Syntax

# 必須要加 "-s" 及 "-e"

check_udp -H host -p port -s <send string> -e <expect string>

Test

./check_udp -H R.R.R.R -p 1194 -s "$38$01$00$00$00$00$00$00$00" -e ""

Config

# OpenVPN
define command{
        command_name    check_ovpn
        command_line    $USER1$/check_udp -H $HOSTADDRESS$ -p $ARG1$ -s "$38$01$00$00$00$00$00$00$00" -e "" -M ok
        }

P.S.

使用 "-M ok" 即是有回答已經算 "ok" (M=mismatch), 不會對比回應的內容"-e"