jsch->无法使用Java从UNIX跳转服务器连接到另一个UNIX服务器 [英] jsch-->Not able to connect from unix jump server to another unix servers using java
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问题描述
我无法将受保护的服务器从一台unix服务器连接到另一台unix服务器.通过ssh，我可以轻松地从腻子连接，但是当从jsch进行connet时，我遇到了错误.
成功的腻子步骤->在腻子中连接server1->成功->使用"ssh user @ ip"连接server2
jsch步骤->
已连接的会话1->一台服务器已连接//注释->在服务器1上运行命令以连接另一台服务器
错误:- 伪终端将不会被分配，因为stdin不是终端. 权限被拒绝，请重试. 权限被拒绝，请重试. 权限被拒绝(公钥，密码，键盘交互). ksh:changeme:未找到 退出状态:127
Jsch示例程序->
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
JSch jsch = new JSch();
jsch.setKnownHosts("C://known_hosts.txt");
session=jsch.getSession(user1, server1, 22);
session.setPassword(password1);
session.setConfig(config);
session.connect();
System.out.println("Connected session1");
String command ="ssh"+" "+"user@ip;"+"password" ;
channel=session.openChannel("exec");
((ChannelExec)channel).setCommand(command);
channel.setInputStream(null);
InputStream in=channel.getInputStream();
((ChannelExec)channel).setErrStream(System.err);
channel.connect();
byte[] tmp=new byte[1024];
while(true){
while(in.available()>0){
int i=in.read(tmp, 0, 1024);
if(i<0)break;
System.out.print("server 1"+new String(tmp, 0, i));
}
if(channel.isClosed()){
System.out.println("exit-status: "+channel.getExitStatus());
break;
}
try{Thread.sleep(1000);}catch(Exception ee){}
channel.disconnect();
session.disconnect();
解决方案
我要添加答案的重要部分:-
JSch jsch = new JSch();
jsch.setKnownHosts("C:/My Program Files/eclipse/workspace/StatusTracker/known_hosts.txt");
// jsch.setKnownHosts(knownHostLoc);
//Jump server connection session started
jumpServerSession = jsch.getSession(userid, jump server ip/hostname, 22);
jumpServerSession.setPassword(jump server password);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
jumpServerSession.setConfig(config);
jumpServerSession.connect();
System.out.println("The session has been established to "+jump server userid+"@"+jump server name);
int assinged_port = jumpServerSession.setPortForwardingL(0, other server ip, 22);
System.out.println("portforwarding: "+
"localhost:"+assinged_port+" -> "+other server ip+":"+22);
//Main server connection session started
targetServerSession = jsch.getSession(fileBO.getServerUserId(), "127.0.0.1", assinged_port);
targetServerSession.setHostKeyAlias(other server ip);
targetServerSession.setPassword(other server password);
java.util.Properties config1 = new java.util.Properties();
config1.put("StrictHostKeyChecking", "no");
targetServerSession.setConfig(config1);
targetServerSession.connect();
channel = targetServerSession.openChannel("sftp");
channel = targetServerSession.openChannel("exec");
//command want to execute on dest server
((ChannelExec)channel).setCommand("pwd");
channel.setInputStream(null);
InputStream in11=channel.getInputStream();
((ChannelExec)channel).setErrStream(System.err);
channel.connect();
byte[] tmp1=new byte[1024];
while(true){
while(in11.available()>0){
int i1=in11.read(tmp1, 0, 1024);
if(i1<0)break;
System.out.print(new String(tmp1, 0, i1));
}
if(channel.isClosed()){
System.out.println("exit-status: "+channel.getExitStatus());
break;
}
try{Thread.sleep(1000);}catch(Exception ee){}
}
} catch (final JSchException e) {
LOGGER.error(e.getMessage());
}
I am not able to connect secured server one unix server to another unix server.From putty by ssh i am able to connect easily but i am geeting below error when connet from jsch.
successful putty Steps->connect server1 in putty->on successful->Connect server2 using "ssh user@ip"
jsch steps-->
Connected session1-->one server connected //comment-->running command on server 1 to connect other server
Error:- Pseudo-terminal will not be allocated because stdin is not a terminal. Permission denied, please try again. Permission denied, please try again. Permission denied (publickey,password,keyboard-interactive). ksh: changeme: not found exit-status: 127
Jsch sample program-->
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
JSch jsch = new JSch();
jsch.setKnownHosts("C://known_hosts.txt");
session=jsch.getSession(user1, server1, 22);
session.setPassword(password1);
session.setConfig(config);
session.connect();
System.out.println("Connected session1");
String command ="ssh"+" "+"user@ip;"+"password" ;
channel=session.openChannel("exec");
((ChannelExec)channel).setCommand(command);
channel.setInputStream(null);
InputStream in=channel.getInputStream();
((ChannelExec)channel).setErrStream(System.err);
channel.connect();
byte[] tmp=new byte[1024];
while(true){
while(in.available()>0){
int i=in.read(tmp, 0, 1024);
if(i<0)break;
System.out.print("server 1"+new String(tmp, 0, i));
}
if(channel.isClosed()){
System.out.println("exit-status: "+channel.getExitStatus());
break;
}
try{Thread.sleep(1000);}catch(Exception ee){}
channel.disconnect();
session.disconnect();
解决方案
I am adding important part of answer:-
JSch jsch = new JSch();
jsch.setKnownHosts("C:/My Program Files/eclipse/workspace/StatusTracker/known_hosts.txt");
// jsch.setKnownHosts(knownHostLoc);
//Jump server connection session started
jumpServerSession = jsch.getSession(userid, jump server ip/hostname, 22);
jumpServerSession.setPassword(jump server password);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
jumpServerSession.setConfig(config);
jumpServerSession.connect();
System.out.println("The session has been established to "+jump server userid+"@"+jump server name);
int assinged_port = jumpServerSession.setPortForwardingL(0, other server ip, 22);
System.out.println("portforwarding: "+
"localhost:"+assinged_port+" -> "+other server ip+":"+22);
//Main server connection session started
targetServerSession = jsch.getSession(fileBO.getServerUserId(), "127.0.0.1", assinged_port);
targetServerSession.setHostKeyAlias(other server ip);
targetServerSession.setPassword(other server password);
java.util.Properties config1 = new java.util.Properties();
config1.put("StrictHostKeyChecking", "no");
targetServerSession.setConfig(config1);
targetServerSession.connect();
channel = targetServerSession.openChannel("sftp");
channel = targetServerSession.openChannel("exec");
//command want to execute on dest server
((ChannelExec)channel).setCommand("pwd");
channel.setInputStream(null);
InputStream in11=channel.getInputStream();
((ChannelExec)channel).setErrStream(System.err);
channel.connect();
byte[] tmp1=new byte[1024];
while(true){
while(in11.available()>0){
int i1=in11.read(tmp1, 0, 1024);
if(i1<0)break;
System.out.print(new String(tmp1, 0, i1));
}
if(channel.isClosed()){
System.out.println("exit-status: "+channel.getExitStatus());
break;
}
try{Thread.sleep(1000);}catch(Exception ee){}
}
} catch (final JSchException e) {
LOGGER.error(e.getMessage());
}
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