docker create pptp client using network mode bridge failed

I want to create multiple pptp client with docker, every pptp docker instance should have independent ppp network interface, so docker –network parameter must be [bridge],but i got trouble[LCP: timeout sending Config-Requests] when instance starting.

Dockerfile

FROM golang:1.9-alpine as source
MAINTAINER wlw

RUN apk add --no-cache 
            --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing/ 
            pptpclient

COPY entrypoint.sh /entrypoint.sh
RUN mkdir -p /go/src/pptp
WORKDIR /go/src/pptp
COPY . /go/src/pptp
RUN go build -o app
#RUN echo 1 > /proc/sys/net/netfilter/nf_conntrack_helper
ENTRYPOINT ["/entrypoint.sh"]

CMD ["/bin/bash"]

entrypoint.sh

#!/bin/sh
#echo  net.ipv4.ip_forward=1 /etc/sysctl.conf
echo 1 > /proc/sys/net/netfilter/nf_conntrack_helper
 modprobe nf_conntrack_pptp
cat > /etc/ppp/peers/${TUNNEL} <<_EOF_
pty "pptp ${SERVER} --nolaunchpppd"
name "${USERNAME}"
password "${PASSWORD}"
remotename PPTP
file /etc/ppp/options.pptp
ipparam "${TUNNEL}"
_EOF_

cat > /etc/ppp/ip-up <<"_EOF_"
#!/bin/sh
ip route add 0.0.0.0/1 dev $1
ip route add 128.0.0.0/1 dev $1
_EOF_

cat > /etc/ppp/ip-down <<"_EOF_"
#!/bin/sh
ip route del 0.0.0.0/1 dev $1
ip route del 128.0.0.0/1 dev $1
_EOF_
 modprobe nf_conntrack_pptp
exec pon ${TUNNEL} debug dump logfd 2 nodetach persist "[email protected]"

main.go [test pptp client ip]

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
    "time"
)

func main() {
    count := 0
    for {
        fmt.Println("count:",count)
        time.Sleep(time.Second *2)
        req, err := http.NewRequest(http.MethodGet, "http://45.40.198.155:1234", nil)
        if err != nil {
            panic(err)
        }
        res, err := http.DefaultClient.Do(req)
        if err != nil {
            panic(err)
        }
        data, err := ioutil.ReadAll(res.Body)
        fmt.Println(string(data))
    }

}

I changed centos version,and docker version, but also got the same error. By the way, centos runing on VMware Fusion,which version is 7.2,and docker version is 19.03.1

Docker run command

docker run -it  --restart always --privileged -e SERVER=hb660.3322.org -e TUNNEL=vps -e USERNAME=xe5602 -e PASSWORD=621  --network=bridge   pptp:test

Here is the log

pppd options in effect:
debug       # (from command line)
nodetach        # (from command line)
persist     # (from command line)
logfd 2     # (from command line)
dump        # (from command line)
noauth      # (from /etc/ppp/options.pptp)
refuse-pap      # (from /etc/ppp/options.pptp)
refuse-chap     # (from /etc/ppp/options.pptp)
refuse-mschap       # (from /etc/ppp/options.pptp)
refuse-eap      # (from /etc/ppp/options.pptp)
name xe5602     # (from /etc/ppp/peers/vps)
password ??????     # (from /etc/ppp/peers/vps)
remotename PPTP     # (from /etc/ppp/peers/vps)
        # (from /etc/ppp/options.pptp)
pty pptp hb660.3322.org --nolaunchpppd      # (from /etc/ppp/peers/vps)
ipparam vps     # (from /etc/ppp/peers/vps)
nobsdcomp       # (from /etc/ppp/options.pptp)
nodeflate       # (from /etc/ppp/options.pptp)
using channel 1
Using interface ppp0
Connect: ppp0 <--> /dev/pts/1
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9cb1e5f2> <pcomp> <accomp>]
LCP: timeout sending Config-Requests
Connection terminated.
Modem hangup

Source: StackOverflow