IPSec tunnel - No traffic

Grimson

Might be a shot into the dark, but what are your firewall rules for IPsec? Did you add rules for the new tunnels?

stephenw10

Ok so that target may not respond to pings or is blocked etc but did you see 10 packets on the Phase 2 status outbound?

Traffic from the firewall itself should always be allowed out across the tunnel. Unless you have specific blocking 'OUT' floating rules.

Steve

bpados

at this point for testing I have a very open rule set on both ends.
As for traffic It doesn't even display the phase2 for ipsec tunnels

stephenw10

Your screenshot above shows the Phase 2 as established but the traffic counters show 0 packets in or out. After running that ping it should show 10 packets out.

Steve

bpados

I know but it doesn't.

Derelict

Please run the ping test again and post another shot of Status > IPsec with the phase 2 expanded. Thanks.

sgw

@derelict
another thread-hijacker here:
I see issues on a tunnel between my 2.4.4 SG-1000 and a remote SG-3100 on 2.4.3-p1 still.

tunnel comes up, no traffic goes through .. no ping via shell, nothing seen in Status page.

disabled that new async-option, checked and upgraded strongswan (on SG-1000), re-saved tunnel configs, restarted IPSEC ... I will disable other tunnels and check back with a screenshot or so.

Derelict

If you know you're hijacking why not just start another thread?

sgw

@derelict said in IPSec tunnel - No traffic:

If you know you're hijacking why not just start another thread?

because it might be the same issue/bug and it will be easier to search for that ... ? sorry

sgw

ipsec statusall
Status of IKE charon daemon (strongSwan 5.7.1, FreeBSD 11.2-RELEASE-p3, arm):
  uptime: 59 seconds, since Nov 13 19:49:59 2018
  worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, scheduled: 5
  loaded plugins: charon unbound aes des blowfish rc2 sha2 sha1 md4 md5 random nonce x509 revocation constraints pubkey pkcs1 pkcs7 pkcs8 pkcs12 pgp dnskey sshkey ipseckey pem openssl fips-prf curve25519 xcbc cmac hmac curl attr kernel-pfkey kernel-pfroute resolve socket-default stroke vici updown eap-identity eap-sim eap-md5 eap-mschapv2 eap-dynamic eap-radius eap-tls eap-ttls eap-peap xauth-generic xauth-eap whitelist addrblock counters
Listening IP addresses:
  62.40.171.237
  172.32.99.254
  2001:470:6f:333::1
  172.32.99.97
  192.168.100.1
  2001:470:6e:333::2
  172.31.91.1
Connections:
   bypasslan:  %any...%any  IKEv1/2
   bypasslan:   local:  uses public key authentication
   bypasslan:   remote: uses public key authentication
   bypasslan:   child:  172.32.99.0/24|/0 2001:470:6f:333::/64|/0 === 172.32.99.0/24|/0 2001:470:6f:333::/64|/0 PASS
    con13000:  62.40.171.237...89.221.HIDDEN.IP  IKEv2, dpddelay=10s
    con13000:   local:  [62.40.171.237] uses pre-shared key authentication
    con13000:   remote: [89.221.HIDDEN.IP] uses pre-shared key authentication
    con13000:   child:  172.32.99.0/24|/0 === 172.20.95.0/24|/0 TUNNEL, dpdaction=restart
Shunted Connections:
   bypasslan:  172.32.99.0/24|/0 2001:470:6f:333::/64|/0 === 172.32.99.0/24|/0 2001:470:6f:333::/64|/0 PASS
Routed Connections:
    con13000{1}:  ROUTED, TUNNEL, reqid 1
    con13000{1}:   172.32.99.0/24|/0 === 172.20.95.0/24|/0
Security Associations (1 up, 0 connecting):
    con13000[1]: ESTABLISHED 33 seconds ago, 62.40.171.237[62.40.171.237]...89.221.HIDDEN.IP[89.221.HIDDEN.IP]
    con13000[1]: IKEv2 SPIs: c7032e2b0033885b_i* 6f31cd51da0db2d3_r, pre-shared key reauthentication in 7 hours
    con13000[1]: IKE proposal: AES_CBC_256/HMAC_SHA2_256_128/PRF_HMAC_SHA2_256/MODP_2048
    con13000{2}:  INSTALLED, TUNNEL, reqid 1, ESP in UDP SPIs: c4103760_i cc791808_o
    con13000{2}:  AES_CBC_256/HMAC_SHA2_256_128, 0 bytes_i (0 pkts, 33s ago), 0 bytes_o (0 pkts, 33s ago), rekeying in 44 minutes
    con13000{2}:   172.32.99.0/24|/0 === 172.20.95.0/24|/0

I masked the WAN-IP of the SG-3100 ... looks good to me aside from traffic going through.
Same tunnel worked already earlier today ... I can log in to the SG-3100, ping to WAN is fine.

Derelict

The only bug in play is what looks like issues in the async crypto in yet-to-be-identified edge cases.

Everything else is almost certainly misconfiguration.

Derelict

Looks fine. How are you testing?

Did you install any policy routing on the LAN rules?

sgw

@derelict no, I did not. So far I ping from pfsense and my system behind.
You know what? Now that I stopped IPSEC completely after disabling everything execpt that one tunnel ... waited some minutes and started the IPSEC service again, it starts pinging again.
I will monitor this for the next few days .. Thanks so far.

Derelict

When you ping from pfSense you have to be sure to source it from something interesting to IPsec. Use the -S flag or the Source address pulldown in Diagnostics > Ping.

sgw

@derelict said in IPSec tunnel - No traffic:

When you ping from pfSense you have to be sure to source it from something interesting to IPsec. Use the -S flag or the Source address pulldown in Diagnostics > Ping.

will do, thanks. So far I mostly tested from my laptop (within LAN).

sgw

To be fair and maybe even help others here additional information:

It turned out that my local docker-installation sometimes used a subnet 172.20.0.0/16 that overlapped the subnet behind the pfsense-IPSEC-tunnel to my customer. So this lead to routing tables on my local machine pointing "somewhere else". The IPSEC-tunnel was working all the time. Thanks anyway.

Derelict

Thanks for coming back with the note.