Vpn

Builder：無法建構 TUN 設備

  • October 27, 2020

我嘗試使用 Strongswan Android 應用程序在伺服器和 Android 手機之間創建一個簡單的 Strongswan 連接。

我的 Android 手機資訊： Android 8.0.0使用 Samsung Experience 9.0 這是 Galaxy A5 (2017) 型號

我嘗試同時使用 4G 和 Wifi 我的 Strongswan 應用已開啟version 2.3.0，2020 年 6 月更新

我的伺服器資訊：這是一個Ubuntu 18.04最新的 VPS

我的 Strongswan 伺服器配置如下我手動下載Strongswan 5.9.0然後使用

./configure --prefix=/custompath/strongroot --disable-stroke --with-piddir=/custompath/strongroot/var/run --enable-eap-dynamic --enable-eap-mschapv2 --enable-eap-aka --enable-eap-identity --enable-md4
make
make install

我的 strongswan.conf 如下

charon {
       load_modular = yes

       plugins {

               include strongswan.d/charon/*.conf
       }
}

include strongswan.d/*.conf

我的伺服器端 swanctl.conf 如下

connections {
      server {
               pools = primary-pool-ipv4, primary-pool-ipv6
               local {
                       auth = pubkey
                       certs = <server_crt>
                       id = <server_id>
               }
               remote {
                       auth = eap-dynamic
                       id = %any
               }
               children {
                       client {
                               start_action = trap
                               local_ts = 0.0.0.0/0,::/0
                       }
               }
       }
}


secrets {
       eap-test {
               id = <user_id>
               secret = <user_password>
       }
}


pools {
   primary-pool-ipv4 {
       addrs = 127.0.0.0/8
       dns = 8.8.8.8 
   }
   primary-pool-ipv6 {
       addrs = ::/24

   }
}

伺服器以 root 身份使用以下命令啟動，並顯示這些結果

/custompath/strongroot/libexec/ipsec/charon &
/custompath/strongroot/sbin/swanctl -q


loaded certificate from '/custompath/strongroot/etc/swanctl/x509/<server_crt'
loaded certificate from '/custompath/strongroot/etc/swanctl/x509ca/<CA_crt>'
loaded rsa key from '/custompath/strongroot/etc/swanctl/private/<server_key>'
loaded eap secret 'eap-test'
no authorities found, 0 unloaded
loaded pool 'primary-pool-ipv4'
loaded pool 'primary-pool-ipv6'
successfully loaded 2 pools, 0 unloaded
loaded connection 'server'
successfully loaded 1 connections, 0 unloaded

在我的安卓手機上，我在我的 Strongswan 應用程序上使用了以下參數

Server : <server ipv4>
VPN Type : IKEv2 EAP (Username/Password)
Username : <user_id>
Password <user_password>

CA certificate : <CA_crt>

Server identity : <server_id>
Client identity : <user_id>

其他所有欄位都保留為預設值/空白值（除了 OCSP 檢查我禁用的證書，因為它是本地生成的 CA 證書，不確定它是否會在這裡產生任何影響）

在我的伺服器端，一切都設置正確（尤其是 CA 和伺服器 crt）

但是當我嘗試建立連接時，我在客戶端得到了這些日誌（因為有

[DMN] +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
[DMN] Starting IKE service (strongSwan 5.8.4, Android 8.0.0 - R16NW.A520FXXSFCTG8/2020-08-01, SM-A520F - samsung/a5y17ltexx/samsung, Linux 3.18.14-13712092-QB33307948, aarch64)
   Oct 23 16:11:53 00[LIB] loaded plugins: androidbridge charon android-log openssl fips-prf random nonce pubkey chapoly curve25519 pkcs1 pkcs8 pem xcbc hmac socket-default revocation eap-identity eap-mschapv2 eap-md5 eap-gtc eap-tls x509
[JOB] spawning 16 worker threads
[LIB] all OCSP validation disabled
[IKE] initiating IKE_SA android[15] to <server_ip>
[ENC] generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
[NET] sending packet: from <client_ip>[33144] to <server_ip>[500] (716 bytes)
[NET] received packet: from <server_ip>[500] to <client_ip>[33144] (38 bytes)
[ENC] parsed IKE_SA_INIT response 0 [ N(INVAL_KE) ]
[IKE] peer didn't accept DH group ECP_256, it requested CURVE_25519
[IKE] initiating IKE_SA android[15] to <server_ip>
[ENC] generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(REDIR_SUP) ]
[NET] sending packet: from <client_ip>[33144] to <server_ip>[500] (684 bytes)
[NET] received packet: from <server_ip>[500] to <client_ip>[33144] (273 bytes)
[ENC] parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) CERTREQ N(FRAG_SUP) N(HASH_ALG) N(CHDLESS_SUP) N(MULT_AUTH) ]
[CFG] selected proposal: IKE:AES_CBC_128/HMAC_SHA2_256_128/PRF_AES128_XCBC/CURVE_25519
[IKE] local host is behind NAT, sending keep alives
[IKE] received cert request for "C=FR, O=Test, CN=Test CA"
[IKE] sending cert request for "C=FR, O=Test, CN=Test CA"
[IKE] establishing CHILD_SA android{15}
[ENC] generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) CERTREQ IDr CPRQ(ADDR ADDR6 DNS DNS6) N(ESP_TFC_PAD_N) SA TSi TSr N(MOBIKE_SUP) N(NO_ADD_ADDR) N(MULT_AUTH) N(EAP_ONLY) N(MSG_ID_SYN_SUP) ]
[NET] sending packet: from <client_ip>[56499] to <server_ip>[4500] (480 bytes)
[NET] received packet: from <server_ip>[4500] to <client_ip>[56499] (1184 bytes)
[ENC] parsed IKE_AUTH response 1 [ IDr CERT AUTH EAP/REQ/AKA ]
[IKE] received end entity cert "C=FR, O=Test, CN=<server_id>"
[CFG]   using certificate "C=FR, O=Test, CN=<server_id>"
[CFG]   using trusted ca certificate "C=FR, O=Test, CN=Test CA"
[CFG] checking certificate status of "C=FR, O=Test, CN=<server_id>"
[CFG] certificate status is not available
[CFG]   reached self-signed root ca with a path length of 0
[IKE] authentication of 'serv' with RSA_EMSA_PKCS1_SHA2_256 successful
[IKE] server requested EAP_AKA authentication (id 0xCA)
[IKE] EAP method not supported, sending EAP_NAK
[ENC] generating IKE_AUTH request 2 [ EAP/RES/NAK ]
[NET] sending packet: from <client_ip>[56499] to <server_ip>[4500] (80 bytes)
[NET] received packet: from <server_ip>[4500] to <client_ip>[56499] (112 bytes)
[ENC] parsed IKE_AUTH response 2 [ EAP/REQ/MSCHAPV2 ]
[IKE] server requested EAP_MSCHAPV2 authentication (id 0x7A)
[ENC] generating IKE_AUTH request 3 [ EAP/RES/MSCHAPV2 ]
[NET] sending packet: from <client_ip>[56499] to <server_ip>[4500] (144 bytes)
[NET] received packet: from <server_ip>[4500] to <client_ip>[56499] (144 bytes)
[ENC] parsed IKE_AUTH response 3 [ EAP/REQ/MSCHAPV2 ]
[IKE] EAP-MS-CHAPv2 succeeded: 'Welcome2strongSwan'
[ENC] generating IKE_AUTH request 4 [ EAP/RES/MSCHAPV2 ]
[NET] sending packet: from <client_ip>[56499] to <server_ip>[4500] (80 bytes)
[NET] received packet: from <server_ip>[4500] to <client_ip>[56499] (80 bytes)
[ENC] parsed IKE_AUTH response 4 [ EAP/SUCC ]
[IKE] EAP method EAP_MSCHAPV2 succeeded, MSK established
[IKE] authentication of <user_id> (myself) with EAP
[ENC] generating IKE_AUTH request 5 [ AUTH ]
[NET] sending packet: from <client_ip>[56499] to <server_ip>[4500] (96 bytes)
[NET] received packet: from <server_ip>[4500] to <client_ip>[56499] (336 bytes)
[ENC] parsed IKE_AUTH response 5 [ AUTH CPRP(ADDR ADDR6 DNS) SA TSi TSr N(MOBIKE_SUP) N(NO_ADD_ADDR) ]
[IKE] authentication of <server_id> with EAP successful
[IKE] IKE_SA android[15] established between <client_ip>[<user_id>]...<server_ip>[<server_id>]
[IKE] scheduling rekeying in 35468s
[IKE] maximum IKE_SA lifetime 37268s
[IKE] installing DNS server 8.8.8.8
[IKE] installing new virtual IP 127.0.0.1
[IKE] installing new virtual IP ::1
[CFG] selected proposal: ESP:AES_CBC_128/HMAC_SHA2_256_128/NO_EXT_SEQ
[IKE] CHILD_SA android{15} established with SPIs d1729f20_i cded7525_o and TS 127.0.0.1/32 ::1/128 === 0.0.0.0/0 ::/0
[DMN] setting up TUN device for CHILD_SA android{15}
[LIB] builder: failed to build TUN device
[DMN] failed to setup TUN device
[IKE] peer supports MOBIKE
[IKE] deleting IKE_SA android[15] between <client_ip>[<user_id>]...<server_ip>[<server_id>]
[IKE] sending DELETE for IKE_SA android[15]
[ENC] generating INFORMATIONAL request 6 [ D ]
[NET] sending packet: from <client_ip>[56499] to <server_ip>[4500] (80 bytes)

這裡的重要線路似乎是

[LIB] builder: failed to build TUN device
[DMN] failed to setup TUN device

我只找到了關於 android 4.4 錯誤的線上資源，這裡不是這種情況，關於如何解決它的任何想法？

我沒有顯示伺服器端日誌，因為它們非常冗長，但沒有報告錯誤（如果需要，我仍然可以向您展示）。似乎伺服器從客戶端收到 DELETE 然後繼續關閉連接，從 ESTABLISHED 到 DELETING 到 DESTROYING 如下所示

[IKE] <server|8> IKE_SA server[8] state change: ESTABLISHED => DELETING
[...]
[MGR] <server|8> checkin and destroy IKE_SA server[8]
[IKE] <server|8> IKE_SA server[8] state change: DELETING => DESTROYING
[CHD] <server|8> CHILD_SA client{4} state change: INSTALLED => DESTROYING
[KNL] <server|8> deleting policy 0.0.0.0/0 === 127.0.0.1/32 out

這裡的答案是我分配的錯誤池地址。更改為

pools {
   primary-pool-ipv4 {
       addrs = 10.0.0.0/24
       dns = 8.8.8.8 
   }
   primary-pool-ipv6 {
       addrs = 2620:0:2d0:200::7/97

   }
}

正常工作

引用自：https://serverfault.com/questions/1039863

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