Thanks for your reply Noel, Landed in my spam folder... I'm testing with a curl to a known endpoint from the vpn gateway itself and also from the associated local subnet that is accepted on the other side. Here's the output of iptables-save which has changed quite a bit over various efforts to realise throughput.
# Generated by iptables-save v1.8.4 on Mon Jul 5 09:52:05 2021 *mangle :PREROUTING ACCEPT [131559:43589022] :INPUT ACCEPT [129402:43459544] :FORWARD ACCEPT [2155:129300] :OUTPUT ACCEPT [131976:29447953] :POSTROUTING ACCEPT [134131:29577253] -A FORWARD -p tcp -m policy --dir in --pol ipsec -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1361:1536 -j TCPMSS --set-mss 1360 -A FORWARD -p tcp -m policy --dir out --pol ipsec -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1361:1536 -j TCPMSS --set-mss 1360 COMMIT # Completed on Mon Jul 5 09:52:05 2021 # Generated by iptables-save v1.8.4 on Mon Jul 5 09:52:05 2021 *nat :PREROUTING ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -m policy --dir out --pol ipsec -j ACCEPT -A POSTROUTING -s 48.138.201.64/26 -o eth0 -m policy --dir out --pol ipsec -j ACCEPT COMMIT # Completed on Mon Jul 5 09:52:05 2021 # Generated by iptables-save v1.8.4 on Mon Jul 5 09:52:05 2021 *filter :INPUT ACCEPT [42760:14832665] :FORWARD ACCEPT [774:46440] :OUTPUT ACCEPT [43602:9751014] COMMIT Cheers, Lew Lewis Shobbrook Team Lead - DevOps base2Services | The Cloud Services People T 1300 713 559 E [email protected] Lvl 21, 303 Collins St, Melbourne VIC 3000 base2services.com.au On Mon, 5 Jul 2021 at 18:19, <[email protected]> wrote: > > Hello Lew, > > How exactly are you testing the tunnel? > Also, please provide the output of iptables-save. > > Kind regards > Noel > > Am July 5, 2021 7:28:19 AM UTC schrieb Lewis Shobbrook > <[email protected]>: >> >> Hi Guys, >> I have an IKEv2 tunnel that is established and up, but I am unable to >> route any packets across it. >> All ACL's are configured to allow UDP 500,4500 & protocols 50, 51 & >> icmp to/from the non aws end. >> Local iptables are permissive with default policys ACCEPT >> Security groups also allow anything outbound and the above ports & >> protos inbound. >> Here are a few particulars typically requested ahead of time. >> ip_forward is enabled rp_filter disabled as follows... >> net.ipv4.ip_forward = 1 >> net.ipv4.conf.all.send_redirects = 0 >> net.ipv4.conf.default.send_redirects = 0 >> net.ipv4.tcp_max_syn_backlog = 1280 >> net.ipv4.icmp_echo_ignore_broadcasts = 1 >> net.ipv4.conf.all.accept_source_route = 0 >> net.ipv4.conf.all.accept_redirects = 0 >> net.ipv4.conf.all.secure_redirects = 0 >> net.ipv4.conf.all.log_martians = 1 >> net.ipv4.conf.default.accept_source_route = 0 >> net.ipv4.conf.default.accept_redirects = 0 >> net.ipv4.conf.default.secure_redirects = 0 >> net.ipv4.icmp_echo_ignore_broadcasts = 1 >> net.ipv4.icmp_ignore_bogus_error_responses = 1 >> net.ipv4.tcp_syncookies = 1 >> net.ipv4.conf.all.rp_filter = 0 >> net.ipv4.conf.default.rp_filter = 0 >> net.ipv4.tcp_mtu_probing = 1 >> >> tcpdump just shows one way requests >> Looking at the 220 rt table I can see that the auto added route >> appears to be correct, and the xfrm policy nothing obvious to me, with >> no xfrm vi's used. >> Obfuscated ip's naturally... >> ip r li ta 220 >> 198.168.248.0/29 via 48.138.201.65 dev eth0 proto static src 48.138.201.70 >> ip xfrm policy >> src 48.138.201.64/26 dst 198.168.248.0/29 >> dir out priority 371839 ptype main >> tmpl src 48.138.201.70 dst 68.169.15.170 >> proto esp spi 0x2c1e849e reqid 1 mode tunnel >> src 198.168.248.0/29 dst 48.138.201.64/26 >> dir fwd priority 371839 ptype main >> tmpl src 68.148.15.170 dst 48.138.201.70 >> proto esp reqid 1 mode tunnel >> src 198.168.248.0/29 dst 48.138.201.64/26 >> dir in priority 371839 ptype main >> tmpl src 68.148.15.170 dst 48.138.201.70 >> proto esp reqid 1 mode tunnel >> src 0.0.0.0/0 dst 0.0.0.0/0 >> socket in priority 0 ptype main >> src 0.0.0.0/0 dst 0.0.0.0/0 >> socket out priority 0 ptype main >> src 0.0.0.0/0 dst 0.0.0.0/0 >> socket in priority 0 ptype main >> src 0.0.0.0/0 dst 0.0.0.0/0 >> socket out priority 0 ptype main >> src ::/0 dst ::/0 >> socket in priority 0 ptype main >> src ::/0 dst ::/0 >> socket out priority 0 ptype main >> src ::/0 dst ::/0 >> socket in priority 0 ptype main >> src ::/0 dst ::/0 >> socket out priority 0 ptype main >> src 198.168.248.0/29 dst 48.138.201.64/26 >> dir fwd priority 371840 ptype main >> tmpl src 68.148.15.170 dst 48.138.201.70 >> proto esp reqid 2 mode tunnel >> src 198.168.248.0/29 dst 48.138.201.64/26 >> dir in priority 371840 ptype main >> tmpl src 68.148.15.170 dst 48.138.201.70 >> proto esp reqid 2 mode tunnel >> src 48.138.201.64/26 dst 198.168.248.0/29 >> dir out priority 371840 ptype main >> tmpl src 48.138.201.70 dst 68.169.15.170 >> proto esp reqid 2 mode tunnel >> >> ipsec statusall >> Status of IKE charon daemon (strongSwan 5.7.2, Linux >> 4.14.232-177.418.amzn2.x86_64, x86_64): >> uptime: 54 minutes, since Jul 05 06:10:30 2021 >> malloc: sbrk 2846720, mmap 0, used 1023696, free 1823024 >> worker threads: 11 of 16 idle, 5/0/0/0 working, job queue: 0/0/0/0, >> scheduled: 1 >> loaded plugins: charon pkcs11 tpm aesni aes des rc2 sha2 sha1 md4 >> md5 mgf1 random nonce x509 revocation constraints acert pubkey pkcs1 >> pkcs7 pkcs8 pkcs12 pgp dnskey sshkey pem openssl gcrypt fips-prf gmp >> curve25519 chapoly xcbc cmac hmac ctr ccm gcm curl attr kernel-netlink >> resolve socket-default farp stroke vici updown eap-identity eap-sim >> eap-aka eap-aka-3gpp eap-aka-3gpp2 eap-md5 eap-gtc eap-mschapv2 >> eap-dynamic eap-radius eap-tls eap-ttls eap-peap xauth-generic >> xauth-eap xauth-pam xauth-noauth dhcp led duplicheck unity counters >> Listening IP addresses: >> 48.138.201.70 >> Connections: >> tunnel1: %any...68.148.15.170 IKEv2 >> tunnel1: local: uses pre-shared key authentication >> tunnel1: remote: uses pre-shared key authentication >> tunnel1: child: 48.138.201.64/26 === 198.168.248.0/29 TUNNEL >> Security Associations (1 up, 0 connecting): >> tunnel1[2]: ESTABLISHED 24 minutes ago, >> 48.138.201.70[48.138.201.70]...65.169.15.170[65.169.15.170] >> tunnel1[2]: IKEv2 SPIs: d3e732eb14d78aec_i* b06860d1ceee2f9a_r, >> rekeying disabled >> tunnel1[2]: IKE proposal: AES_GCM_16_256/PRF_HMAC_SHA2_384/ECP_384 >> tunnel1{2}: INSTALLED, TUNNEL, reqid 2, ESP in UDP SPIs: cb651f89_i >> 479cff91_o >> tunnel1{2}: AES_GCM_16_256, 0 bytes_i, 0 bytes_o, rekeying disabled >> tunnel1{2}: 48.138.201.64/26 === 198.168.248.0/30 >> >> VPC flow logs show no proto 50, only 4500 & 500. >> I've also tried to clamp mss not that I expect it would have changed 0 >> throughput >> iptables -t mangle -A FORWARD -m policy --pol ipsec --dir in -p tcp -m >> tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1361:1536 -j TCPMSS >> --set-mss 1360 >> >> I've spent hours searching but have not found anything to help. >> Hoping someone here may have a suggestion ot two? >> Cheers, >> >> Lew > > > Sent from mobile
