Thanks. Turned out to be a red herring. Packets are reaching the mid-range server, passing through the firewall but I think there is no application (this is an IBMi mid-range box) on the box to act on them so the host thinks the connection was rejected. I am going to cross-post in the mid-range mailing list.
On Mon, May 3, 2021 at 1:20 PM Matt Hogstrom <m...@hogstrom.org> wrote: > TRACERTE to the mid-range server will hopefully give you an idea of where > the network is stopping you. > > Matt Hogstrom > PGP key 0F143BC1 > > > On May 2, 2021, at 18:10, Laurence Chiu <lch...@gmail.com> wrote: > > > > In the process of setting up some new MQ connections from our Z/OS > > mainframe to new mid-range servers. The development team is trying to > check > > if the connection from Z/OS to the mid range service is working by > issuing > > a telnet command. > > > > Telnet ip address. 1414 > > > > Where they have set 1414 as the port on which they want to run MQ. The > > target server has an application firewall in front of it but that source > > and that port is open. > > > > When they try the telnet command from the TSO command line it just times > > out. And there is no traffic received on the firewall. They tell me they > > are able to telnet to their current development host with no problem. > Would > > there be some specific Z/OS TCP/IP configuration for the target host IP > > address and port that needs to be set up? Nobody seems to know so I'm > > hoping this forum can provide some pointers. > > > > But strangely from the mid-range server they can telnet to Z/OS on the > port > > they have defined for MQ with no problem. In this case they're using > 1440. > > > > Thanks > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
