簡介
本文檔介紹如何解決安全管理裝置(SMA)和郵件安全裝置(ESA)整合失敗導致的錯誤：「（3， '找不到匹配的金鑰交換演算法。'）或「未預期的EOF連線」和其他症狀。
背景資訊
與ESA的SMA連線首次整合時，SMA為ESA提供以下密碼/金鑰交換演算法：
kex_algorithms string: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
encryption_algorithms_client_to_server string: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
encryption_algorithms_server_to_client string: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
建立SMA和ESA連線後，SMA為ESA提供以下密碼/金鑰交換演算法：
kex_algorithms string: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
encryption_algorithms_client_to_server string [truncated]: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
encryption_algorithms_server_to_client string [truncated]: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
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。
問題
從GUI > Management Appliance > Centralized Services > Security Appliances或CLI > applianceconfig將SMA整合到ESA時存在問題。此問題會在連線時提示錯誤，這是由於ESA缺少某些金鑰演算法/密碼演算法。
1. (3, 'Could not find matching key exchange algorithm.')
2. Error — Unexpected EOF on connect.
解決方案
要解決此問題，需要將ESA ssh密碼配置恢復為提供的預設值：
lab.esa.com> sshconfig
Choose the operation you want to perform:
- SSHD - Edit SSH server settings.
- USERKEY - Edit SSH User Key settings
- ACCESS CONTROL - Edit SSH whitelist/blacklist
[]> sshd
ssh server config settings:
Public Key Authentication Algorithms:
rsa1
ssh-dss
ssh-rsa
Cipher Algorithms:
aes128-ctr
aes192-ctr
aes256-ctr
aes128-cbc
3des-cbc
blowfish-cbc
cast128-cbc
aes192-cbc
aes256-cbc
rijndael-cbc@lysator.liu.se
MAC Methods:
hmac-md5
hmac-sha1
umac-64@openssh.com
hmac-ripemd160
hmac-ripemd160@openssh.com
hmac-sha1-96
hmac-md5-96
Minimum Server Key Size:
1024
KEX Algorithms:
diffie-hellman-group-exchange-sha256
diffie-hellman-group-exchange-sha1
diffie-hellman-group14-sha1
diffie-hellman-group1-sha1
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
逐步設定時CLI > sshconfig > sshd的輸出：
[]> setup
Enter the Public Key Authentication Algorithms do you want to use
[rsa1,ssh-dss,ssh-rsa]>
Enter the Cipher Algorithms do you want to use
[aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se]>
Enter the MAC Methods do you want to use
[hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96]>
Enter the Minimum Server Key Size do you want to use
[1024]>
Enter the KEX Algorithms do you want to use
[diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521]>
相關資訊
意見