ApFree WiFiDog: A high performance captive portal solution for HTTP(s)
ApFree WiFiDog is a high performance captive portal solution for HTTP(s), which mainly used in (LEDE&Openwrt) platform.
Enhancement of apfree-wifidog
In fact, the title should be why we choose apfree-wifidog, the reason was the following:
Stable
apfree-wifidog was widely used in tens of thousands device, which were running in business scene. In order to improve its stable, we rewrite all iptables rule by api instead of fork call, which will easily cause deadlock in multithread-fork running environment. we also re-write the code and replace libhttpd (which unmaitained for years) with libevent
Performance
apfree-wifidog's http request-response is more quick, u can find statistic data in our test document
HTTPs redirect
apfree-wifidog support https redirect, in current internet environment, captive portal solution without supporting https redirect will become unsuitable gradually
More features
apfree-wifidog support mac temporary-pass, ip,domain,pan-domain,white-mac,black-mac rule and etc. all these rules can be applied without restarting wifidog
MQTT support
by enable mqtt support, u can remotely deliver such as trusted ip, domian and pan-domain rules to apfree wifidog
Compitable with wifidog protocol
u don't need to modify your wifidog authentication server to adapt apfree-wifidog; if u have pression on server-side, apfree wifidog's improved protocol can greatly relieve it, which disabled by default
Getting started
before starting apfree-wifidog, we must know how to configure it. apfree-wifidog use OpenWrt standard uci config system, all your apfree-wifidog configure information stored in /etc/confg/wifidogx, which will be parsed by /etc/init.d/wifidogx to /tmp/wifidog.conf, apfree-wifidog's real configure file is /tmp/wifidog.conf
The default apfree-wifidog UCI configuration file like this:
config wifidog
option gateway_interface 'br-lan'
option auth_server_hostname 'wifidog.kunteng.org.cn'
option auth_server_port 443
option auth_server_path '/wifidog/'
option check_interval 60
option client_timeout 5
option apple_cna 1
option thread_number 5
option wired_passed 0
option enable 0
auth_server_hostname was apfree-wifidog auth server, it can be domain or ip; wifidog.kunteng.org.cn is a free auth server we provided, it was also open source
apple_cna 1 apple captive detect deceive; 2 apple captive detect deceive to disallow portal page appear
wired_passed means whether LAN access devices need to auth or not, value 1 means no need to auth
enable means whether start apfree-wifidog when we executed
/etc/init.d/wifidogx start, if u wanted to start apfree-wifidog, you must set enable to 1 before executing/etc/init.d/wifidogx start
How to support https redirect
In order to support https redirect, apfree-wifidog need x509 pem cert and private key, u can generate youself like this:
PX5G_BIN="/usr/sbin/px5g"
OPENSSL_BIN="/usr/bin/openssl"
APFREE_CERT="/etc/apfree.crt"
APFREE_KEY="/etc/apfree.key"
generate_keys() {
local days bits country state location commonname
# Prefer px5g for certificate generation (existence evaluated last)
local GENKEY_CMD=""
local UNIQUEID=$(dd if=/dev/urandom bs=1 count=4 | hexdump -e '1/1 "%02x"')
[ -x "$OPENSSL_BIN" ] && GENKEY_CMD="$OPENSSL_BIN req -x509 -sha256 -outform pem -nodes"
[ -x "$PX5G_BIN" ] && GENKEY_CMD="$PX5G_BIN selfsigned -pem"
[ -n "$GENKEY_CMD" ] && {
$GENKEY_CMD \
-days ${days:-730} -newkey rsa:${bits:-2048} -keyout "${APFREE_KEY}.new" -out "${APFREE_CERT}.new" \
-subj /C="${country:-CN}"/ST="${state:-localhost}"/L="${location:-Unknown}"/O="${commonname:-ApFreeWiFidog}$UNIQUEID"/CN="${commonname:-ApFreeWiFidog}"
sync
mv "${APFREE_KEY}.new" "${APFREE_KEY}"
mv "${APFREE_CERT}.new" "${APFREE_CERT}"
}
}
or when u start /etc/init.d/wifidogx start, it will generate it automatically
For more information, please refer to the upstream project page