SDWAN Cisco IOS XE TLS系統日誌伺服器配置

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已更新: 2024 年 12 月 19 日

文件 ID:222665

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簡介

本文檔介紹在SD-WAN Cisco IOS® XE裝置上配置TLS系統日誌伺服器的全面指南。

必要條件

在SD-WAN Cisco IOS XE裝置上繼續配置TLS系統日誌伺服器之前，請確保滿足以下要求：

需求

思科建議您瞭解以下主題：

SD-WAN控制器 — 確保您的網路包括正確配置的SD-WAN控制器。
Cisco IOS XE SD-WAN路由器 — 運行Cisco IOS XE SD-WAN映像的相容路由器。
系統日誌服務器 — 基於Ubuntu的系統日誌伺服器，例如syslog-ng，用於收集和管理日誌資料。

採用元件

本文中的資訊係根據以下軟體和硬體版本：

vManage:版本20.9.4
Cisco IOS XE SD-WAN:版本17.9.4
Ubuntu:版本22.04
syslog-ng:版本3.27

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。

組態

1.在Ubuntu電腦上安裝系統日誌

要在Ubuntu伺服器上設定syslog-ng，請執行以下步驟以確保正確安裝和配置。

步驟1.配置網路設定

安裝Ubuntu伺服器後，請配置靜態IP地址和DNS伺服器，以確保電腦可以訪問Internet。這對於下載軟體包和更新至關重要。

步驟2.安裝系統日誌 — ng

在Ubuntu電腦上開啟終端並運行：

sudo apt-get install syslog-ng
sudo apt-get install syslog-ng openssl

2.在Syslog伺服器上安裝用於伺服器身份驗證的根證書頒發機構

建立目錄並生成金鑰

cd /etc/syslog-ng
mkdir cert.d key.d ca.d
cd cert.d
openssl genrsa -out ca.key 2048
openssl req -new -x509 -key ca.key -out PROXY-SIGNING-CA.ca -days 730

# Copy key to the key.d folder
cp ca.key ../key.d

計算指紋

執行命令並複製輸出：

openssl x509 -in PROXY-SIGNING-CA.ca -fingerprint -noout | awk -F "=" '{print $2}' | sed 's/://g' | tee fingerprint.txt
#輸出示例：54F371C8EE2BFB06E2C2D0944245C288FBB07163

3.配置syslog-ng伺服器配置檔案

編輯syslog-ng配置檔案：

sudo nano /etc/syslog-ng/syslog-ng.conf

新增配置：

source s_src {
    network(
        ip(0.0.0.0) port(6514)
        transport("tls")
        tls(
            key-file("/etc/syslog-ng/key.d/ca.key")
            cert-file("/etc/syslog-ng/cert.d/PROXY-SIGNING-CA.ca")
            peer-verify(optional-untrusted)
        )
    );
};

destination remote {
    file("/var/log/syslog");
};

log { source(s_src); destination(remote); };

4.在Cisco IOS XE SD-WAN裝置上安裝根證書頒發機構以進行伺服器身份驗證

從CLI配置

進入組態設定模式：

config-t

配置信任點：

crypto pki trustpoint PROXY-SIGNING-CA
  enrollment url bootflash:
  revocation-check none
  rsakeypair PROXY-SIGNING-CA 2048
  subject-name cn=proxy-signing-cert
  fqdn none
  fingerprint 54F371C8EE2BFB06E2C2D0944245C288FBB07163 >> The fingerprint configured was obtained from the fingerprint.txt file above
commit

使用相同的名稱，將PROXY-SIGNING-CA.ca檔案從您的系統日誌伺服器複製到路由器bootflash。
驗證信任點：

crypto pki authenticate PROXY-SIGNING-CA

example:
Router#crypto pki authenticate PROXY-SIGNING-CA
Reading file from bootflash:PROXY-SIGNING-CA.ca
Certificate has the  attributes:
Fingerprint MD5: 7A97B30B 2AE458FF D9E7D91F 66488DCF
Fingerprint SHA1: 21E0F09B B67B2E9D 706DBE69 856E5AA3 D39A268A
Trustpoint Fingerprint: 21E0F09B B67B2E9D 706DBE69 856E5AA3 D39A268A
Certificate validated - fingerprints matched.
Trustpoint CA certificate accepted.

註冊信任點：

crypto pki enroll PROXY-SIGNING-CA

example:
vm32#crypto pki enroll PROXY-SIGNING-CA
Start certificate enrollment ..
The subject name in the certificate will include: cn=proxy-signing-cert
The fully-qualified domain name will not be included in the certificate
Certificate request sent to file system
The 'show crypto pki certificate verbose PROXY-SIGNING-CA' commandwill show the fingerprint.

將PROXY-SIGNING-CA.req 檔案從路由器複製到系統日誌伺服器。

在Syslog伺服器上簽署證書

openssl x509 -in PROXY-SIGNING-CA.req -req -CA PROXY-SIGNING-CA.ca -CAkey ca.key -out PROXY-SIGNING-CA.crt -CAcreateserial -extensions ca_extensions

將產生的檔案(PROXY-SIGNING-CA.crt)複製到路由器開機快閃記憶體。複製scp:bootflash:
匯入證書：

crypto pki import PROXY-SIGNING-CA certificate
example:
Router# crypto pki import PROXY-SIGNING-CA certificate
% The fully-qualified domain name will not be included in the certificate
% Request to retrieve Certificate queued

驗證設定

show crypto pki trustpoint PROXY-SIGNING-CA status

example:
Router#show crypto pki trustpoint PROXY-SIGNING-CA status
Trustpoint PROXY-SIGNING-CA:
Issuing CA certificate configured:
Subject Name:
o=Internet Widgits Pty Ltd,st=Some-State,c=AU
Fingerprint MD5: 7A97B30B 2AE458FF D9E7D91F 66488DCF
Fingerprint SHA1: 21E0F09B B67B2E9D 706DBE69 856E5AA3 D39A268A
Router General Purpose certificate configured:
Subject Name:
cn=proxy-signing-cert
Fingerprint MD5: 140A1EAB FE945D56 D1A53855 FF361F3F
Fingerprint SHA1: ECA67413 9C102869 69F582A4 73E2B98C 80EFD6D5
Last enrollment status: Granted
State:
Keys generated ............. Yes (General Purpose, non-exportable)
Issuing CA authenticated ....... Yes
Certificate request(s) ..... Yes

5.在Cisco IOS XE SD-WAN路由器上配置TLS系統日誌伺服器

使用以下命令配置syslog伺服器：

logging trap syslog-format rfc5424
logging source-interface GigabitEthernet0/0/0
logging tls-profile tls-profile
logging host X.X.X.X transport tls profile tls-profile
tls-version TLSv1.2

6.核查

檢查路由器上的日誌

show logging

Showing last 10 lines
Log Buffer (512000 bytes):
Apr 9 05:59:48.025: %DMI-5-CONFIG_I: R0/0: dmiauthd: Configured from NETCONF/RESTCONF by admin, transaction-id 189410
Apr 9 05:59:48.709: %DMI-5-AUTH_PASSED: R0/0: dmiauthd: User 'vmanage-admin' authenticated successfully from 1.1.1.1:58393 for netconf over ssh. External groups:
Apr 9 05:59:50.015: %LINK-5-CHANGED: Interface GigabitEthernet0/0/1, changed state to administratively down
Apr 9 05:59:51.016: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to down
Apr 9 05:59:52.242: %SYS-5-CONFIG_P: Configured programmatically by process iosp_dmiauthd_conn_100001_vty_100001 from console as admin on vty4294966494

檢查系統日誌伺服器上的日誌

tail -f /var/log/syslog

root@server1:/etc/syslog-ng# tail -f /var/log/syslog
Apr 9 15:51:14 10.66.91.94 188 <189>1 2024-04-09T05:51:51.037Z - - - - - BOM%DMI-5-AUTH_PASSED: R0/0: dmiauthd: User 'vmanage-admin' authenticated successfully from 1.1.1.1:38032 for netconf over ssh. External groups:
Apr 9 15:59:10 10.66.91.94 177 <189>1 2024-04-09T05:59:47.463Z - - - - - BOM%SYS-5-CONFIG_P: Configured programmatically by process iosp_dmiauthd_conn_100001_vty_100001 from console as admin on vty4294966494
Apr 9 15:59:10 10.66.91.94 177 <189>1 2024-04-09T05:59:47.463Z - - - - - BOM%SYS-5-CONFIG_P: Configured programmatically by process iosp_dmiauthd_conn_100001_vty_100001 from console as admin on vty4294966494
Apr 9 15:59:10 10.66.91.94 143 <189>1 2024-04-09T05:59:47.463Z - - - - - BOM%DMI-5-CONFIG_I: R0/0: dmiauthd: Configured from NETCONF/RESTCONF by admin, transaction-id 189410
Apr 9 15:59:11 10.66.91.94 188 <189>1 2024-04-09T05:59:48.711Z - - - - - BOM%DMI-5-AUTH_PASSED: R0/0: dmiauthd: User 'vmanage-admin' authenticated successfully from 1.1.1.1:58393 for netconf over ssh. External groups:
Apr 9 15:59:13 10.66.91.94 133 <189>1 2024-04-09T05:59:50.016Z - - - - - BOM%LINK-5-CHANGED: Interface GigabitEthernet0/0/1, changed state to administratively down
Apr 9 15:59:13 10.66.91.94 137 <189>1 2024-04-09T05:59:50.016Z - - - - - BOM%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to down
Apr 9 15:59:15 10.66.91.94 177 <189>1 2024-04-09T05:59:52.242Z - - - - - BOM%SYS-5-CONFIG_P: Configured programmatically by process iosp_dmiauthd_conn_100001_vty_100001 from console as admin on vty4294966494
Apr 9 15:59:15 10.66.91.94 177 <189>1 2024-04-09T05:59:52.242Z - - - - - BOM%SYS-5-CONFIG_P: Configured programmatically by process iosp_dmiauthd_conn_100001_vty_100001 from console as admin on vty4294966494
Apr 9 15:59:18 10.66.91.94 188 <189>1 2024-04-09T05:59:55.286Z - - - - - BOM%DMI-5-AUTH_PASSED: R0/0: dmiauthd: User 'vmanage-admin' authenticated successfully from 1.1.1.1:34575 for netconf over ssh. External groups:
Apr 9 15:59:21 10.66.91.94 113 <187>1 2024-04-09T05:59:58.882Z - - - - - BOM%LINK-3-UPDOWN: Interface GigabitEthernet0/0/1, changed state to up
Apr 9 15:59:21 10.66.91.94 135 <189>1 2024-04-09T05:59:59.882Z - - - - - BOM%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to up
Apr 9 15:59:28 10.66.91.94 177 <189>1 2024-04-09T06:00:05.536Z - - - - - BOM%SYS-5-CONFIG_P: Configured programmatically by process iosp_dmiauthd_conn_100001_vty_100001 from console as admin on vty4294966494
Apr 9 15:59:43 10.66.91.94 188 <189>1 2024-04-09T06:00:20.537Z - - - - - BOM%DMI-5-AUTH_PASSED: R0/0: dmiauthd: User 'vmanage-admin' authenticated successfully from 1.1.1.1:43530 for netconf over ssh. External groups:

資料包捕獲螢幕截圖，您可以看到正在發生的加密通訊：

Packet Capture Screenshot

ISR4331-branch-NEW_Branch#show logging

Trap logging: level informational, 6284 message lines logged
    Logging to 10.66.91.170  (tls port 6514, audit disabled,
          link up),
          131 message lines logged, 
          0 message lines rate-limited, 
          0 message lines dropped-by-MD, 
          xml disabled, sequence number disabled
          filtering disabled
          tls-profile: tls-proile
    Logging Source-Interface:       VRF Name:
    GigabitEthernet0/0/0            
TLS Profiles: 
    Profile Name: tls-proile
          Ciphersuites: Default
          Trustpoint: Default
          TLS version: TLSv1.2