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Ukubhoboza imbobo elula ye-UDP kusetshenziswa umhubhe we-IPIP njengesibonelo

Usuku oluhle!

Kulesi sihloko ngifuna ukukutshela ukuthi ngenze kanjani (eyodwa futhi) umbhalo we-Bash wokuxhuma amakhompyutha amabili atholakala ngemuva kwe-NAT esebenzisa ubuchwepheshe bokubhoboza imbobo ye-UDP esebenzisa i-Ubuntu/Debian OS njengesibonelo.

Ukusungula uxhumano kuhlanganisa izinyathelo ezimbalwa:

  1. Ukuqala i-node futhi ulinde ukuthi i-node ekude ilungele;
  2. Ukunquma ikheli le-IP langaphandle kanye nechweba le-UDP;
  3. Ukudlulisa ikheli le-IP langaphandle kanye nembobo ye-UDP kumsingathi oqhelile;
  4. Ukuthola ikheli le-IP langaphandle kanye nembobo ye-UDP kumsingathi oqhelile;
  5. Inhlangano yomhubhe we-IPIP;
  6. Ukuqapha ukuxhumana;
  7. Uma uxhumano lulahlekile, susa umhubhe we-IPIP.

Ngacabanga isikhathi eside futhi ngisacabanga ukuthi yini engasetshenziswa ukushintshanisa idatha phakathi kwama-node, elula futhi esheshayo kimi okwamanje isebenza nge-Yandex.disk.

  • Okokuqala, kulula ukuyisebenzisa - udinga izenzo ezi-3: dala, funda, susa. Nge-curl lokhu:
    Dala:

    curl -s -X MKCOL --user "$usename:$password" https://webdav.yandex.ru/$folder

    Funda:

    curl -s --user "$usename:$password" -X PROPFIND -H "Depth: 1" https://webdav.yandex.ru/$folder

    Susa:

    curl -s -X DELETE --user "$usename:$password" https://webdav.yandex.ru/$folder
  • Okwesibili, kulula ukuyifaka: 
    apt install curl

Ukuze unqume ikheli le-IP langaphandle kanye nembobo ye-UDP, sebenzisa umyalo we-stun-client:

stun stun.sipnet.ru -v -p $1 2>&1 | grep "MappedAddress"

Ukufakwa ngomyalo:

apt install stun-client

Ukuze uhlele umhubhe, amathuluzi ajwayelekile we-OS asuka kuphakheji ye-iproute2 asetshenziswa. Ikhona imigudu eminingi engaphakanyiswa kusetshenziswa izindlela ezijwayelekile (L2TPv3, GRE, njll.), kodwa ngikhethe i-IPIP ngoba idala umthwalo omncane owengeziwe ohlelweni. Ngazama i-L2TPv3 phezu kwe-UDP futhi ngadumala, ijubane lehla izikhathi ezingu-10, kodwa lokhu kungase kube imingcele ehlukahlukene ehlobene nabahlinzeki noma enye into. Njengoba umhubhe we-IPIP usebenza ezingeni le-IP, umhubhe we-FOU usetshenziselwa ukusebenza ezingeni lechweba le-UDP. Ukuze uhlele umhubhe we-IPIP udinga:

- layisha imojula ye-FOU:

modprobe fou

- lalela imbobo yendawo:

ip fou add port $localport ipproto 4

- dala umhubhe:

ip link add name fou$name type ipip remote $remoteip local $localip encap fou  encap-sport $localport encap-dport $remoteport

- phakamisa isixhumi esibonakalayo somhubhe:

ip link set up dev fou$name

- nika amakheli e-IP angaphakathi nangaphakathi akude emhubheni:

ip addr add $intIP peer $peerip dev fou$name

Susa umhubhe:

ip link del dev fou$name

ip fou del port $localport

Isimo somhubhe sigadwa ngokukhala ngezikhathi ezithile ikheli le-IP langaphakathi lomhubhe we-node ekude ngomyalo:

ping -c 1 $peerip -s 0

I-ping yezikhathi ezithile iyadingeka ngokuyinhloko ukuze kugcinwe isiteshi, ngaphandle kwalokho, lapho umhubhe ungenzi lutho, amatafula e-NAT kumarutha angase asulwe bese uxhumano luzophuka.

Uma i-ping inyamalala, khona-ke umhubhe we-IPIP uyasuswa futhi ulinde ukulungela kumsingathi oqhelile.

Iskripthi ngokwaso:

#!/bin/bash
username="[email protected]"
password="password"
folder="vpnid"
intip="10.0.0.1"
localport=`shuf -i 10000-65000 -n 1`
cid=`shuf -i 10000-99999 -n 1`
tid=`shuf -i 10-99 -n 1`
function yaread {
        curl -s --user "$1:$2" -X PROPFIND -H "Depth: 1" https://webdav.yandex.ru/$3 | sed 's/></>n</g' | grep "displayname" | sed 's/<d:displayname>//g' | sed 's/</d:displayname>//g' | grep -v $3 | grep -v $4 | sort -r
}
function yacreate {
        curl -s -X MKCOL --user "$1:$2" https://webdav.yandex.ru/$3
}
function yadelete {
        curl -s -X DELETE --user "$1:$2" https://webdav.yandex.ru/$3
}
function myipport {
        stun stun.sipnet.ru -v -p $1 2>&1 | grep "MappedAddress" | sort | uniq | awk '{print $3}' | head -n1
}
function tunnel-up {
	modprobe fou
	ip fou add port $4 ipproto 4
	ip link add name fou$7 type ipip remote $1 local $3 encap fou encap-sport $4 encap-dport $2
	ip link set up dev fou$7
	ip addr add $6 peer $5 dev fou$7
}
function tunnel-check {
	sleep 10
        pings=0
        until [[ $pings == 4 ]]; do
                if ping -c 1 $1 -s 0 &>/dev/null;
                        then    echo -n .; n=0
                        else    echo -n !; ((pings++))
                fi
		sleep 15
        done
}
function tunnel-down {
	ip link del dev fou$1
	ip fou del port $2
}
trap 'echo -e "nDisconnecting..." && yadelete $username $password $folder; tunnel-down $tunnelid $localport; echo "IPIP tunnel disconnected!"; exit 1' 1 2 3 8 9 14 15
until [[ -n $end ]]; do
    yacreate $username $password $folder
    until [[ -n $ip ]]; do
        mydate=`date +%s`
        timeout="60"
        list=`yaread $username $password $folder $cid | head -n1`
        yacreate $username $password $folder/$mydate:$cid
        for l in $list; do
                if [ `echo $l | sed 's/:/ /g' | awk {'print $1'}` -ge $(($mydate-65)) ]; then
			#echo $list
                        myipport=`myipport $localport`
                        yacreate $username $password $folder/$mydate:$cid:$myipport:$intip:$tid
                        timeout=$(( $timeout + `echo $l | sed 's/:/ /g' | awk {'print $1'}` - $mydate + 3 ))
                        ip=`echo $l | sed 's/:/ /g' | awk '{print $3}'`
                        port=`echo $l | sed 's/:/ /g' | awk '{print $4}'`
                        peerip=`echo $l | sed 's/:/ /g' | awk '{print $5}'`
			peerid=`echo $l | sed 's/:/ /g' | awk '{print $6}'`
			if [[ -n $peerid ]]; then tunnelid=$(($peerid*$tid)); fi
                fi
        done
        if ( [[ -z "$ip" ]] && [ "$timeout" -gt 0 ] ) ; then
                echo -n "!"
                sleep $timeout
        fi
    done
    localip=`ip route get $ip | head -n1 | sed 's|.*src ||' | cut -d' ' -f1`
    tunnel-up $ip $port $localip $localport $peerip $intip $tunnelid
    tunnel-check $peerip
    tunnel-down $tunnelid $localport
    yadelete $username $password $folder
    unset ip port myipport
done
exit 0

Okuguquguqukayo igama lomsebenzisi, iphasiwedi ΠΈ ifolda kufanele kufane nhlangothi zombili, kodwa ithiphu - ezahlukene, isibonelo: 10.0.0.1 futhi 10.0.0.2. Isikhathi kuma-node kumele sivunyelaniswe. Ungaqalisa iskripthi kanje:

nohup script.sh &

Ngithanda ukunakwa ukuthi umhubhe we-IPIP awuphephile ngokombono wokuthi ithrafikhi ayibethelwanga, kepha lokhu kungaxazululwa kalula kusetshenziswa i-IPsec ngaphezulu. lesi sihloko, kwakubonakala kulula futhi kuqondakala kimi.

Bengisebenzisa lesi sikripthi ukuxhuma ku-PC yomsebenzi amasonto ambalwa manje futhi angizange ngiqaphele izinkinga. Elula mayelana nokuyibeka futhi uyikhohlwe.

Mhlawumbe uzoba nokuphawula nokusikisela, ngizokujabulela ukulalela.

Бпасибо за вниманиС!

Source: www.habr.com

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