AWS连接UDP工作，但TCP超时

Question

我在这里有一些问题--我已经构建了一个从我的位置到AWS的L2l虚拟专用网，我可以看到隧道已经开通了，但是当我试图将我们办公室的本地域控制器连接到AWS时，我可以看到超时，但是UDP可以工作。在我的ACL上，我没有任何端口限制，所以我不知道为什么UDP工作，而不是TCP。奇怪的是，当TCP尝试连接时，我在日志中看到以下内容：

Jun 05 2019 03:54:10: %ASA-6-302013: Built inbound TCP connection 408579111 for INSIDE:10.16.10.15/65059 (10.190.0.15/65059) to INSIDE:10.20.0.115/88 (10.20.0.115/88)
Jun 05 2019 03:54:10: %ASA-6-302013: Built inbound TCP connection 408579112 for INSIDE:10.190.0.15/65059 (10.190.0.15/65059) to INSIDE:10.20.0.115/88 (10.20.0.115/88)
Jun 05 2019 03:54:10: %ASA-4-419002: Duplicate TCP SYN from INSIDE:10.190.0.15/65059 to INSIDE:10.20.0.115/88 with different initial sequence number
Jun 05 2019 03:54:10: %ASA-4-419002: Duplicate TCP SYN from INSIDE:10.190.0.15/65059 to INSIDE:10.20.0.115/88 with different initial sequence number
Jun 05 2019 03:54:10: %ASA-4-419002: Duplicate TCP SYN from INSIDE:10.190.0.15/65059 to INSIDE:10.20.0.115/88 with different initial sequence number

我看到很多重复的tcp消息，然后它最终超时了。

我的心声如下：

object network dw01
 host 10.16.10.103

object network dw01-NATLDN
 host 10.190.0.103

object network dc03
 host 10.16.10.15

object network dc03-NATLDN
 host 10.190.0.15

object-group network Amazon.LocalLDN
 network-object 10.190.0.0 255.255.255.0

object-group network Amazon-RemoteLDN
 network-object 10.20.0.0 255.255.0.0

access-list OUTSIDE_cryptomap_10 extended permit ip any object-group Amazon-RemoteLDN

access-list amznLDN-filter extended permit ip 10.20.0.0 255.255.0.0 10.190.0.0 255.255.255.0


nat (INSIDE,OUTSIDE) source static dw01 dw01-NATLDN destination static Amazon-RemoteLDN Amazon-RemoteLDN
nat (INSIDE,any) source static network dc03 dc03-NATLDN destination static Amazon-RemoteLDN Amazon-RemoteLDN


crypto ipsec ikev1 transform-set transform-amzn esp-aes esp-sha-hmac

crypto map OUTSIDE_map 15 match address OUTSIDE_cryptomap_10
crypto map OUTSIDE_map 15 set pfs group2
crypto map OUTSIDE_map 15 set peer 52.56.71.96 3.8.226.22 
crypto map OUTSIDE_map 15 set ikev1 transform-set transform-amzn
crypto map OUTSIDE_map 15 set security-association lifetime seconds 3600
crypto map OUTSIDE_map 15 set nat-t-disable

tunnel-group 52.56.71.96 type ipsec-l2l
tunnel-group 52.56.71.96 general-attributes
 default-group-policy Amazon-LDN
tunnel-group 52.56.71.96 ipsec-attributes
 ikev1 pre-shared-key 
 isakmp keepalive threshold 10 retry 10

group-policy Amazon-LDN internal
group-policy Amazon-LDN attributes
 vpn-idle-timeout none
 vpn-session-timeout none
 vpn-filter value amznLDN-filter
 vpn-tunnel-protocol ikev1 

Answer 1

我知道问题是什么，但感谢所有试图帮助我的人，所以问题在哪里。我们为AWS使用的子网是10.20.0.0/24，现在我正在检查防火墙上的路由，最后注意到

路线10.0.0.0 255.0.0.0 10.16.169.10 1

因此，由于AWS子网根据路由进入10子网，它将其抛回交换机接口，这就是为什么当我看到日志时，我看到了重复的同步消息。一旦我们将AWS IP地址更改为它工作的10个子网之外的地址。再次感谢杰西·P的帮助，非常感谢！如果你有什么问题请告诉我