Strongswan zu strongswan psk ikev2 site to site: Unterschied zwischen den Versionen

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Zeile 1: Zeile 1:
  
  
−
=Konfiguration=
 
 
==ipsec.conf==
 
==ipsec.conf==
 
===Erklärung===
 
===Erklärung===
 
*/etc/[[ipsec.conf Erklärung]]
 
*/etc/[[ipsec.conf Erklärung]]
 
===Datei===
 
===Datei===
 +
[[Datei:Ikev2-prinzip.png|900px]]
 
<pre>
 
<pre>
 
conn s2s
 
conn s2s
 
     authby=secret
 
     authby=secret
 
     keyexchange=ikev2
 
     keyexchange=ikev2
−
     left=10.82.227.12
+
     left=10.81.1.10
−
     leftsubnet=10.82.243.0/24
+
     leftsubnet=192.168.10.0/24
 
     mobike=no
 
     mobike=no
−
     right=10.82.227.22
+
     right=10.81.1.11
−
     rightsubnet=10.82.244.0/24
+
     rightsubnet=192.168.11.0/24
 
     ike=aes256-sha256-modp4096!
 
     ike=aes256-sha256-modp4096!
 
     esp=aes256-sha256-modp4096!
 
     esp=aes256-sha256-modp4096!
Zeile 23: Zeile 23:
 
;ID Kombination mit Authentifizierungsmethodes
 
;ID Kombination mit Authentifizierungsmethodes
 
*cat /etc/ipsec.secrets
 
*cat /etc/ipsec.secrets
−
  10.82.227.12 10.82.227.22 : PSK "suxer"
+
  10.81.1.10 10.81.1.11 : PSK "suxer"
  
 
=Handling=
 
=Handling=
 
=Up=
 
=Up=
 
*ipsec up  s2s
 
*ipsec up  s2s
−
<pre>
 
−
initiating IKE_SA s2s[2] to 10.82.227.22
 
−
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) ]
 
−
sending packet: from 10.82.227.12[500] to 10.82.227.22[500] (720 bytes)
 
−
received packet: from 10.82.227.22[500] to 10.82.227.12[500] (728 bytes)
 
−
parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(FRAG_SUP) N(HASH_ALG) N(CHDLESS_SUP) N(MULT_AUTH) ]
 
−
selected proposal: IKE:AES_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_4096
 
−
authentication of '10.82.227.12' (myself) with pre-shared key
 
−
establishing CHILD_SA s2s{2}
 
−
generating IKE_AUTH request 1 [ IDi N(INIT_CONTACT) IDr AUTH SA TSi TSr N(MULT_AUTH) N(EAP_ONLY) N(MSG_ID_SYN_SUP) ]
 
−
sending packet: from 10.82.227.12[500] to 10.82.227.22[500] (256 bytes)
 
−
received packet: from 10.82.227.22[500] to 10.82.227.12[500] (224 bytes)
 
−
parsed IKE_AUTH response 1 [ IDr AUTH SA TSi TSr N(AUTH_LFT) ]
 
−
authentication of '10.82.227.22' with pre-shared key successful
 
−
IKE_SA s2s[2] established between 10.82.227.12[10.82.227.12]...10.82.227.22[10.82.227.22]
 
−
scheduling reauthentication in 10119s
 
−
maximum IKE_SA lifetime 10659s
 
−
selected proposal: ESP:AES_CBC_256/HMAC_SHA2_256_128/NO_EXT_SEQ
 
−
CHILD_SA s2s{2} established with SPIs cc16cb02_i c89d755d_o and TS 10.82.243.0/24 === 10.82.244.0/24
 
−
connection 's2s' established successfully
 
−
</pre>
 
  
 
=Down=
 
=Down=
 
*ipsec down s2s
 
*ipsec down s2s
−
<pre>
 
−
deleting IKE_SA s2s[2] between 10.82.227.12[10.82.227.12]...10.82.227.22[10.82.227.22]
 
−
sending DELETE for IKE_SA s2s[2]
 
−
generating INFORMATIONAL request 2 [ D ]
 
−
sending packet: from 10.82.227.12[500] to 10.82.227.22[500] (80 bytes)
 
−
received packet: from 10.82.227.22[500] to 10.82.227.12[500] (80 bytes)
 
−
parsed INFORMATIONAL response 2 [ ]
 
−
IKE_SA deleted
 
−
IKE_SA [2] closed successfully
 
−
 
−
</pre>
 
  
 
=Status=
 
=Status=
Zeile 71: Zeile 39:
 
           s2s{4}:  10.82.243.0/24 === 10.82.244.0/24
 
           s2s{4}:  10.82.243.0/24 === 10.82.244.0/24
 
=TCPDump der Verbindung=
 
=TCPDump der Verbindung=
−
*tcpdump -ni eth0 port 500 or  esp  
+
*tcpdump -ni eth0 port 500 or  esp
−
;up
 
−
<pre>
 
−
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
 
−
listening on eth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
 
−
listening on eth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes
 
−
09:03:46.060570 IP 10.82.227.12.500 > 10.82.227.22.500: isakmp: parent_sa ikev2_init[I]
 
−
09:03:46.173147 IP 10.82.227.22.500 > 10.82.227.12.500: isakmp: parent_sa ikev2_init[R]
 
−
09:03:46.230911 IP 10.82.227.12.500 > 10.82.227.22.500: isakmp: child_sa  ikev2_auth[I]
 
−
09:03:46.234449 IP 10.82.227.22.500 > 10.82.227.12.500: isakmp: child_sa  ikev2_auth[R]
 
−
 
 
−
</pre>
 
−
down
 
−
<pre>
 
−
09:04:02.224802 IP 10.82.227.12.500 > 10.82.227.22.500: isakmp: child_sa  inf2[I]
 
−
09:04:02.228834 IP 10.82.227.22.500 > 10.82.227.12.500: isakmp: child_sa  inf2[R]
 
−
</pre>
 
  
 
=Mehrere Subnetze=
 
=Mehrere Subnetze=
Zeile 96: Zeile 48:
 
     authby=secret
 
     authby=secret
 
     keyexchange=ikev2
 
     keyexchange=ikev2
−
     left=10.82.227.12
+
     left=10.81.1.10
−
    leftid=10.82.227.12
+
     leftsubnet=192.168.10.0/24
−
     leftsubnet=10.82.243.0/24,192.168.20.0/24
 
 
     mobike=no
 
     mobike=no
−
     right=10.82.227.22
+
     right=10.81.1.11
−
     rightid=10.82.227.22
+
     rightsubnet=192.168.11.0/24,192.168.33.0/24
−
    rightsubnet=10.82.244.0/24
 
 
     ike=aes256-sha256-modp4096!
 
     ike=aes256-sha256-modp4096!
 
     esp=aes256-sha256-modp4096!
 
     esp=aes256-sha256-modp4096!
Zeile 108: Zeile 58:
 
</pre>
 
</pre>
 
*ipsec status
 
*ipsec status
−
<pre>
 
−
Security Associations (1 up, 0 connecting):
 
−
        s2s[2]: ESTABLISHED 5 seconds ago, 10.82.227.12[10.82.227.12]...10.82.227.22[10.82.227.22]
 
−
        s2s{2}:  INSTALLED, TUNNEL, reqid 1, ESP SPIs: cda686f1_i c7f9fce6_o
 
−
        s2s{2}:  10.82.243.0/24 192.168.20.0/24 === 10.82.244.0/24
 
−
</pre>
 
  
 
=Links=
 
=Links=
 
*https://www.heise.de/security/artikel/Einfacher-VPN-Tunnelbau-dank-IKEv2-270056.html
 
*https://www.heise.de/security/artikel/Einfacher-VPN-Tunnelbau-dank-IKEv2-270056.html

Aktuelle Version vom 10. September 2023, 11:37 Uhr


ipsec.conf

Erklärung

Datei

Ikev2-prinzip.png 

conn s2s
     authby=secret
     keyexchange=ikev2
     left=10.81.1.10
     leftsubnet=192.168.10.0/24
     mobike=no
     right=10.81.1.11
     rightsubnet=192.168.11.0/24
     ike=aes256-sha256-modp4096!
     esp=aes256-sha256-modp4096!
     auto=start

ipsec.secrets

ID Kombination mit Authentifizierungsmethodes
  • cat /etc/ipsec.secrets
10.81.1.10 10.81.1.11  : PSK "suxer"

Handling

Up

  • ipsec up s2s

Down

  • ipsec down s2s

Status

  • ipsec status s2s
Security Associations (1 up, 0 connecting):
         s2s[4]: ESTABLISHED 7 seconds ago, 10.82.227.12[10.82.227.12]...10.82.227.22[10.82.227.22]
         s2s{4}:  INSTALLED, TUNNEL, reqid 1, ESP SPIs: cef198fc_i c4de821a_o
         s2s{4}:   10.82.243.0/24 === 10.82.244.0/24

TCPDump der Verbindung

  • tcpdump -ni eth0 port 500 or esp

Mehrere Subnetze

alice und tiazel

  • /etc/ipsec.conf
conn s2s
     authby=secret
     keyexchange=ikev2
     left=10.81.1.10
     leftsubnet=192.168.10.0/24
     mobike=no
     right=10.81.1.11
     rightsubnet=192.168.11.0/24,192.168.33.0/24
     ike=aes256-sha256-modp4096!
     esp=aes256-sha256-modp4096!
     auto=start
  • ipsec status

Links

Abgerufen von „http://wiki.ixheim.de/index.php?title=Strongswan_zu_strongswan_psk_ikev2_site_to_site&oldid=49237“