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No access to HOST from emulated VMS

 
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No access to HOST from emulated VMS

Hi there Pals,

I'm running the Personal Alpha emulator + VMS 8.3 on a PC.
I can solve DNS via the routing param I gave with TCPIP$CONFIG.
My ADSL router address is 192.168.1.1
Emulator is 192.168.1.13 (fixed), local PC is 192.168.1.20 (fixed)
I can do FTP from the PC to VMS, I can ping from VMS to the router, I can ping everyone else on the Internet but I cannot ping the host PC (real issue when you want to do a $ set display/create...)

This used to work fine a few months ago.

What did miss pls ?

I checked my firewall and found noting relevant.

Thanks
9 REPLIES
Volker Halle
Honored Contributor
Solution

Re: No access to HOST from emulated VMS

Didier,

you say you can do FTP from PC to VMS. Then there must be a valid TCPIP communication path forwards and backwards.

What happens if you do TELNET PC-IP-adress from VMS ?

Volker.

cross-posted in c.o.v
Volker Halle
Honored Contributor

Re: No access to HOST from emulated VMS

Didier,

look at the MAC addresses being presented to OpenVMS (SDA> SHOW LAN/DEV=ESA/FULL) and the MAC address seen on Windows (ipconfig /all). If you can FTP from PC to VMS, check ARP -A afterwards from PC and OpenVMS (needs @SYS$MANAGER:TCPIP$DEFINE_COMMANDS first).

In my case, Windows reports the 'real' IP address of the LAN interface, which is being run in shared mode by PersonalAlpha, as: 00-10-18-18-12-c8

OpenVMS sees this LAN interface as: 00-11-19-19-3-c9

This must be the Alpha NDIS5 driver playing games with the MAC adress...

Volker.
Volker Halle
Honored Contributor

Re: No access to HOST from emulated VMS

Didier,

there once was a description on the emulatorsinternational.com site on how to use the Microsoft Loopback Adapter, but that page is gone. I never had to use that, but you may be able to figure out, how to set that up and then use one of those 'loopback LAN' devices from your PersonalAlpha and the other one from Windows.

Volker.
Volker Halle
Honored Contributor

Re: No access to HOST from emulated VMS

Didier,

the page about PersonalAlpha dn loopback driver is still in the Google cache !

Search in Google for 'personalalpha microsoft loopback'

and look up the 2nd entry found via the 'in cache' link ...

Volker.

Re: No access to HOST from emulated VMS

System> sh net

Product: DECNET Node: DTL Address(es): 1.1
Product: TCP/IP Node: dtl.home Address(es): 192.168.1.13
System>

System> arp -a
router (192.168.1.1) at 00-15-56-0a-3e-d1
192.168.1.14 at 02-00-4c-4f-4f-50
System>

C:\Documents and Settings\Didier Morandi>arp -a

Interface : 192.168.1.14 --- 0x20004
Adresse Internet Adresse physique Type
192.168.1.1 00-15-56-0a-3e-d1 dynamique
192.168.1.13 aa-00-04-00-01-04 dynamique

C:\Documents and Settings\Didier Morandi>

I chose the Bridge address (1.14) in the Emulator, I kept 1.13 for VMS and ipconf/all on the PC sez:

C:\Documents and Settings\Didier Morandi>ipconfig/all

Configuration IP de Windows

Nom de l'hôte . . . . . . . . . . : MAISON
Suffixe DNS principal . . . . . . :
Type de noeud . . . . . . . . . . : Diffusion
Routage IP activé . . . . . . . . : Non
Proxy WINS activé . . . . . . . . : Non

Carte Ethernet Pont réseau:

Suffixe DNS propre à la connexion :
Description . . . . . . . . . . . : Miniport de pont MAC
Adresse physique . . . . . . . . .: 02-00-4C-4F-4F-50
DHCP activé. . . . . . . . . . . : Non
Adresse IP. . . . . . . . . . . . : 192.168.1.14
Masque de sous-réseau . . . . . . : 255.255.255.0
Passerelle par défaut . . . . . . : 192.168.1.1
Serveurs DNS . . . . . . . . . . : 192.168.1.1

C:\Documents and Settings\Didier Morandi>

better ?
No. Still no access to the PC.
cdan
Frequent Advisor

Re: No access to HOST from emulated VMS

Didier,
I connect to PC from P.Alpha using bridge address (in your case 192.168.1.14)
Jon Pinkley
Honored Contributor

Re: No access to HOST from emulated VMS

Didier,

Make sure your PC firewall isn't blocking ICMP (ping). Perhaps that is the problem.

Jon
it depends

Re: No access to HOST from emulated VMS

I installed PA on my Laptop and Bob was my Uncle at once.

So, I then tried to ping the Tabletop from the laptop : no answer.

So the problem is within the Tabletop security policy.

I'll keep you informed.
Thanks for your time.

Re: No access to HOST from emulated VMS

AND THE WINNER IS

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J O H N P I N K L E Y

Well, it took sometime to find where to activate "ICMP". Actually, it is in the advanced section of the Firewall mgr.

Thanks John. Ten points. :-)