SUMMARY: one way network traffic

From: Don Khan (
Date: Tue Aug 05 1997 - 00:43:45 CDT

Thanks for everyone who replied. First the original question...

A sun sparc running solaris 2.5.1 on subnet A, an alpha running VMS on
subnet A. When someone tries to telnet (or any network connection) the
sparc from the same subnet, no problem. I can telnet to the sparc from the
alpha. Problem is when I try to telnet to the sparc from another subnet I
can't make a connetion. I am not sure if this is a problem with the router
but from another subnet I can do two-way network traffic from any machine
on subnet A. I did some checking and when connecting to the sparc from
another subnet, the sparc is recieving the connection, it appears that
packets are not leaving the subnet A. SO the end result is that the sparc
is not accessible from machines outside of subnet A. I have a netstat -rn:

Routing Table:
  Destination Gateway Flags Ref Use Interface
-------------------- -------------------- ----- ----- ------ --------- UH 0 35673 lo0 U 3 77 le0 U 3 0 le0
default UG 0 558

Any suggestions welcome.

I forgot to mention that at our site we really have multiple class C
networks that are supernetted. I have this habit of calling each network a
subnet. Wrong name I know, just a habit.

The problem would occur sporadically. Most of the time it would occur
during heavy usage of the network. It turned out that the problem was the
router. Once the router was reset everything worked. I haven't had any
problems since last week. Thanks again to the following...

Ada Chan <>
Somkit Khemmanivanh <>
Viet Hoang <>
Seth Rothenberg <>
Brion Leary <>

They all suggested that the problem might be the network settings on the
sparc. I thought so too although I repeatedly rechecked those settings.

Don Khan
Wentworth Institute of Technology, Boston MA, USA

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