TCP/IP Services for OpenVMS Alpha

All types of networks, network stacks, and protocols supported by OpenVMS.
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cct
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TCP/IP Services for OpenVMS Alpha

Post by cct » Thu Aug 20, 2020 7:50 am

I have installed VSI VMS V8.4-2L1 on FreeAXP - Avanti 4.0.0.649 running on Win 10 64, from the Community licensed distribution ISO.

The TCP/IP services installed from this ISO is badged as HP

Code: Select all

$ tcpip show version

  HP TCP/IP Services for OpenVMS Alpha Version V5.7 - ECO 5
  on an AlphaServer 400 4/166 running OpenVMS V8.4-2L1

This is a very old version, and SSH seems to be broken. Putty informs me that "the first key exchange algorithm supported by the server is diffie-hellman-group1-sha1, which below the configured threshold" - but it does allow me to connect.
However if I try to connect from my linux machines, they reject it - no matching key exchange method found

I notice from the documentation that your current version for VMS 8.4-2L1 is version 10.6

Is an upgrade possible, and obtainable?

Many thanks


Regards

Chris


madsweeney
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Re: TCP/IP Services for OpenVMS Alpha

Post by madsweeney » Thu Aug 20, 2020 11:06 am

There is no TCP/IP 10.x release for Alpha. HP TCP/IP V5.7 ECO 5 is the TCP/IP version available for Alpha at this time.

Regards,

Dave Sweeney


marty.stu
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Re: TCP/IP Services for OpenVMS Alpha

Post by marty.stu » Thu Aug 20, 2020 12:06 pm

cct wrote:
Thu Aug 20, 2020 7:50 am
This is a very old version, and SSH seems to be broken. Putty informs me that "the first key exchange algorithm supported by the server is diffie-hellman-group1-sha1, which below the configured threshold" - but it does allow me to connect.
However if I try to connect from my linux machines, they reject it - no matching key exchange method found
Hi Chris,

As a workaround, to log in via SSH from Linux, you can use the following command:

Code: Select all

ssh -o KexAlgorithms=+diffie-hellman-group1-sha1    -o HostKeyAlgorithms=+ssh-dss -c aes256-cbc username@hostname
You can find more info on the issue here, for example: http://wiki.parsec.com/using_openssh_ke ... ll_servers

Kind regards,

Maxim Megalinskiy
VSI Training Team
Last edited by marty.stu on Thu Aug 20, 2020 12:07 pm, edited 1 time in total.
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Topic author
cct
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Re: TCP/IP Services for OpenVMS Alpha

Post by cct » Thu Aug 20, 2020 1:43 pm

My fault - I didn't see any mention of I64/Axp

Maxim, thanks for that - just as well they are internal machines!

Chris


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Re: TCP/IP Services for OpenVMS Alpha

Post by willemgrooters » Tue Oct 06, 2020 2:25 pm

using Putty, I can use SSH but get a message:

The first key-exchange algorithm supported by the server is diffie-hellman-group-1-sha1 which is below the configured warning threshold. Do you want to continue with this connection? (YES/NO)

Yes allows you to login.

So it may depend on your SSH agent.

Ok, this is still HPE's OpenVMS:

$ tcpip sho ver

HP TCP/IP Services for OpenVMS Alpha Version V5.7 - ECO 5
on an AlphaServer DS10 617 MHz running OpenVMS V8.4

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