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se1k1h1mawar1
Posts: 121
Posted 14:27 Feb 07, 2015 |

Is anybody else having trouble connecting to mars?

What are some things that we can try to successfully connect to it when things like this happen other than rebooting our computer(s) and trying it with different computers or a network?

 

ssh_exchange_identification: Connection closed by remote host


Above is the  message I am getting back in response to ssh user_name@mars.calstatela.edu.

Last edited by se1k1h1mawar1 at 14:51 Feb 07, 2015.
alexnassif
Posts: 12
Posted 14:42 Feb 07, 2015 |
I am too
Izuniga3
Posts: 4
Posted 14:44 Feb 07, 2015 |
Yeah i havent been able to log on since 8 this morning
raywu64
Posts: 44
Posted 14:48 Feb 07, 2015 |

Maybe call ITS? 

jwarren6
Posts: 56
Posted 15:06 Feb 07, 2015 |

You can log into mars using FTP (port 21), but not SFTP. Port 22 seems to be down for some reason.

Weird.

khuynh10
Posts: 9
Posted 15:13 Feb 07, 2015 |

Same here. Does this mean extension of the due date?  

Last edited by khuynh10 at 15:14 Feb 07, 2015.
jwarren6
Posts: 56
Posted 15:41 Feb 07, 2015 |

Dr. Pamula did say that he would like to have our labs in by the deadline but that if we didn't, it would be fine. Don't really know what that meant for sure. It seems like it would be alright to turn in stuff late with no penalty. Your call.

On the other hand, I did mention that you can login to the mars server using ftp. Mars is working.

Izuniga3
Posts: 4
Posted 16:19 Feb 07, 2015 |
Okay but how would you use ftp to run the our programs is it the same shell?
jwarren6
Posts: 56
Posted 16:26 Feb 07, 2015 |

Create a new connection using whatever shell program you are using. Same user, same domain, FTP protocol, port 21.

ahnman341
Posts: 22
Posted 19:04 Feb 07, 2015 |

I can't connect via SSH.  

I can upload via FTP but I want to test .cpp files.  

Adam Berman
Posts: 19
Posted 19:08 Feb 07, 2015 |

nmap reports port 22 as open, for what it's worth. But I concur, SFTP is down but FTP isn't.

 

SSH also appears to be down (up on nmap, of course), but telnet on port 23 is up.

 

Weird.

 

(it'd be a pretty cute man-in-the-middle attack if mars wasn't so useless; block sftp and ssh and sniff ftp and telnet passwords from unsuspecting students!)

Last edited by Adam Berman at 19:25 Feb 07, 2015.
jwarren6
Posts: 56
Posted 19:13 Feb 07, 2015 |
ahnman341 wrote:

I can't connect via SSH.  

I can upload via FTP but I want to test .cpp files.  

I'm sorry but I don't know which SSH program you are using, I can't guide you. Look for a way to create a new session and create it using the same host (mars.calstatela.edu), same user (your CalStateLA user id), same password, AND port 21. Technically it's not an ssh connection as there is no encryption involved since mars' port 22 is shut. Port 22 is for secure connections.

I hope this helps you a bit.

Adam Berman
Posts: 19
Posted 19:27 Feb 07, 2015 |
jwarren6 wrote:
ahnman341 wrote:

I can't connect via SSH.  

I can upload via FTP but I want to test .cpp files.  

I'm sorry but I don't know which SSH program you are using, I can't guide you. Look for a way to create a new session and create it using the same host (mars.calstatela.edu), same user (your CalStateLA user id), same password, AND port 21. Technically it's not an ssh connection as there is no encryption involved since mars' port 22 is shut. Port 22 is for secure connections.

I hope this helps you a bit.

These settings worked for me using putty:

http://imgur.com/FsUlrqk

Note that you're connecting via cleartext; don't upload your SSN during this session or something.

Last edited by Adam Berman at 19:29 Feb 07, 2015.
se1k1h1mawar1
Posts: 121
Posted 19:55 Feb 07, 2015 |
Adam Berman wrote:

nmap reports port 22 as open, for what it's worth. But I concur, SFTP is down but FTP isn't.

 

SSH also appears to be down (up on nmap, of course), but telnet on port 23 is up.

 

Weird.

 

(it'd be a pretty cute man-in-the-middle attack if mars wasn't so useless; block sftp and ssh and sniff ftp and telnet passwords from unsuspecting students!)

Thank you so very much for this info.
Truly appreciated!

ahnman341
Posts: 22
Posted 20:05 Feb 07, 2015 |

confirmed login to mars.  

settings:  hostname: mars.calstatela.edu, port:  23, connection type: Telnet


thanks adam