[strongSwan] Cannot pass the traffic through the established tunnel.

Noel Kuntze noel.kuntze+strongswan-users-ml at thermi.consulting
Thu Apr 5 18:45:53 CEST 2018

Hello Sujoy,

Do you mean to block all traffic that uses TCP port 80 ([tcp/80]), but the traffic that is protected in an established tunnel?
Or do you mean to block everything but what is protected?

Kind regards


On 04.04.2018 10:58, Sujoy wrote:
> Hi list members,
>  I am facing one issue with Strongswan for quite long time. I want to block all the traffic(http) and pass only the traffic of connected network. But after so many try, still I cannot do so. Bellow is the configuration status of the Server which is having multiple connection. It will be a big help if someone can provide any solution to this. Thanks for the support provide till now from the members.
> root at cloud:~# ipsec statusall
> Status of IKE charon daemon (strongSwan 5.6.2, Linux 4.4.0-116-generic, x86_64):
>   uptime: 19 hours, since Apr 03 18:02:13 2018
>   malloc: sbrk 2703360, mmap 0, used 570192, free 2133168
>   worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, scheduled: 12
>   loaded plugins: charon aes des rc2 sha2 sha1 md5 mgf1 random nonce x509 revocation constraints pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey sshkey pem openssl fips-prf gmp curve25519 xcbc cmac hmac curl attr kernel-netlink resolve socket-default stroke vici updown xauth-generic counters
> Listening IP addresses:
> Connections:
>       tunnel:  %any...%any  IKEv2, dpddelay=30s
>       tunnel:   local:  uses pre-shared key authentication
>       tunnel:   remote: uses pre-shared key authentication
>       tunnel:   child: === TUNNEL, dpdaction=clear
> Security Associations (2 up, 0 connecting):
>       tunnel[6]: ESTABLISHED 66 minutes ago,[X.X.X.X]...[]
>       tunnel[6]: IKEv2 SPIs: 1e596ccc27d7939a_i c459f660671c3952_r*, pre-shared key reauthentication in 101 minutes
>       tunnel[6]: IKE proposal: AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048
>       tunnel{16}:  INSTALLED, TUNNEL, reqid 3, ESP in UDP SPIs: cc167350_i c722bb0f_o
>       tunnel{16}:  AES_CBC_256/HMAC_SHA1_96, 0 bytes_i, 0 bytes_o, rekeying in 35 minutes
>       tunnel{16}:   X.X.X.X/32 ===
>       tunnel[5]: ESTABLISHED 76 minutes ago,[X.X.X.X]...[]
>       tunnel[5]: IKEv2 SPIs: 6bac8f644b19cf85_i 07c5f9254cda6720_r*, pre-shared key reauthentication in 90 minutes
>       tunnel[5]: IKE proposal: AES_CBC_256/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_2048
>       tunnel{17}:  INSTALLED, TUNNEL, reqid 3, ESP in UDP SPIs: c3015f13_i ce6ea6b8_o
>       tunnel{17}:  AES_CBC_256/HMAC_SHA1_96, 0 bytes_i, 0 bytes_o, rekeying in 36 minutes
>       tunnel{17}:   X.X.X.X/32 ===

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