[strongSwan] IPv6 Remote Access
Dusan Ilic
dusan at comhem.se
Tue May 30 11:57:54 CEST 2017
Okey, I found the issue. The Linux kernel modules for IPsec IPv6 were
not loaded as I haven't used them before. Loaded them now and it works.
Den 2017-05-29 kl. 08:41, skrev dusan at comhem.se:
> Hi Noel,
>
> I have tried both command "ping" and "ping6". I can ping other local hosts and external IPv6-adresses with "ping6".
> Unfortunately command "iptables6-save" and " sysctl -A | grep net.ipv6.conf.*forwarding" doesn't work on my Linux router (not found), but here are "ip6tables -L -v".
>
> # ip6tables -L -v
> Chain INPUT (policy DROP 0 packets, 0 bytes)
> pkts bytes target prot opt in out source destination
> 0 0 DROP all any any anywhere anywhere rt type:0 segsleft:0
> 80 12467 ACCEPT all any any anywhere anywhere state RELATED,ESTABLISHED
> 0 0 ACCEPT ipv6-nonxt any any anywhere anywhere length 40
> 0 0 shlimit tcp br0 any anywhere anywhere tcp dpt:ssh state NEW
> 14952 1175K ACCEPT all br0 any anywhere anywhere
> 0 0 ACCEPT all lo any anywhere anywhere
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp destination-unreachable
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp packet-too-big
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp time-exceeded
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp parameter-problem
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp echo-request
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp echo-reply
> 522 37584 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 130
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 131
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 132
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp router-solicitation
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp router-advertisement
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp neighbour-solicitation
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp neighbour-advertisement
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 141
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 142
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 143
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 148
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 149
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 151
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 152
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmptype 153
> 0 0 logaccept tcp any any anywhere anywhere tcp dpt:webcache
>
> Chain FORWARD (policy DROP 0 packets, 0 bytes)
> pkts bytes target prot opt in out source destination
> 0 0 all vlan847 any 2001:2002:5ae1:c206:5076:327e:xxx:xxx/128 anywhere
> 0 0 DROP all any any anywhere anywhere rt type:0 segsleft:0
> 0 0 ACCEPT all br0 br0 anywhere anywhere
> 0 0 ACCEPT all br1 br1 anywhere anywhere
> 0 0 ACCEPT all br2 br2 anywhere anywhere
> 410 21787 DROP all any any anywhere anywhere state INVALID
> 154K 98M ACCEPT all any any anywhere anywhere state RELATED,ESTABLISHED
> 0 0 DROP all 6rd 6rd anywhere anywhere
> 0 0 ACCEPT ipv6-nonxt any any anywhere anywhere length 40
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp destination-unreachable
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp packet-too-big
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp time-exceeded
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp parameter-problem
> 4620 241K logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp echo-request
> 0 0 logaccept ipv6-icmp any any anywhere anywhere ipv6-icmp echo-reply
> 0 0 ACCEPT ipv6-crypt 6rd any anywhere anywhere
> 0 0 ACCEPT udp 6rd any anywhere anywhere udp dpt:500
> 6246 1012K wanin all 6rd any anywhere anywhere
> 5040 646K wanout all any 6rd anywhere anywhere
> 5040 646K ACCEPT all br0 any anywhere anywhere
> 0 0 ACCEPT all br1 any anywhere anywhere
> 0 0 ACCEPT all br2 any anywhere anywhere
> 0 0 ACCEPT all br0 6rd anywhere anywhere
> 0 0 ACCEPT all br1 6rd anywhere anywhere
> 0 0 ACCEPT all br2 6rd anywhere anywhere
>
> Chain OUTPUT (policy ACCEPT 3 packets, 363 bytes)
> pkts bytes target prot opt in out source destination
> 0 0 DROP all any any anywhere anywhere rt type:0 segsleft:0
>
> Chain logaccept (30 references)
> pkts bytes target prot opt in out source destination
> 4769 253K LOG all any any anywhere anywhere state NEW limit: avg 1/sec burst 5 LOG level warning tcp-sequence tcp-options ip-options macdecode prefix "ACCEPT "
> 5306 292K ACCEPT all any any anywhere anywhere
>
> Chain logdrop (0 references)
> pkts bytes target prot opt in out source destination
> 0 0 LOG all any any anywhere anywhere state NEW limit: avg 1/sec burst 5 LOG level warning tcp-sequence tcp-options ip-options macdecode prefix "DROP "
> 0 0 DROP all any any anywhere anywhere
>
> Chain logreject (0 references)
> pkts bytes target prot opt in out source destination
> 0 0 LOG all any any anywhere anywhere limit: avg 1/sec burst 5 LOG level warning tcp-sequence tcp-options ip-options macdecode prefix "REJECT "
> 0 0 REJECT tcp any any anywhere anywhere reject-with tcp-reset
>
> Chain shlimit (1 references)
> pkts bytes target prot opt in out source destination
> 0 0 all any any anywhere anywhere recent: SET name: shlimit side: source
> 0 0 DROP all any any anywhere anywhere recent: UPDATE seconds: 60 hit_count: 4 name: shlimit side: source
>
> Chain wanin (1 references)
> pkts bytes target prot opt in out source destination
>
> Chain wanout (1 references)
> pkts bytes target prot opt in out source destination
>
> # ipsec statusall vpn-ipv6
> Status of IKE charon daemon (strongSwan 5.5.1, Linux 2.6.36.4brcmarm, armv7l):
> uptime: 11 hours, since May 28 18:35:50 2017
> malloc: sbrk 831488, mmap 0, used 416048, free 415440
> worker threads: 10 of 16 idle, 6/0/0/0 working, job queue: 0/0/0/0, scheduled: 13
> loaded plugins: charon test-vectors ldap pkcs11 aes des blowfish rc2 sha2 sha1 md4 md5 random nonce x509 revocation constraints pubkey pkcs1 pkcs8 pgp dnskey sshkey pem openssl gcrypt fips-prf gmp gmpdh agent xcbc cmac hmac ctr ccm gcm curl mysql sqlite attr kernel-netlink resolve socket-default socket-dynamic farp stroke smp updown eap-identity eap-md5 eap-mschapv2 eap-radius xauth-generic xauth-eap dhcp whitelist led duplicheck addrblock unity
> Listening IP addresses:
> 85.24.xx.xx
> 2001:2002:5ae1:xxx::xx
> Connections:
> vpn-ipv6: %any...%any IKEv2, dpddelay=300s
> vpn-ipv6: local: [vpn.joksi.net] uses public key authentication
> vpn-ipv6: remote: uses EAP_MSCHAPV2 authentication with EAP identity 'dulemis3'
> vpn-ipv6: child: 2000::/3 === dynamic TUNNEL, dpdaction=clear
> Security Associations (4 up, 0 connecting):
> vpn-ipv6[26]: ESTABLISHED 2 minutes ago, 85.24.xx.xx[x]...94.234.xx.xx[x]
> vpn-ipv6[26]: IKEv2 SPIs: a7ac5d658a4a39ac_i 278aaa324f402aaa_r*, public key reauthentication in 2 hours
> vpn-ipv6[26]: IKE proposal: AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_3072
> vpn-ipv6{1622}: INSTALLED, TUNNEL, reqid 6, ESP in UDP SPIs: c9edd06c_i 66f8c36e_o
> vpn-ipv6{1622}: AES_CBC_128/HMAC_SHA2_256_128, 11600 bytes_i, 0 bytes_o, rekeying in 39 minutes
> vpn-ipv6{1622}: 2000::/3 === 2001:2002:5ae1:c206:5076:327e:xx:xx/128
>
> conn vpn-ikev2
> auto=add
> reauth=yes
> dpdaction=clear
> dpddelay=300s
> mobike=yes
>
> leftid=xxx
> leftsubnet=0.0.0.0/0,2000::/3
> leftauth=pubkey
>
> right=%any
> rightsubnet=%dynamic
> rightsourceip=%dhcp,2001:2002:5ae1:c206:5076:327e:xxx:xxx
> rightauth=eap-mschapv2
>
> eap_identity=%any
>
>> ----Ursprungligt meddelande----
>> Från : noel.kuntze+strongswan-users-ml at thermi.consulting
>> Datum : 29/05/2017 - 00:16 (V)
>> Till : dusan at comhem.se, users at lists.strongswan.org
>> Ämne : Re: [strongSwan] IPv6 Remote Access
>>
>> Hello Dusan,
>>
>> On 28.05.2017 19:24, Dusan Ilic wrote:
>>> Hi Noel,
>>>
>>> The IPv6 prefix is on link so I've tried adding static NDP record, when pinging from a local host before adding the static record it says "destination host unreacable", but after adding it it says "request timed out".
>>>
>>> When i try pinging the client from the strongswan host i get the following error?
>>> ping6: sendto: Address family not supported by protocol
>> What command are you trying to use?
>>
>>> Strongswan now added a route for the IPv6 adress out the correct WAN-interface, and I have added an input and forward rule in ip6tables accepting traffic. I can see in "ipsec statusall" that the incoming packet counter are increasing, but not the outgoing.
>> Provide `ip6tables-save`, your ipsec.conf, `ipsec statusall` and `sysctl -A | grep net.ipv6.conf.*forwarding`.
>>
>> Kind regards
>>
>> Noel
>>
>>>
>>> Den 2017-05-26 kl. 17:47, skrev Noel Kuntze:
>>>> Hello Dusan,
>>>>
>>>> On 26.05.2017 16:52, Dusan Ilic wrote:
>>>>> Hi everyone,
>>>>>
>>>>> My ISP have just recently enabled IPv6 in their network (well, 6RD aactually) and I have it confiogured and working at the site.
>>>>> I would now also like to enable it on my remote access VPN in Strongswan too, so I made a try with the following config however it doesnt seem work. According to Strongswan log the client asks for ipv6 (Android in this case) and get's assigned one (global from my public prefix).
>>>>>
>>>>> leftsubnet=0.0.0.0/0,2000::/3 (also tried with ::/0)
>>>>> rightsourceip=%dhcp,2001:2002:5ae1:c206:4466:d122:xxx:xxx
>>>>>
>>>>> This is a test, so that's why Im only assigning one single IPv6 adress for the time being. IPv4 works as expected, but I can't neither reach an IPv6 internet site nor ping the gateway or the Android client from the gateway/clients behind the gateway.
>>>> Check if the IPv6 packets make it to the strongSwan host. And then make sure those IPv6 addresses are routed over the strongSwan host. If the subnet they're from is on the link,
>>>> you'll need to create do proxy NDP on the strongSwan host with either static records in the NDP table on the strongSwan host or by using and configuring ndppd[1] on the strongSwan host.
>>>>> What I'm reacting on is that a route gets created for the IPv4 adress in my routing table, but none for the IPv6 adress. Also checked with "ip -6 route".
>>>>> Is this a routing problem possibly, or maybe an firewall (iptables) problem?
>>>> The latter maybe. IPv6 traffic goes through ip6tables, not iptables.
>>>>
>>>>> Just to be clear, the client is connecting to the Strongswan server with IPv4, should receive an IPv6 global adress inside the tunnel and then my Strongswan server should route it out on the internet (through the 6RD-tunnel).
>>>>>
>>>> Read the FAQ[2], too.
>>>>
>>>> Kind regards
>>>>
>>>> Noel
>>>>
>>>> [1] https://github.com/DanielAdolfsson/ndppd
>>>> [2] https://wiki.strongswan.org/projects/strongswan/wiki/FAQ#IPsec-and-iptablesnftables
>>>>
>>>>
>>>>
>>
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