简介
本文档介绍与思科安全防火墙集成SecureX（7.1及更早版本）相关的问题。
先决条件
要求
建议掌握下列主题的相关知识：
- Firepower Management Center (FMC)
- 思科安全防火墙
- 映像的可选虚拟化
使用的组件
- 思科安全防火墙- 6.5
- Firepower管理中心(FMC) - 6.5
- 安全服务交换(SSE)
- SecureX
- 智能许可证门户
- 思科威胁响应(CTR)
本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。
故障排除
检测连接问题
您可以从 action_queue.log 文件检测通用连接问题。如果失败，您可以看到文件中存在此类日志：
ActionQueueScrape pl[19094]: [SF::SSE::Enrollment] canConnect: System (/usr/bin/curl -s --connect-timeout 10 -m 20 -L --max-redirs 5 --max-filesize 104857600 --capath /ngfw/etc/sf/keys/fireamp/thawte_roots -f https://api.eu.sse.itd.cisco.com/providers/sse/api/v1/regions) Failed, curl returned 28 at /ngfw/usr/local/sf/lib/perl/5.10.1/SF/System.pmline 10477.
在本例中，代码28表示操作超时并检查与Internet的连接。
并且还有代码6，它意味着DNS解析出问题
域名服务器(DNS)解析引起的连接问题
步骤1:检查连接是否工作正常。
root@ftd01:~# curl -v -k https://api-sse.cisco.com
* Rebuilt URL to: https://api-sse.cisco.com/
* getaddrinfo(3) failed for api-sse.cisco.com:443
* Couldn't resolve host 'api-sse.cisco.com'
* Closing connection 0
curl: (6) Couldn't resolve host 'api-sse.cisco.com'
输出显示设备无法解析URL 。
在这种情况下，请验证是否配置了正确的DNS服务器。可以通过专家级CLI中的 nslookup 进行验证：
root@ftd01:~# nslookup api-sse.cisco.com
;; connection timed out; no servers could be reached
输出显示未到达已配置的DNS。要确认DNS设置，请使用 show network 命令：
> show network
===============[ System Information ]===============
Hostname : ftd01
DNS Servers : x.x.x.10
Management port : 8305
IPv4 Default route
Gateway : x.x.x.1
======================[ eth0 ]======================
State : Enabled
Link : Up
Channels : Management & Events
Mode : Non-Autonegotiation
MDI/MDIX : Auto/MDIX
MTU : 1500
MAC Address : x:x:x:x:9D:A5
----------------------[ IPv4 ]----------------------
Configuration : Manual
Address : x.x.x.27
Netmask : 255.255.255.0
Broadcast : x.x.x.255
----------------------[ IPv6 ]----------------------
Configuration : Disabled
===============[ Proxy Information ]================
State : Disabled
Authentication : Disabled
在本示例中，使用了错误的DNS服务器。使用以下命令更改DNS设置：
> configure network dns x.x.x.11
之后，可以再次测试连接。这次连接成功。
root@ftd01:~# curl -v -k https://api-sse.cisco.com
* Rebuilt URL to: https://api-sse.cisco.com/
* Trying x.x.x.66...
* Connected to api-sse.cisco.com (x.x.x.66) port 443 (#0)
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
* CAfile: none
CApath: /etc/ssl/certs
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Request CERT (13):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Certificate (11):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS change cipher, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use http/1.1
* Server certificate:
* subject: C=US; ST=California; L=San Jose; O=Cisco Systems, Inc.; CN=api -sse.cisco.com
* start date: 2019-12-03 20:57:56 GMT
* expire date: 2021-12-03 21:07:00 GMT
* issuer: C=US; O=HydrantID (Avalanche Cloud Corporation); CN=HydrantID S SL ICA G2
* SSL certificate verify result: self signed certificate in certificate c hain (19), continuing anyway.
> GET / HTTP/1.1
> Host: api-sse.cisco.com
> User-Agent: curl/7.44.0
> Accept: */*
>
< HTTP/1.1 403 Forbidden
< Date: Wed, 08 Apr 2020 01:27:55 GMT
< Content-Type: text/plain; charset=utf-8
< Content-Length: 9
< Connection: keep-alive
< Keep-Alive: timeout=5
< ETag: "5e17b3f8-9"
< Cache-Control: no-store
< Pragma: no-cache
< Content-Security-Policy: default-src 'self'
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< Strict-Transport-Security: max-age=31536000; includeSubdomains;
SSE门户注册问题
FMC和 Cisco Secure Firewall 都需要在其管理界面上连接到SSE URL。
要测试连接，请在具有root访问权限的 Firepower CLI 上输入以下命令：
curl -v https://api-sse.cisco.com/providers/sse/services/registration/api/v2/clients --cacert /ngfw/etc/ssl/connectorCA.pem
curl -v https://est.sco.cisco.com --cacert /ngfw/etc/ssl/connectorCA.pem
curl -v https://eventing-ingest.sse.itd.cisco.com --cacert /ngfw/etc/ssl/connectorCA.pem
curl -v https://mx01.sse.itd.cisco.com --cacert /ngfw/etc/ssl/connectorCA.pem
使用以下命令可绕过证书检查：
root@ftd01:~# curl -v -k https://api-sse.cisco.com
* Rebuilt URL to: https://api-sse.cisco.com/
* Trying x.x.x.66...
* Connected to api-sse.cisco.com (x.x.x.66) port 443 (#0)
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
* CAfile: none
CApath: /etc/ssl/certs
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Request CERT (13):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Certificate (11):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS change cipher, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use http/1.1
* Server certificate:
* subject: C=US; ST=California; L=San Jose; O=Cisco Systems, Inc.; CN=api -sse.cisco.com
* start date: 2019-12-03 20:57:56 GMT
* expire date: 2021-12-03 21:07:00 GMT
* issuer: C=US; O=HydrantID (Avalanche Cloud Corporation); CN=HydrantID S SL ICA G2
* SSL certificate verify result: self signed certificate in certificate c hain (19), continuing anyway.
> GET / HTTP/1.1
> Host: api-sse.cisco.com
> User-Agent: curl/7.44.0
> Accept: */*
>
< HTTP/1.1 403 Forbidden
< Date: Wed, 08 Apr 2020 01:27:55 GMT
< Content-Type: text/plain; charset=utf-8
< Content-Length: 9
< Connection: keep-alive
< Keep-Alive: timeout=5
< ETag: "5e17b3f8-9"
< Cache-Control: no-store
< Pragma: no-cache
< Content-Security-Policy: default-src 'self'
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< Strict-Transport-Security: max-age=31536000; ,;
注意：消 403 Forbidden 息意味着从测试发送的参数不是SSE期望的值，但是这足以验证连接。
验证SSEConnector状态
验证连接器属性（如图所示）。
# more /ngfw/etc/sf/connector.properties
registration_interval=180
connector_port=8989
connector_fqdn=api-sse.cisco.com
要检查SSEConnector和EventHandler之间的连接，请使用此命令。以下是连接错误的示例：
root@firepower:/etc/sf# netstat -anlp | grep EventHandler_SSEConnector.sock
unix 2 [ ACC ] STREAM LISTENING 3022791165 11204/EventHandler /ngfw/var/sf/run/EventHandler_SSEConnector.sock
在已建立的连接示例中，验证流状态是否为connected：
root@firepower:/etc/sf# netstat -anlp | grep EventHandler_SSEConnector.sock
unix 2 [ ACC ] STREAM LISTENING 382276 7741/EventHandler /ngfw/var/sf/run/EventHandler_SSEConnector.sock
unix 3 [ ] STREAM CONNECTED 378537 7741/EventHandler /ngfw/var/sf/run/EventHandler_SSEConnector.soc
验证发送到SSE门户和CTR的数据
要将事件从Cisco安全防火墙设备发送到SSE，需要与https://eventing-ingest.sse.itd.cisco.com建立TCP连接
以下是SSE门户和Cisco安全防火墙之间未建立连接的示例：
root@firepower:/ngfw/var/log/connector# lsof -i | grep conn
connector 60815 www 10u IPv4 3022789647 0t0 TCP localhost:8989 (LISTEN)
connector 60815 www 12u IPv4 110237499 0t0 TCP firepower.cisco.com:53426->ec2-100-25-93-234.compute-1.amazonaws.com:https (SYN_SENT)
在 connector.log 日志中：
time="2020-04-13T14:34:02.88472046-05:00" level=error msg="[firepower.cisco.com][events.go:90 events:connectWebSocket] dial tcp x.x.x.246:443: getsockopt: connection timed out"
time="2020-04-13T14:38:18.244707779-05:00" level=error msg="[firepower.cisco.com][events.go:90 events:connectWebSocket] dial tcp x.x.x.234:443: getsockopt: connection timed out"
time="2020-04-13T14:42:42.564695622-05:00" level=error msg="[firepower.cisco.com][events.go:90 events:connectWebSocket] dial tcp x.x.x.246:443: getsockopt: connection timed out"
time="2020-04-13T14:47:48.484762429-05:00" level=error msg="[firepower.cisco.com][events.go:90 events:connectWebSocket] dial tcp x.x.x.234:443: getsockopt: connection timed out"
time="2020-04-13T14:52:38.404700083-05:00" level=error msg="[firepower.cisco.com][events.go:90 events:connectWebSocket] dial tcp x.x.x.234:443: getsockopt: connection timed out"
注意：请注意，显示的IP地址x.x.x.246和1x.x.x.246属于https://eventing-ingest.sse.itd.cisco.com可能会发生变化。建议允许基于URL而不是IP地址流向SSE门户的流量。
如果未建立此连接，则不会将事件发送到SSE门户。以下是Ciscp安全防火墙和SSE门户之间已建立连接的示例：
root@firepower:# lsof -i | grep conn
connector 13277 www 10u IPv4 26077573 0t0 TCP localhost:8989 (LISTEN)
connector 13277 www 19u IPv4 26077679 0t0 TCP x.x.x.200:56495->ec2-35-172-147-246.compute-1.amazonaws.com:https (ESTABLISHED)
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