBSD

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This commit is contained in:
Ruben van Staveren 2014-07-22 20:30:52 +02:00
parent ddc1efed89
commit 36cf99697b
1 changed files with 39 additions and 1 deletions
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README.md
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@ -217,13 +217,15 @@ transparent proxying, just don't use it (or use the libcap method).
Transparent proxy support
-------------------------
On Linux (only?) you can use the `--transparent` option to
On Linux and FreeBSD you can use the `--transparent` option to
request transparent proying. This means services behind `sslh`
(Apache, `sshd` and so on) will see the external IP and ports
as if the external world connected directly to them. This
simplifies IP-based access control (or makes it possible at
all).
Linux:
`sslh` needs extended rights to perform this: you'll need to
give it `CAP_NET_ADMIN` capabilities (see appropriate chapter)
or run it as root (but don't do that).
@ -241,6 +243,42 @@ this scheme -- let me know if you manage that:
# ip rule add fwmark 0x1 lookup 100
# ip route add local 0.0.0.0/0 dev lo table 100
FreeBSD:
Given you have no firewall defined yet, you can use the following configuration
to have ipfw properly redirect traffic back to sslh
/etc/rc.conf
firewall_enable="YES"
firewall_type="open"
firewall_logif="YES"
firewall_coscripts="/etc/ipfw/sslh.rules"
/etc/ipfw/sslh.rules
#! /bin/sh
# ssl
ipfw add 20000 fwd 192.0.2.1,443 log tcp from 192.0.2.1 8443 to any out
ipfw add 20010 fwd 2001:db8::1,443 log tcp from 2001:db8::1 8443 to any out
# ssh
ipfw add 20100 fwd 192.0.2.1,443 log tcp from 192.0.2.1 8022 to any out
ipfw add 20110 fwd 2001:db8::1,443 log tcp from 2001:db8::1 8022 to any out
# xmpp
ipfw add 20200 fwd 192.0.2.1,443 log tcp from 192.0.2.1 5222 to any out
ipfw add 20210 fwd 2001:db8::1,443 log tcp from 2001:db8::1 5222 to any out
# openvpn (running on other internal system)
ipfw add 20300 fwd 192.0.2.1,443 log tcp from 198.51.100.7 1194 to any out
ipfw add 20310 fwd 2001:db8::1,443 log tcp from 2001:db8:1::7 1194 to any out
This will only work if `sslh` does not use any loopback
addresses (no `127.0.0.1` or `localhost`), you'll need to use
explicit IP addresses (or names):