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
