You can use Stunnel in conjunction with Telnet. You just need a Telnet client that supports it. See
Case Study: Secure Telnet Using C-Kermit 7.1 with Stunnel http://www.kermit-project.org/case21.html > Alas, I am limited to implementing a SSL proxy solution for > backward compatibility with existing software which is based on > a telnet-like protocol. If I simply wanted a secure remote login > service I would use SSH (which I do). > > Can a transparent SSL proxy solution along the lines of stunnel > work in principle for plain telnet and similar protocols? > > Or is there a sound technical reason why telnet+stunnel cannot > work (at least to the extent of avoiding the client-server > deadlock problem I observe)? > > > > > > > > Jeffrey Altman <[EMAIL PROTECTED]> > Sent by: [EMAIL PROTECTED] > 08/03/2002 23:19 > Please respond to openssl-users > > > To: [EMAIL PROTECTED] > cc: OpenSSL User Support Mailing List <[EMAIL PROTECTED]> > Subject: Re: Help! SSL Telnet client-server deadlock problem. > > > I would suggest that you use a supported implementation of Telnet that > supports START_TLS. Read > > http://www.kermit-project.org/telnetd.html > > > > > Please help. I have a major problem with SSL Telnet. > > > > When I connect with SSL-MZtelnet-0.11.2 client from my > > FreeBSD 4.4 box through a SSL proxy to a telnet server on AIX > > 4.3.2 and run "ls -l" command screen output sometimes does not > > complete. If I hit enter then last few lines are displayed. > > > > There is obviously some kind of deadlock situation occurring. > > > > Tried several different SSL proxy software packages, all based > > on OpenSSL: Stunnel, SSLWrap, SSLProxy, DeleGate. Same deadlock > > problem occurs with every one of these to some extent. > > > > Tried upgrading OpenSSL version on AIX - no effect. > > > > Tried running Stunnel proxy on FreeBSD instead of AIX - no effect. > > > > Tried modifying the DeleGate SSL code based on what I read about > > SSL client-sever deadlocks in Eric Rescorla's excellent (but > > too short) book on SSL - no effect but that could be my coding. > > > > I also have a similar deadlock problem when I run a propietary > > application under Windows which uses Telnet over SSL to connect > > to the AIX server. > > > > Any suggestions welcome. I have run out of ideas at this point. > > Are there any other SSL proxies I could try, commercial and free? > > ______________________________________________________________________ > > OpenSSL Project http://www.openssl.org > > User Support Mailing List [EMAIL PROTECTED] > > Automated List Manager [EMAIL PROTECTED] > > > > > > Jeffrey Altman * Sr.Software Designer C-Kermit 8.0 available now!!! > The Kermit Project @ Columbia University includes Telnet, FTP and HTTP > http://www.kermit-project.org/ secured with Kerberos, SRP, and > [EMAIL PROTECTED] OpenSSL. Interfaces with > OpenSSH > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List [EMAIL PROTECTED] > Automated List Manager [EMAIL PROTECTED] > > > > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List [EMAIL PROTECTED] > Automated List Manager [EMAIL PROTECTED] > Jeffrey Altman * Sr.Software Designer C-Kermit 8.0 available now!!! The Kermit Project @ Columbia University includes Telnet, FTP and HTTP http://www.kermit-project.org/ secured with Kerberos, SRP, and [EMAIL PROTECTED] OpenSSL. Interfaces with OpenSSH ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
