RE: 255.255.255.129 netmask?

Erdely, Michael (merdely@usmint.treas.gov)
Thu, 24 Sep 1998 14:06:28 -0400

I'd guess that it's a typo. It probably should be 255.255.255.192.

Thank you,
Michael Erdely
IRM Senior Network Engineer
US Mint Contractor (AINS)

-----Original Message-----
From: C. R. Oldham [mailto:cro@nca.asu.edu]
Sent: Thursday, September 24, 1998 10:37 AM
To: Mailing List, Linux Networking
Subject: 255.255.255.129 netmask?

Greetings,

I'm not a net-newbie--I've been familiar with TCP/IP for some years now,
but this is not something I've had to deal with until now.

I recently got cable Internet access and my provider says my subnet mask
needs to be 255.255.255.129. Being a security-conscious kind of guy, I
set up a Debian 2.0 box to be my "firewall", but I can't

ifconfig eth0 netmask 255.255.255.129

I get

SIOCSIFNETMASK: Invalid argument

This is with

net-tools 1.45
ifconfig 1.33 (1998-03-02)

A netmask of 255.255.255.0 seems to work fine. I know that
255.255.255.129 can be a valid (though unusual) netmask, but what should
I set eth0 for? And if I can't set it for 255.255.255.129, what
problems might I expect?

--
| Charles R. (C. R.) Oldham     | NCA Commission on Schools        |
| cro@nca.asu.edu               | Arizona St. Univ., PO Box 873011,|
| V:602/965-8700 F:602/965-9423 | Tempe, AZ 85287-3011           _ |
| "I like it!"--Citizen G'Kar   | #include <disclaimer.h>       X_>|




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