Читеры=)

#include <amxmodx>

public plugin_init(){
    register_plugin("drop all HLProxy clients", "based on Zefir plugin", "1.0")
}

public client_connect(id){
    client_check(id)
}

public client_putinserver(id){
    client_check(id)
}

public client_check(id) {
    new s_hlproxy[32]
    new s_ip[32]
    new s_nick[32]

    get_user_name(id, s_nick, charsmax(s_nick))
    get_user_info(id, "_ip", s_hlproxy, charsmax(s_hlproxy))
    get_user_ip(id, s_ip, charsmax(s_ip), 0)

    if (!equal(s_hlproxy, "")){
        server_cmd("kick #%d something has gone wrong...", get_user_userid(id))
        log_amx("[HLProxy GUARD]User %s with ip %s has kicked for hlproxy", s_nick, s_ip)
    }
    return PLUGIN_CONTINUE
}