Linux-Networking Digest #732, Volume #11 Wed, 30 Jun 99 15:14:01 EDT
Contents:
Re: Why not C++ (Greg Comeau)
Re: Help!! Linux 2.2.5 does not allow broadcast pings anymore, why? ("Eriksson")
Re: can't ftp/telnet as root (Eran Dvey-Aharon)
Re: "invalid password" (Win95) using samba (Nicholas E Couchman)
Re: Why not C++ (Greg Comeau)
Re: DNS cache and database ([EMAIL PROTECTED])
Re: Newbie Question (Duncan Simpson)
Re: Why not C++ (Greg Comeau)
Re: HELP! Netscape doesn't recognize dialed-up connections ("R Sweeney")
Re: Why not C++ (Greg Comeau)
Re: third level domains (Eric Sandvik)
Linux to Win98 running WinProxy ("Fomer")
Re: Remote login problems in custom RedHat env... (Jon Skeet)
Re: DHCP flooded cable network!! (Mark Evans)
Re: Proxim Symphony ([EMAIL PROTECTED])
Re: Why not C++ (Greg Comeau)
laptop pcmcia interrupts (Ken R.)
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] (Greg Comeau)
Crossposted-To: comp.os.linux.development.apps,comp.os.linux.development.system
Subject: Re: Why not C++
Date: 30 Jun 1999 13:31:52 -0400
Reply-To: [EMAIL PROTECTED]
In article <[EMAIL PROTECTED]> Johan Kullstam <[EMAIL PROTECTED]>
writes:
>[EMAIL PROTECTED] (Nathan Myers) writes:
>
>> Johan Kullstam <[EMAIL PROTECTED]> wrote:
>> >the memory fragmentation problem pretty much precludes seriously using
>> >C++ for kernel work. look to microsoft for examples of C++ in action.
>
>> Nazis eat peanut butter. Therefore peanut butter is bad.
>
>thanks for trying godwin's law.
>
>> This supposed "memory fragmentation problem" is just more FUD.
>> Shame on you, Johan.
>
>no, this one really *is* *true*. if you malloc and free a lot of
>things of different sizes, then heap memory does get chopped up. there
>are little bits of free memory here and there. you cannot consolidate
>them. and when allocating you search around for these free holes.
>the typical C++ program does a lot of malloc and free. memory
>fragmentation does occur and it does cause performance loss.
Ok, let's try this again:
The LINUX kernel does memory allocation.
Therefore the LINUX kernel would be a typical C++ program.
Round 3? :)
- Greg
--
Comeau Computing, 91-34 120th Street, Richmond Hill, NY, 11418-3214
Producers of Comeau C/C++ 4.2.38 -- New Release! We now do Windows too.
Email: [EMAIL PROTECTED] / Voice:718-945-0009 / Fax:718-441-2310
*** WEB: http://www.comeaucomputing.com ***
------------------------------
From: "Eriksson" <[EMAIL PROTECTED]>
Subject: Re: Help!! Linux 2.2.5 does not allow broadcast pings anymore, why?
Date: Wed, 30 Jun 1999 17:30:13 +0200
Guess you don't have execute permissions on "sendto"
chmod +x /[path to]/sendto should take care of that.
/Martin
Konstantin Wiesel skrev i meddelandet <7lcqif$[EMAIL PROTECTED]>...
>I installed Kernel 2.2.5 and the ethermnet interface
>is on subnet 192.168.0.0 with ip 192.168.0.200
>if i ping the broadcast adress 192.168.0.255
>or the net 192.168.0.0 both times i receive
>a message saying
>sendto: permission denied
>
>
>what is going on there?
>
------------------------------
From: Eran Dvey-Aharon <[EMAIL PROTECTED]>
Crossposted-To: redhat.networking.general
Subject: Re: can't ftp/telnet as root
Date: Wed, 30 Jun 1999 18:02:22 +0300
Hi Ron !
It took me more than a day to find out what is going on myself. I had
exactly the same problem, and still suffer from some related problems.
Well, ....
Redhat 6.0 installs by default it's securety system called PAM.
Basically, you can read more about PAM in your /usr/doc/pam* directory,
or in www.redhat.com site.
The PAM system has a configuration file for each opperation you can do.
The configuration files are located at /etc/pam.d directory , and the one
regareding ftp is 'ftp', the one regarding 'telnet' is telnet etc.
Each file has authentication rules. I'm sure after you read about it you
will be able to modify the rules. I'm still learning it myself, and don't
master it yet, but if you will not find the exact modification mail me, and
I'll find it for you.
One basic good advice is to hold a tail -f session to your syslog file. PAM
writes a lot of messages to syslog, and it is quite useful for debuging.
('tail -f /usr/log/messages')
Good luck , Eran
Ron Bombard wrote:
> Greetings!
>
> I know this is a simple thing, but I can't seem to figure it out.
>
> I just installed RedHat 6.0 and can't telnet or ftp into it from another
> host as root. any other login is fine, just root.
>
> what do I have to do???
>
> Thanks.
> --
> Ron Bombard, Network Administrator
> [EMAIL PROTECTED]
> PO Box 2567, Glens Falls, Ny 12801
> http://members.theglobe.com/virtual_ron
>
> Sometimes loosing a wife can be hard... in my
> case it was nearly impossible!!!
> ---------------------------------------------------
> _O_ _____ _<>_ ___
> / \ | | / \ / _ \
> |==/=\==| |[/_\]| |==\==/==| | / \ |
> | O O | / O O \ | >< | | |"| |
> \ V / /\ - /\ ,-\ () /-. \ X /
> /`---'\ /`---'\ V( `-====-' )V /`---'\
> O'_:_`O O'M|M`O (_____:|_____) O'_|_`O
> -- -- -- -- ---- ---- -- --
> STAN KYLE CARTMAN KENNY
------------------------------
From: Nicholas E Couchman <[EMAIL PROTECTED]>
Subject: Re: "invalid password" (Win95) using samba
Date: Wed, 30 Jun 1999 15:29:01 GMT
Don't set the login to windows, keep it at MS Networks. I just experienced the
same problem. Here's what you have to do. Make sure the username that you are
using on Win9x is the same as the one for the share you want to access on
Samba. Login as root on your Linux machine. Type the following:
smbpasswd -a username
You will be asked for a password. The "-a" will add the user to the smbpasswd
database (/etc/smbpasswd). You can use the -n option to set the password to
null (nothing). You should be able to access Samba shares, etc. I hope it
helps!!
--Nick
Bart wrote:
> I guess I'm faced with a "classic" problem, yet as a newbie I don't know how
> to solve it :-(
>
> Here it is:
> Samba is up and running.
>
> I log in on my Win95 machine [" client for Microsoft network" as primary
> network logon] using the same username & password as I have for Linux on my
> other machine.
>
> On my Win95 machine [network neighbourhood], I can see the shared folders.
> Clicking on them, I'm asked for the password. I fill in the password, and
> get an error-message saying that the password is incorrect...
>
> In my smb.conf file I have (among other things, but these seem to be
> important)
>
> security = user
> encrypt passwords = yes
>
> I'm really new to this stuff, so any hints are appreciated and thanked for
> in advance.
>
> B@rt
------------------------------
From: [EMAIL PROTECTED] (Greg Comeau)
Crossposted-To: comp.os.linux.development.apps,comp.os.linux.development.system
Subject: Re: Why not C++
Date: 30 Jun 1999 13:49:35 -0400
Reply-To: [EMAIL PROTECTED]
In article <7l6h61$[EMAIL PROTECTED]> [EMAIL PROTECTED] (Don Waugaman)
writes:
>In article <[EMAIL PROTECTED]>,
>Johan Kullstam <[EMAIL PROTECTED]> wrote:
>>[EMAIL PROTECTED] (Don Waugaman) writes:
>>
>>> In article <[EMAIL PROTECTED]>,
>>> Johan Kullstam <[EMAIL PROTECTED]> wrote:
>>>
>>> Which is as much a problem for the C code as for the C++ code, if not
>>> more so since schemes such as reference-counted objects is more
>>> difficult to implement in C.
>
>[ snip ]
>
>>and in C, mallocs tend to be rare. most C programs will malloc
>>everything they need right off the bat and keep hold of the memory
>>until they exit.
>
>I disagree with this generalization. I've seen numerous examples of
>C programs which will use malloc() / free() frequently during their
>execution.
>
>I would welcome correction if I am wrong. Has anyone seen any studies
>to either effect?
I've never seen any studies but would imagine that only the savviest of
C programmers would know about this.
>> however, C++ encourages more dynamic memory
>>exercising because its syntax hides the malloc/free somewhat.
>
>This *may* be true, but - again - this is a case of programmer choice.
>Nothing stops programmers from using the style that you describe for
>the C language. For many types of programs, less-powerful classes may
>be better than general classes which allocate consistently on the heap -
>thus a FixedSizeArray<> template may be preferable to using vector<> in
>some situations. However, when you need the additional power of the
>built-in classes, it's good to have them easily available.
This is a most excellent point.
In fact it's part of the beauty of C and C++ that other options
are available.
>>> >the memory fragmentation problem pretty much precludes seriously using
>>> >C++ for kernel work.
>>>
>>> I don't think that memory fragmentation is worse in C than in C++.
>>> It's true that some features of C++ can cause programmers to use
>>> dynamic memory more than in C. but that's an attribute of the use of
>>> the language, not of the language itself.
>>>
>>> What it means is that in areas where memory fragmentation is an issue,
>>> you'll have to be very careful about how you manage memory. This is
>>> an issue in C programs as well, of course. The difference is that you
>>> can use C++'s features to more easily move between different methods
>>> of memory and fragmentation management.
>>
>>in eg lisp you let your vendor take care of this for you.
>
>And your vendor may sometimes get it wrong. Will he guess correctly for
>every instance of a quick-and-dirty filter, an OS kernel, a daemon and
>a number-crunching application?
Yep, this BTQ, is exactly the problem with malloc and free.
Can you imagine that you are only presented with one implementation of it?
This ties in with, but does not necessarily replace, the various
levels of granularity allowed with C++'s 'new'.
>>C++ doesn't have insignificant runtime costs.
>
>Please name some of C++'s significant runtime costs (that we haven't
>already addressed above - namely, memory management issues).
I'm suspecting he said this as a reaction to all the comments that
C++ is efficient and so all he's saying is that some things do
have costs. If the OP means more than this, please chime in.
- Greg
--
Comeau Computing, 91-34 120th Street, Richmond Hill, NY, 11418-3214
Producers of Comeau C/C++ 4.2.38 -- New Release! We now do Windows too.
Email: [EMAIL PROTECTED] / Voice:718-945-0009 / Fax:718-441-2310
*** WEB: http://www.comeaucomputing.com ***
------------------------------
From: [EMAIL PROTECTED]
Subject: Re: DNS cache and database
Date: Wed, 30 Jun 1999 17:03:44 GMT
I don't know if this is exactly what your looking for but, this is the
site that I used to help my setup DNS cache on my PPP server(also HOWTO
DNS)
http://jgo.local.net/LinuxGuide/
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
From: [EMAIL PROTECTED] (Duncan Simpson)
Crossposted-To: comp.os.linux
Subject: Re: Newbie Question
Date: 30 Jun 1999 15:21:43 GMT
In <[EMAIL PROTECTED]> George Genovezos <[EMAIL PROTECTED]> writes:
>Hello,
>I am setting up apache and I need for someone to login to the server
>from a web site
>to restrict access. How do I do this?
Use .htaccesss files, equivilent restrictions in the main samba
configuration or (if you really have to) a CGI script that checks the
authorisiation before returning the document.
--
Duncan (-:
"software industry, the: unique industry where selling substandard goods is
legal and you can charge extra for fixing the problems."
------------------------------
From: [EMAIL PROTECTED] (Greg Comeau)
Crossposted-To: comp.os.linux.development.apps,comp.os.linux.development.system
Subject: Re: Why not C++
Date: 30 Jun 1999 13:15:42 -0400
Reply-To: [EMAIL PROTECTED]
In article <QGtd3.4830$[EMAIL PROTECTED]> [EMAIL PROTECTED] writes:
>Using the latest egcs (from CVS) to compile a C program, with options
>'-fno-exceptions -fno-rtti -O2', the C assembler output is still
>smaller (in terms of # of instructions, not symbol length) while
>producing the same results.
>
>C++ is still slower and bulkier.
I think that you know that you have not done a serious comparison here
and so any conclusion(s) you could possible make must be bogus.
- Greg
--
Comeau Computing, 91-34 120th Street, Richmond Hill, NY, 11418-3214
Producers of Comeau C/C++ 4.2.38 -- New Release! We now do Windows too.
Email: [EMAIL PROTECTED] / Voice:718-945-0009 / Fax:718-441-2310
*** WEB: http://www.comeaucomputing.com ***
------------------------------
From: "R Sweeney" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup,comp.os.linux.misc,comp.os.linux
Subject: Re: HELP! Netscape doesn't recognize dialed-up connections
Date: Thu, 1 Jul 1999 14:00:02 -0400
Sorry to bug you, but I am one step below you can you help me establish a
dial-up on my Linux machine?
Having problems since March.
If ya got da time
U.V. Ravindra <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]...
>
> I have SuSE 6.1 installed on my PC. Modem setup is fine. Connections
> are successfully established with my dial up server. DHCP works
> successfully after the connection is established with the server, and
> I am able to telnet/ftp to Unix boxes on the "other side"
> successfully.
>
> However, when I start up Netscape, it doesn't recognize the open
> connection. What could be going wrong? I've tried looking
> everywhere, but I can't see a single place in Netscape where I
> can set anything up with respect to this? If my local xterms
> are able to recognize the existence of the connection, why isn't
> my local Netscape able to do the same thing?
>
> Is it something in my network configuration files, perchance?
>
> Another question: is it possible to pop up X terms/windows on my
> Linux box (this side of the firewall, with its server assigned IP
> address and all) from the Unix boxes on the "other side"? How?
> (How will the Unix machine resolve the addess of my Linux box)?
>
> I tried export DISPLAY=<myLinuxBoxName>:0.0 but the Unix box
> spat in my face! :-(
>
> Thanks in advance for your help.
>
> --
> Ravindra
------------------------------
From: [EMAIL PROTECTED] (Greg Comeau)
Crossposted-To:
comp.os.linux.development.apps,comp.os.linux.development.system,comp.lang.c++
Subject: Re: Why not C++
Date: 30 Jun 1999 14:00:05 -0400
Reply-To: [EMAIL PROTECTED]
In article <[EMAIL PROTECTED]>
[EMAIL PROTECTED] (Isaac) writes:
>On Mon, 28 Jun 1999 07:55:12 +0200, Thomas Stuefe
><[EMAIL PROTECTED]> wrote:
>>
>>>> In my opinion, the only thing that C++ has over C is
>>>>better support for data encapsulation via classes and, possibly,
>>>>exception handling.
>>
>>Only is good.
>>
>
>I think the argument that the syntactical differences aren't compelling
>is supportable, although I don't agree with it. But even after dismissing
>things like // comments, declaring variables at point of use, class names
>as types, etc.
(Assuming dismissing it was ok :| )
>I still find the following 5 things the most compelling
>reasons to use C++ over C (roughly in decreasing order of importance)
>
>1) Data Encapsulation
>2) Inheritance
>3) Polymorphism
>4) STL library
>5) Templates
These would probably be on most folks top 10.
- Greg
--
Comeau Computing, 91-34 120th Street, Richmond Hill, NY, 11418-3214
Producers of Comeau C/C++ 4.2.38 -- New Release! We now do Windows too.
Email: [EMAIL PROTECTED] / Voice:718-945-0009 / Fax:718-441-2310
*** WEB: http://www.comeaucomputing.com ***
------------------------------
From: Eric Sandvik <[EMAIL PROTECTED]>
Subject: Re: third level domains
Date: Wed, 30 Jun 1999 13:04:57 -0500
==============8893E3015A6347E46A1E6A08
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
from the apache manual/vhost/name-based.html:
configuration files (most likely httpd.conf or srm.conf) code similar to the
following:
NameVirtualHost 111.22.33.44
<VirtualHost 111.22.33.44>
ServerName www.domain.tld
DocumentRoot /web/domain
</VirtualHost>
. . .
Additionally, many servers may wish to be accessible by more than one name.
For example, the example server might want to be
accessible as domain.tld, or www2.domain.tld, assuming the IP addresses
pointed to the same server. In fact, one might want it so
that all addresses at domain.tld were picked up by the server. This is
possible with the ServerAlias directive, placed inside the
<VirtualHost> section. For example:
ServerAlias domain.tld *.domain.tld
Note that you can use * and ? as wild-card characters.
use www.yourname.mydomain.com.au and use ServerAlias yourname.mydomain.com.au
and it should work.
Les Cole wrote:
> I think? I understand the various domains levels. But when trying to set
> up a third level domain I don't understand why I cannot put "www" before
> "yourname.mydomain.com.au" in the URL. That is when I type in
> "yourname.mydomain.com.au" I get the correct index page, when I type in
> "www.yourname.mydomain.com.au" I get "cannot find server or DNS error" in
> the browser. I have submitted "www", "mail" and "yourname" as hosts to my
> primary nameserver (provided by my ISP)(should I set up my own
> nameservers?).
>
> I am sharing an IP number with "www.mydomain.com.au", my entry in
> httpd.conf (apache-mod_ssl 1.3.6.2.3.2-0)is:-
>
> NameVirtualHost xxx.xxx.xxx.xxx
>
> <VirtualHost yourname.mydomain.com.au>
> ServerName yourname.mydomain.com.au
> IndexOptions FancyIndexing
> DirectoryIndex index.html index.htm
> DocumentRoot /home/yourname
> ServerAdmin [EMAIL PROTECTED]
> ErrorLog /var/log/httpd/yourname-error_log
> TransferLog /var/log/httpd/yourname-access_log
> <VirtualHost>
>
> <VirtualHost www.mydomain.com.au>
> ServerName www.mydomain.com.au
> DocumentRoot /home/mydomain
> ServerAdmin [EMAIL PROTECTED]
> ErrorLog /var/log/httpd/mydomain-error_log
> TransferLog /var/log/httpd/mydomain-access_log
> <VirtualHost>
>
>
==============8893E3015A6347E46A1E6A08
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
from the apache manual/vhost/name-based.html:
<P>configuration files (most likely httpd.conf or srm.conf) code similar
to the following:
<P> NameVirtualHost 111.22.33.44
<P> <VirtualHost 111.22.33.44>
<BR> ServerName www.domain.tld
<BR> DocumentRoot /web/domain
<BR> </VirtualHost>
<P>. . .
<P>Additionally, many servers may wish to be accessible by more than one
name. For example, the example server might want to be
<BR>accessible as domain.tld, or www2.domain.tld, assuming the IP addresses
pointed to the same server. In fact, one might want it so
<BR>that all addresses at domain.tld were picked up by the server. This
is possible with the ServerAlias directive, placed inside the
<BR><VirtualHost> section. For example:
<P> ServerAlias domain.tld *.domain.tld
<P>Note that you can use * and ? as wild-card characters.
<P>use www.yourname.mydomain.com.au and use ServerAlias yourname.mydomain.com.au
and it should work.
<P>Les Cole wrote:
<BLOCKQUOTE TYPE=CITE>I think? I understand the various domains levels.
But when trying to set
<BR>up a third level domain I don't understand why I cannot put "www" before
<BR>"yourname.mydomain.com.au" in the URL. That is when I type in
<BR>"yourname.mydomain.com.au" I get the correct index page, when I type
in
<BR>"www.yourname.mydomain.com.au" I get "cannot find server or DNS error"
in
<BR>the browser. I have submitted "www", "mail" and "yourname" as hosts
to my
<BR>primary nameserver (provided by my ISP)(should I set up my own
<BR>nameservers?).
<P>I am sharing an IP number with "www.mydomain.com.au", my entry in
<BR>httpd.conf (apache-mod_ssl 1.3.6.2.3.2-0)is:-
<P>NameVirtualHost xxx.xxx.xxx.xxx
<P><VirtualHost yourname.mydomain.com.au>
<BR>ServerName yourname.mydomain.com.au
<BR>IndexOptions FancyIndexing
<BR>DirectoryIndex index.html index.htm
<BR>DocumentRoot /home/yourname
<BR>ServerAdmin [EMAIL PROTECTED]
<BR>ErrorLog /var/log/httpd/yourname-error_log
<BR>TransferLog /var/log/httpd/yourname-access_log
<BR><VirtualHost>
<P><VirtualHost www.mydomain.com.au>
<BR>ServerName www.mydomain.com.au
<BR>DocumentRoot /home/mydomain
<BR>ServerAdmin [EMAIL PROTECTED]
<BR>ErrorLog /var/log/httpd/mydomain-error_log
<BR>TransferLog /var/log/httpd/mydomain-access_log
<BR><VirtualHost>
<BR>
<BR><A HREF="http://www.searchlinux.com"></A> </BLOCKQUOTE>
</HTML>
==============8893E3015A6347E46A1E6A08==
------------------------------
From: "Fomer" <[EMAIL PROTECTED]>
Subject: Linux to Win98 running WinProxy
Date: Wed, 30 Jun 1999 13:59:58 -0400
Hi all,
Got a problem here. I have a WinDoze 98 machine running WinProxy and a
Linux (OpenLinux 2.2) box connecting through the 98 machine to the Internet.
Everything works fine for browsing, downloading, email, etc. but when it
comes time to do anything else I get a "network unreachable" error. I was
thinking that it has something to do with not being able to resolve the
names of the servers I am trying to reach, any suggestions?
One other thing....I can't ping my IP DNS server from the Linux box....it
gives me the "network unreachable" error.
Examples,
I can't connect to Seti@home or RC5Des servers....I get "network
unreachable" in Seti@home and "unable to resolve..." in RC5.
--
Fomer
Small is the number of them that see with there own eyes
and feel with their own hearts.
- Albert Einstein
------------------------------
From: [EMAIL PROTECTED] (Jon Skeet)
Crossposted-To:
comp.os.linux.development.system,comp.os.linux.misc,comp.os.linux.security
Subject: Re: Remote login problems in custom RedHat env...
Date: Wed, 30 Jun 1999 16:20:48 +0100
[EMAIL PROTECTED] wrote:
> I have an unusual problem with telnet, rlogin, ftp and any other
> program which requires logging in remotely. The system specs are: 400Mhz
> Pentium Pro, 256MB RAM, onboard Intel etherexpress pro 10/100Mbs network
> card, 2 serial ports, running a custom Red Hat 5.2 kernel. Four kernel
> header files were modified to allow for a 3072 process limit ( fs.h,
> limits.h, posix_types.h, /usr/include/gnu/types.h ). The machine will
> boot and run fine for about 10 minutes then any form of remote log in
> (even rcp and rsh) will hang after it successfully connects to the
> system just before it gives you the opportunity to provide your login
> name and/or password. On telnet you can even see the "Connected to
> <host>" message. Any connection made before this problem occurs is fine
> and has full capabilities. I can get out of the box using any method I
> choose (telnet, ftp, etc). The oddest thing about this problem is that
> all other inetd services are unaffected. They continue to respond to
> request on their respective ports without fail. A tcpdump on the machine
> will show telnet, rlogin, etc ... activity. They send their initial acks
> and replies but don't complete their initialization procedures.
Is it feasible that the problem is in reverse host lookup? I know telnetd
checks that the host that is telnetting to it is valid before going ahead
with the connection; it's possible that rcp does the same. If so,
possibly your DNS is going wrong...
--
Jon Skeet - [EMAIL PROTECTED]
http://www.pobox.com/~skeet/
------------------------------
From: Mark Evans <[EMAIL PROTECTED]>
Subject: Re: DHCP flooded cable network!!
Date: Wed, 30 Jun 1999 19:08:58 +0100
Ed Davis <[EMAIL PROTECTED]> wrote:
> Hi,
> I have had Linux running for almost a year now using ipfwadm to connect 2
> other home computers running windoze. Today the cable internet provider
> called me and said they had to shut down my connection because I was
> flooding the network with requests for an IP address, thousands of requests.
> They said either I had a wrong DHCP configuration (stock redhat config) or
Ask them if *they* have changed anything associated with their DHCP
set up.
Also ask them for logs of these packets.
--
Mark Evans
St. Peter's CofE High School
Phone: +44 1392 204764 X109
Fax: +44 1392 204763
------------------------------
From: [EMAIL PROTECTED]
Subject: Re: Proxim Symphony
Date: Wed, 30 Jun 1999 16:02:34 GMT
On Wed, 30 Jun 1999 13:36:45 GMT, Albert C. Lee
<[EMAIL PROTECTED]> wrote:
>
>> Does one really need the Ethernet Bridge? It's pretty pricey. I
>> figure, what's the real difference between using a Modem and a Cable
>> Modem? Why would one need an Ethernet Bridge if one is using a Cable
>> Modem? An Ethernet Hub perhaps, but why the bridge?
Hi Albert,
You got me hooked. Please help me a little further (my ESPP just went
ballistic, so I think I can now afford a wireless network :-)).
What applications can I run over the Symphony wireless network? All
TCP/IP applications such as ssh, telnet, ftp, nfs, http, samba, and
etc. ?
I am now daydreaming about my 98 & NT & Linux boxes interoperate
'airly' :-)
Thanks,
Dan
>Hi Dan,
>
>Well, most (if not all) cable modems are equipped with RJ-45 10bT jacks
>instead of serial ports (for regular analog modems), so it needs to talk
>to a network device. My modem (3Com 56k LAN) is one of a few solutions
>out there that sits a 56k modem on the LAN like a cable modem.
>
>If you have only 1 wireless client (a laptop), the Ethernet bridge
>connects directly to the cable modem and the bridge talks to the laptop.
>
>If you have a LAN already, and want a wireless client, the bridge is the
>only solution to adding a wireless client, short of making the proxy
>server on your LAN a wireless client also.
>
>The bridge is *VERY* pricey, but is the cheapest solution I could find
>that would allow me to connect my laptop wirelessly to an existing LAN.
>Most Ethernet bridges run between $900-$1500, and each wireless client
>costs between $350-$500.
>
>Proxim has a very strong reputation in the wireless LAN industry, and
>part of what you're paying for is name. But overall, I have found that
>with the name comes exceptional performance, and ease of setup.
>
>-Al
>--
>Nikon CP950 Samples: http://www.cavecreations.com/cp950
>
>
>Sent via Deja.com http://www.deja.com/
>Share what you know. Learn what you don't.
------------------------------
From: [EMAIL PROTECTED] (Greg Comeau)
Crossposted-To: comp.os.linux.development.apps,comp.os.linux.development.system
Subject: Re: Why not C++
Date: 30 Jun 1999 14:11:46 -0400
Reply-To: [EMAIL PROTECTED]
In article <gmVd3.97285$[EMAIL PROTECTED]> [EMAIL PROTECTED] writes:
>On Mon, 28 Jun 1999 19:43:39 GMT, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>>Look at the above, and what I quoted from Nathan Myers:
>>
>> "[...]Take for example Egcs. C and C++, same code generator,
>> same optimizer."
>>
>>My point was that C++ output is still bigger than C, _for the exact same
>>source code_, using the same code generator and optimizer.
>
>...Which basically goes to say that the C++ implementation is not as
>*mature* as the C implementation.
Or there is a bug or ...
>They may both share the same peephole optimizer; they may both share the
>same RTL code generators.
>
>But they manifestly *do not* share the same parse tree generator.
>(That's kind of the point of them being separate compiler front ends.)
>
>It is quite evident that the front ends generate code differently, and
>this nicely explains the differences in behaviour.
>
>It is manifestly true that G++ FE != GCC FE, and it is pretty evident
>that the GCC FE is *vastly* more mature. Which strikes me as obvious; I
>was using GCC (ANSI C) ten years ago, and considered it quite stable,
>when G++ was not even worth considering.
>
>All of this being said, it is possible for the code generator for C++
>(particularly for EGCS) to persistently underperform the C code
>generator, due to the following two factors:
>a) They are separate.
>b) C++ is a more complex language, thereby making it more difficult to
>write a generator producing code that is both correct and efficient.
Is this really the only two factors you could come up with?
As such, your thinking is biasing the factors.
>Don't misread that as a claim that the complexity makes it inherently
>*impossible* to make a C++ implementation more efficient; it merely
>indicates that it is a difficult task.
So is writing a C compiler, blah blah blah.
- Greg
--
Comeau Computing, 91-34 120th Street, Richmond Hill, NY, 11418-3214
Producers of Comeau C/C++ 4.2.38 -- New Release! We now do Windows too.
Email: [EMAIL PROTECTED] / Voice:718-945-0009 / Fax:718-441-2310
*** WEB: http://www.comeaucomputing.com ***
------------------------------
From: Ken R. <[EMAIL PROTECTED]>
Subject: laptop pcmcia interrupts
Date: Wed, 30 Jun 1999 18:14:51 GMT
I made my Dell Latitude cpi266xt dual win98/RH6.0. It came with a
LAN/modem 3com 3c575. I chechked and this driver is in RH6.0, however
when the serveces start up at boot I get a interrupt error(conflicting,
i think it says unavailable). How/what do I change to fix this. If
there is any other problems anyone sees with this install that might
help make it go smoother, please post or e-mail me. Thanks. Ken R.
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.
------------------------------
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