Nexus Terminal - Telnet TN3270 TN5250 VT320 SSL TLS SSH LPD GDDM FTP SFTP FTPS RS232

Nexus Integration AS is a Norwegian software development company.
The main focus and product is Nexus Terminal. A Telnet 3270, 5250 and VT/ANSI terminal emulator with: recording, a script language, file transfer (ftp and IND$FILE), host print (Telnet 3270 / 5250 host print, LPD and VT pass through print) and HLLAPI.
Nexus Integration is based on more than thirty years of communication software development and consulting. Hands on know-how with SNA (PU type 2.1, APPC / CPIC, HLLAPI, 3270, 5250 and IND$FILE), TCP/IP (telnet, ftp, lpd, nfs/rpc/xdr, http/html/cgi, ssh and ssl) and SMS/MMS protocols (EMI, CIMD and SMPP).
The program languages C, C++ (MS Visual C++), C# and Java has been used in different client/server projects.
Please contact Hans Erik if you need some more information about Nexus Terminal or if you have any other questions.
The source code for the WinSock communication interface used by Nexus Terminal is available online.
Contact information:

Nexus Mainframe Service:

A Windows Service which can be used to test and evaluate Telnet 3270 and 5250 clients.
It can be installed and run from any Windows Server/Workstation.
At startup it will open three listen ports (default 5021, 5022 and 5023).
On each port a set of difference 3270/5250 screen images will be returned.
Listen port numbers can be set in registry at System \ CurrentControlSet \ Services \ NI_MFS.
The first port (5021) is a "slow" replay mode, with a delay of 1.5 second.
The next port (5022) is a "contiguous loop" port. This is done with an insertion of a query at the end of each screen image.
This port connection can be used for performance and stability evaluating.
The last port (5023) is a "normal" replay mode connection.
The event log will be updated when a new connection has been established and when it is disconnected.
Installation:

Copy ni_mfs.exe to disk folder like C:\Program Files\NIMFS and type: ni_mfs.exe -install
Afterwards it can be started from the Control Panel or with the command: net start ni_mfs
And it can be removed with the command: ni_mfs.exe -remove

Downloads:

A ready to run secure Nexus telnet (SSL) session to the US IRS tax system.
TpApi is a HLLAPI test program with source code available for download at: TpApi.zip - 35 KB.
A Visual Basic interface to NMT/HLLAPI, written by Sheantré Noé, is available for download at: vbapi.zip - 4 KB.
A network proxy (NPS), which can be used to check the data (in hexadecimal) between two network sockets (TCP/IP). Unzip nps.zip and move nps.exe to folder like C:\Temp. Nps must be started from a command console (dos).
Usage: nps [Remote host] [Remote port] [Local port] [T] [C]
Like: nps abc.def.com 23 2023 t
In this case, nps will open a listen port 2023 on localhost. When a clients connects to that port, nps will then open a connection to port 23 on abc.def.com (or an IP address) an log all data received and sent to io.log. The T option will append a ascii log to the hexadecimal log and C is used to make a copy both to the log file and to the console.

nps.exe localhost 5023 23 t
```
Wait for local connection on port 23. Terminate nps with Ctrl-C (1)
0023E02E 0778 New connection
Wait for new connection
0023E3FA 0778 Server data 23 311
0023E436 0778 Client data 33 0
0023E47C 0778 Server data 9 70
0023E4B8 0778 Client data 123 50
0023E4B8 0778 Server data 1749 0
```
Column information: Time, socket reference, Client/Server data, byte count and number of ms since the previous data packet was received