[server] auth.log의“sshd : error : connect_to… failed”는 무엇을 의미합니까?

SSH 동적 포트 전달을 설정하여이를 재현 할 수 있습니다.

man ssh:

 -D [bind_address:]port
         Specifies a local “dynamic” application-level port forwarding.  This works by allocating a socket
         to listen to port on the local side, optionally bound to the specified bind_address.  Whenever a
         connection is made to this port, the connection is forwarded over the secure channel, and the
         application protocol is then used to determine where to connect to from the remote machine.  Cur‐
         rently the SOCKS4 and SOCKS5 protocols are supported, and ssh will act as a SOCKS server.  Only
         root can forward privileged ports.  Dynamic port forwardings can also be specified in the configu‐
         ration file.

         IPv6 addresses can be specified by enclosing the address in square brackets.  Only the superuser
         can forward privileged ports.  By default, the local port is bound in accordance with the
         GatewayPorts setting.  However, an explicit bind_address may be used to bind the connection to a
         specific address.  The bind_address of “localhost” indicates that the listening port be bound for
         local use only, while an empty address or ‘*’ indicates that the port should be available from all
         interfaces.

localhost, 포트 2302에서 SOCKS 프록시를 시작하십시오.

$ ssh -v -ND 2302 user@host

Firefox에서이 터널을 통해 HTTP 트래픽을 라우팅하려면 :

편집-> 환경 설정-> 고급-> 네트워크 탭-> 설정-> 수동 프록시 구성-> SOCKS 호스트 : localhost 및 포트 : 2302

다른 트래픽과 함께 SOCKS 프록시를 사용하려면 다음과 같은 양말 화 프로그램을 사용할 수 있습니다 tsocks.

[I] net-proxy/tsocks
     Available versions:  1.8_beta5-r3 ~1.8_beta5-r4 1.8_beta5-r5 ~1.8_beta5-r6 {tordns}
     Installed versions:  1.8_beta5-r5(10:08:28 AM 06/15/2010)(-tordns)
     Homepage:            http://tsocks.sourceforge.net/
     Description:         Transparent SOCKS v4 proxying library

젠투에서 /etc/socks/tsocks.conf아래와 같이 편집하십시오 :

# Otherwise we use the server
server = 127.0.0.1
server_port = 2302

테스트 :

$ tsocks telnet 255.255.255.255 25

/var/log/secureSSH 서버에 다음과 같은 내용이 표시됩니다 .

sshd[28491]: error: connect_to 255.255.255.255 port 25: failed.

내가 이해할 수없는 부분은 누가 그 주소에 정확하게 연결하려고하는지입니다.

범위를 좁히려면 /var/log/secure( auth.log배포판)을 살펴보고이 전에 로그인 한 사람을 확인하십시오.

sshd[26898]: pam_unix(sshd:session): session opened for user quanta

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