Linux-Networking Digest #2, Volume #12           Sun, 25 Jul 99 13:13:35 EDT

Contents:
  Re: PPP Problems RH 6.0 (Clifford Kite)
  Re: PPP Error (Clifford Kite)
  Re: help with chat script or kppp!!!  (spurasonic II v.90 ISA) (Clifford Kite)
  Re: Good Stuff, HTML, CGI, PERL, APACHE, LINUX and more ("akolk - gelrevision.nl")
  I found another useful site supporting Linux Networking? ("sk")
  Re: NT+Linux+lots of subnets ("Chris Briggs")
  Re: PPP connection doesn't work (CNelson)
  Re: PPP connection doesn't work (Clifford Kite)
  Linux and ADSL how to----does one exist?? (sparks)
  Re: PPP connection doesn't work (CNelson)
  Re: PPP connection doesn't work ("Gene Heskett")
  Re: ipchains not recognized by 2.2.5 kernel? (Monte Phillips)
  Re: Block specific IP with ipchains? (Sitaram Chamarty)
  Re: PPP Server Problem - Log file snippets attached (W.G. Unruh)
  Re: RH6 Linux Router Craps Out?! (Alexandra Dulaunoy)
  Re: delay eth1 initialization... why am i getting this?? ("mikes")
  PPP routing problem ("Sergei O. Naoumov")
  Please help with my sendmail setup... ("Eric Wirt")
  tcpdump and RH6.0 - anyone get it to work? (Bryan)

----------------------------------------------------------------------------

From: kite@NoSpam.%inetport.com (Clifford Kite)
Subject: Re: PPP Problems RH 6.0
Date: 25 Jul 1999 08:09:35 -0500

Marc Warren ([EMAIL PROTECTED]) wrote:
: This is a multi-part message in MIME format.
: --------------58ECDB66458F747377B48767
: Content-Type: text/plain; charset=us-ascii
: Content-Transfer-Encoding: 7bit

: I've recently installed RH 6.0 on what was my Win 95 box and have not
: succeeded in connecting to the Internet through my ISP.I have logged the ppp
: stuff and it looks like it accepts my PAP name and password; I get "Login
: Succeeded", I also receive a local and remote IP address, which I can then see
: with ifconfig. The tail end of the log shows some CCP negotiations that
: apparently time out ; this doesn't seem to cause a failure, though. My problem
: is that with pppd "up" I get no response to ping (100% lost packets) or
: nslookup. Netscape hangs forever. If I try to telnet to one of the ISP's DNS
: addresses, I can get a"UNIX 4.x" and a login: message, so I'm connecting to
: Someone! Any ideas? (will try to attach files here...)I appologize for the

This usually a resolver problem.  Do you have good nameservers configured
in /etc/resolv.conf and the syntax correct.  man 5 resolver.

: format of the attached files... haven't figured out how to edit them yet.
: Thanks!

They look OK to me, but they would look better if you posted in plain
text rather than using mime. :)

Here's a couple of pointers, unrelated to your problem.

You are using 14400 for the pppd speed option and that isn't valid for
pppd so pppd is using it's default 9600.  19200 is the nearest valid
speed above 14400 but you might want to try something higher.  I use
115200 with a 33.6 modem - this is the maximum speed of the serial
port UART.

Your chat script uses  CONNECT '' or  CONNECT "" which sends a carriage
return that can cause the connection to fail by confusing the ISP.
Replacing it with  CONNECT '\d\c' or  CONNECT \d\c  will insert a pause
of one second and supress the carriage return.   The first form is for
a chat script that chat gets from it's argument list and the second is
for a chat script defined by the -f chat argument.  I think removing
the expect/send that begins with ` ~ ' might be appropriate too since
the ISP didn't start link negotiations until this timed out (the abort)
and pppd started sending.

You and the peer have no common CCP algorithms and you can save disk
space by using the pppd noccp option.

--
Clifford Kite <kite@inet%port.com>                    Not a guru. (tm)
/* Speak softly and carry a +6 two-handed sword. */

------------------------------

From: kite@NoSpam.%inetport.com (Clifford Kite)
Subject: Re: PPP Error
Date: 25 Jul 1999 08:37:15 -0500

[EMAIL PROTECTED] wrote:
: Hi,
: I am trying to connect to my ISP from my Red Hat linux 6.0.
: I used the netcfg tool to setup the ppp. Looking at the syslog messages
: it appears that the connection is made but fails after .6 mins saying

: Jul 24 21:45:18 localhost pppd[621]: LCP: timeout sending
: Config-Requests
: Jul 24 21:45:18 localhost pppd[621]: Connection
: terminated.
: Jul 24 21:45:18 localhost pppd[621]: Connect time 0.6 minutes.

: Jul 24 21:45:18 localhost pppd[621]: Receive serial link is not 8-bit
: clean:
: Jul 24 21:45:18 localhost pppd[621]: Problem: all had bit 7 set to 0

It almost always means the chat script has failed to give the ISP what
it needs to start it's PPP and it is displaying menu or text prompt.

A common thing not in the PPP-HOWTO is using a  CONNECT ''  chat
expect/send string which sends a carriage return to the ISP.  Using
CONNECT '\d\c'  is better, this pauses for a second and supresses the
carriage return.  If the chat script is specified by the -f chat option
then use just  \d\c  in this expect/send.

While your chat script does sent this carriage return it's more likely
that the immediate cause of failure is that the IRQ configured for the
device file (/dev/ttyS? for the modem) is not the IRQ that the modem
actually uses.  The difference between the time stamps for when the ATZ
is sent to the modem and the time that the modem responds with OK is
29 seconds:


: Jul 24 21:43:38 localhost chat[626]: send (ATZ^M)
: Jul 24 21:43:38 localhost chat[626]: expect (OK)
: Jul 24 21:44:07 localhost chat[626]: ATZ^M^M
: Jul 24 21:44:07 localhost chat[626]: OK

This much too long, it should be less than a second.  I'm accustomed
to a 19 second difference for a misconfigured IRQ but still this large
difference could probably not happen any other way.

The solution is to configure the IRQ for the device file to that used
by the modem.  This is done by setserial in one of the boot-up files. 

--
Clifford Kite <kite@inet%port.com>                    Not a guru. (tm)
/* I gave up on politics when no matter who I voted for, I regretted it.
 *    -- Pepper...and Salt, WSJ */

------------------------------

From: kite@NoSpam.%inetport.com (Clifford Kite)
Crossposted-To: redhat.config,redhat.networking.general
Subject: Re: help with chat script or kppp!!!  (spurasonic II v.90 ISA)
Date: 25 Jul 1999 08:50:36 -0500

Wilson Lin ([EMAIL PROTECTED]) wrote:
: I just installed RH6.0 yesterday.  I am having problem connecting with my 
: ISP.  

[edited]

: Jul 25 06:08:50 sonata chat[1931]: send (ATZ^M)
: Jul 25 06:08:50 sonata chat[1931]: expect (OK)
: Jul 25 06:09:09 sonata chat[1931]: ATZ^M^M
: Jul 25 06:09:09 sonata chat[1931]: OK
: Jul 25 06:09:09 sonata chat[1931]:  -- got it 

Look at the time difference between the timestamp for "send (ATZ^M)"
and the timestamp for when the modem OK appears.  This 19 second delay
shows, without any doubt, that the IRQ configured for the device file
(/dev/ttyS2) is not the IRQ that the modem actually uses.

The configuration is done by setserial in one of the boot-up files.
The usual solution is to configure the device file for the IRQ that the
modem actually uses.

--
Clifford Kite <kite@inet%port.com>                    Not a guru. (tm)
/* 97.3% of all statistics are made up. */

------------------------------

From: "akolk - gelrevision.nl" <[EMAIL PROTECTED]>
Subject: Re: Good Stuff, HTML, CGI, PERL, APACHE, LINUX and more
Date: Sun, 25 Jul 1999 15:29:36 +0200

Yep lots of stuff (but it ain't any good) .......

Upali Weerasinghe wrote:

> I put lots of pages and time on Internet; Anyone who wants to learn
> this will help.
>
> http://upnet.dyndns.com/linux/doc
> http://upnet.dyndns.com
>
> You must try this and it's Free
> http://upnet.dyndns.com/upali/Que/Webpages/quebooks.htm
>
> Also you can download RedHat Linux from
>
> ftp://http://upnet.dyndns.com/


------------------------------

From: "sk" <[EMAIL PROTECTED]>
Subject: I found another useful site supporting Linux Networking?
Date: Sun, 25 Jul 1999 14:45:17 GMT

I found some thing real useful to me here.

Suresh Kumar
John <"jmiller"@.provide.net> wrote in message
<[EMAIL PROTECTED]>...
>I've gotten a recent tulip driver and compiled it.  The new module loads
>ok.  Everything seems ok when I check route and ifconfig.  I can ping my
>own card, but I can't ping outside my card.  There's no sign of any
>network activity coming out of the card.  I have a dual install with
>Win98 and can use the interface card in windows with no problem, so I
>assume the hardware is alright.
>
>Rod Smith wrote:
>>
>> [Posted and mailed]
>>
>> In article <[EMAIL PROTECTED]>,
>>         John <"jmiller"@(nospam).provide.net> writes:
>> > I having a rough time getting my Linksys Etherfast 100/10 card working
>> > under Caldera OpenLinux 2.2 (kernel 2.2.5).  I've updated the tulip
>> > driver with no luck.
>> >
>> > Is anyone running Linksys cards with Linux?  If so what distribution
and
>> > kernel level?.
>>
>> These Linksys boards are pretty popular, actually.  Could you be more
>> precise about the problems you're having?
>>
>> --
>> Rod Smith
>> [EMAIL PROTECTED]
>> http://www.channel1.com/users/rodsmith
>> NOTE: Remove the "uce" word from my address to mail me
>> Author of _Special Edition Using WordPerfect for Linux_, from Que



------------------------------

From: "Chris Briggs" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.misc,redhat.networking.general
Subject: Re: NT+Linux+lots of subnets
Date: Sun, 25 Jul 1999 09:37:48 -0400

On the NT box with the 4 NICs is routing enabled?  Look under the TCP/IP
properties to find out, make sure that the IP forwarding box is checked.



------------------------------

From: CNelson <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup
Subject: Re: PPP connection doesn't work
Date: Sun, 25 Jul 1999 23:20:23 +0800
Reply-To: [EMAIL PROTECTED]

Hi,

I just tested the a0000 setting and it works! I can ping and telnet to all
hosts in my intranet.  However, I found in PPP-HOWTO, the setting used by
author is 0 instead of a0000. That is why I set it to 0 in my client's option
file.

Should it be in server's option file or client's or both of them? I set it in
both of them.

Thanks

Nelson

Clifford Kite wrote:

> Gene Heskett ([EMAIL PROTECTED]) wrote:
>
> : Most tty implementations are sensitive to xon/xoff characters in the
> : data going by, so those are normally 'escaped'.  To do that, one sets
> : the asyncmap to 0x000a0000.  Your setting it to 0x0 might leave you open
> : for some unexplained transmission freezes.
>
> These are two Linux boxes, the a0000 trick is used for some ISPs with
> a broken PPP implementation with respect to ACCM negotiation.  It has
> to do with escaping characters in PPP not with xon/xoff, the broken
> PPP implementation escapes characters in violation of the agreement
> reached in the link negotiations and the PPP RFC.
>
> --
> Clifford Kite <kite@inet%port.com>                    Not a guru. (tm)
> /* Better is the enemy of good enough. */


------------------------------

From: kite@NoSpam.%inetport.com (Clifford Kite)
Crossposted-To: comp.os.linux.setup
Subject: Re: PPP connection doesn't work
Date: 25 Jul 1999 09:47:29 -0500

Gene Heskett ([EMAIL PROTECTED]) wrote:

: Most tty implementations are sensitive to xon/xoff characters in the
: data going by, so those are normally 'escaped'.  To do that, one sets
: the asyncmap to 0x000a0000.  Your setting it to 0x0 might leave you open
: for some unexplained transmission freezes.

These are two Linux boxes, the a0000 trick is used for some ISPs with
a broken PPP implementation with respect to ACCM negotiation.  It has
to do with escaping characters in PPP not with xon/xoff, the broken
PPP implementation escapes characters in violation of the agreement
reached in the link negotiations and the PPP RFC.

--
Clifford Kite <kite@inet%port.com>                    Not a guru. (tm)
/* Better is the enemy of good enough. */

------------------------------

From: [EMAIL PROTECTED] (sparks)
Subject: Linux and ADSL how to----does one exist??
Date: Sun, 25 Jul 1999 15:11:08 GMT

They are installing ADSL in my area next month.
I wanted to put the adsl into my linux box and use
it as a server for my pc's 
Well Can you play games on the net thru the linux box?
I have been told that most net games will NOt play this way
is this true?
Have read that it will work with MAJOR mods to masquerading
and/or firewall to get this to work and by then you might
as well forget protection, all games are different and you
end up opening up you whole system if you play a lot of 
different games on the net.
100 ports here and 10 ports there and on and on for each
game you want to allow thru.
Is this really an open hole OR are the ports they are talking
about set to ONLY allow a certain game thru and nothing else?

thanks for any and all help, readme's or what ever I need to
decide about the linux box as a server or just connect the
adsl to my pc and say to hell with the rest.

jerry




------------------------------

From: CNelson <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.setup
Subject: Re: PPP connection doesn't work
Date: Sun, 25 Jul 1999 23:19:43 +0800
Reply-To: [EMAIL PROTECTED]

Hi,

I just tested the a0000 setting and it works! I can ping and telnet to all
hosts in my intranet.  However, I found in PPP-HOWTO, the setting used by
author is 0 instead of a0000. That is why I set it to 0 in my client's option
file.

Should it be in server's option file or client's or both of them? I set it in
both of them.

Thanks

Nelson

Clifford Kite wrote:

> Gene Heskett ([EMAIL PROTECTED]) wrote:
>
> : Most tty implementations are sensitive to xon/xoff characters in the
> : data going by, so those are normally 'escaped'.  To do that, one sets
> : the asyncmap to 0x000a0000.  Your setting it to 0x0 might leave you open
> : for some unexplained transmission freezes.
>
> These are two Linux boxes, the a0000 trick is used for some ISPs with
> a broken PPP implementation with respect to ACCM negotiation.  It has
> to do with escaping characters in PPP not with xon/xoff, the broken
> PPP implementation escapes characters in violation of the agreement
> reached in the link negotiations and the PPP RFC.
>
> --
> Clifford Kite <kite@inet%port.com>                    Not a guru. (tm)
> /* Better is the enemy of good enough. */


------------------------------

Date: 25 Jul 99 09:22:51 -0500
From: "Gene Heskett" <[EMAIL PROTECTED]>
Subject: Re: PPP connection doesn't work
Crossposted-To: comp.os.linux.setup

Unrot13 this;
Reply to: <[EMAIL PROTECTED]>

Gene Heskett sends Greetings to CNelson ;

>> The tcpdump shows ping data when pinging from client to server and
>> netstat -i shows RX errors at the server - right?  The vice versa I take
>> to mean that tcpdump shows ping data on the server when pinging from
>> the server to the client and netstat -i shows RX errors at the client.
>>

> Not really. RX error only show up on client side.

>>
>> I still can't explain what's going on.  But try using the pppd option
>> kdebug 7 on whichever box the RX errors appear with some Linux-to-Linux
>> test scenario.  This produces a hex dump of all the link negotiations
>> and all the data sent and received by pppd.  It's a last resort but
>> maybe that can shed some light on what's happening.

> I have put kdebug 7 on both side. Here are the dump file. I can see there
> are FCS error show up on client side. Not server side.  I first ping from
> client to server and then ping from server side to client side again.

> I'd glad if you can have some finding from them. Thank you

I'm gonna snip this huge log, and point out that there is a potential
problem in the pppd setup.

Most tty implementations are sensitive to xon/xoff characters in the
data going by, so those are normally 'escaped'.  To do that, one sets
the asyncmap to 0x000a0000.  Your setting it to 0x0 might leave you open
for some unexplained transmission freezes.

This is normally entered in the ppp 'options' window as

 asyncmap 0x000a0000

Cheers, Gene
-- 
  Gene Heskett, CET, UHK       |Amiga A2k Zeus040 50 megs fast/2 megs chip
    Ch. Eng. @ WDTV-5          |A2091,GuruRom,1g Seagate,CDROM,Multiface III
                               |Buddha + 4 gig WDC drive, 525 meg tape
                               |Stylus Pro, EnPrint, Picasso-II, 17" vga
         RC5-Moo! 690kkeys/sec isn't much, but it all helps
email gene underscore heskett at iolinc dot net
-- 


------------------------------

From: [EMAIL PROTECTED] (Monte Phillips)
Subject: Re: ipchains not recognized by 2.2.5 kernel?
Date: Sun, 25 Jul 1999 14:59:24 GMT

First, if it were me I would upgrade that kernel to at least .9 or .10

That said, back to the prob at hand:  Have you made sure that all
firewalling etc services and functions are enabled in the kernel?


 Chip Buck <[EMAIL PROTECTED]> wrote:
>Linux and the windows computer talk fine via samba
>Linux runs wonderfully with the cable modem.
>
>When I type ipchains --version I get 1.3.8
>When I try to enter other Ipchains commands
>I get an error telling me  "Ipchains : incompatible with Kernel"
>


------------------------------

From: [EMAIL PROTECTED] (Sitaram Chamarty)
Subject: Re: Block specific IP with ipchains?
Date: 19 Jul 1999 22:34:35 -0700

On Sun, 18 Jul 1999 20:49:27 GMT, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>I am on a corporate network with 5 of my buddies
>running redhat 6.0.  At times someone will
>occasionally export DISPLAY=<my IP> and launch
>xsnow or xmelt or something.  I want to be able to
>block all traffic from their IP addressess while
>allowing me to contact them if necessary.  I have
>installed ipchains and used the following command

If that's all your problem is, ipchains is overkill.  Just use
"xhost" or - even better, the xauth mechanism for controlling who
gets access to your X server.

If there are other issues you didn't mention, perhaps ipchains is
worth it.

------------------------------

From: [EMAIL PROTECTED] (W.G. Unruh)
Subject: Re: PPP Server Problem - Log file snippets attached
Date: 25 Jul 99 15:19:59 GMT

Ted Wagner <[EMAIL PROTECTED]> writes:

>I'm attempting to set up a PPP Server to dial into.

>I am able to get the modems to connect, but when my Win95 or Win98
>clients attempt to send a username and password, they are rejected.
...
>/AutoPPP/ - @ /sbin/pppd +pap login

The login option does not say to ppp, just use login, it says 
use <<<<both pap and login. Ie, the login must pass both 
pap-secrets AND /etc/password, not either. 

<one way is to put the blank password and * username into pap-secrets.
Read man pppd.

       Furthermore, if the login option was specified, the  user-
       name  and  password  are  also  checked against the system
       password database.  Thus, the system administrator can set
       up  the  pap-secrets file to allow PPP access only to cer-
       tain users, and to restrict the set of IP  addresses  that
       each  user  can  use.   Typically,  when  using  the login
       option, the secret in /etc/ppp/pap-secrets  would  be  "",
       which  will match any password supplied by the peer.  This
       avoids the need to have the same secret in two places.


>(Note, I'm using RedHat 6.0 and pppd is in sbin and not /usr/sbin)

>Here's what my mgetty.config looks like:

>port ttyS1
>init-chat "" AT&F&C1&D2
>speed 115200

>My /etc/inittab has the following line appended to it:

>S1:2345:respawn:/sbin/mgetty -s 115200 -n 2 -D /dev/ttyS1

>I've also tried:

>S1:2345:respawn:/sbin/mgetty ttyS1 -s 115200 -n 2 -D /dev/ttyS1

>(both have the same result)

>My /ppp/options looks like this:

>asyncmap 0
>netmask 255.255.0.0
>proxyarp
>lock
>crtscts
>auth
>login
>modem
>ms-dns (my primary dns)
>ms-dns (my secondary dns)

>(I've also tried this options file without the 'auth' and 'login'
>parameters with no luck).

>My goal is to have the login process use the system's password files so
>I only have to enter accounts in one place.

>A user logs in, they get connected, and they are able to work on their
>projects using telnet to the console or they can also browse the web
>through their connection.

>Any ideas?

>Thanks

>Ted

>--
>Ted Wagner - The world is full of fascinating
>problems waiting to be solved.

>http://members.tripod.com/~TedWagner/index.html


>Sent via Deja.com http://www.deja.com/
>Share what you know. Learn what you don't.

------------------------------

From: Alexandra Dulaunoy <[EMAIL PROTECTED]>
Subject: Re: RH6 Linux Router Craps Out?!
Date: Sun, 25 Jul 1999 18:07:36 +0100

Matt Siemens wrote:

> Hi,
>
> At work I set up a Linux machine to fuction as a router between 3 public
> ethernet segments.  Everything seems to work fine until traffic begins
> to pick up, then the router gets EXTREMELY slow, which in turn slows
> down everything on the nework segments.  The machine we're using is a
> Celeron 400 MHz with 64 MB of RAM and a 128 MB swap partition.  It's
> routing between public addresses and no masquerading or firewalling code
> has been compiled into the kernel (2.2.9). The machine has 3 3COM 905B
> cards in it.  Network traffic going through the box is not of
> overwhelming proportions and from a hardware stand point, the machine
> should be able to do the task without a problem.
>
> I've tried many different kernel versions, but this doesn't seem to make
> a difference.  I'm using the "Optimize as router not host" option and
> all verbose routing messages and netlink device emulation is enabled,
> but things still come to a grinding halt.  I checked the system logs to
> see if anything obvious shows up, but no dice.  I've switched all 3
> ethernet cards, and that doesn't do anything either.
>
> Can anyone shed some light on this?  Can Linux effectively do routing
> between more than 2 networks?  Is it just me? ;-)
>
> Any info on this would be very much appreciated!
>
> --Matt

I use a redhat 6.0 with 5 five ethernet card (Digital card).
I use some masquerading on eth1 & eth2, basic routing between eth3 & eth4 ,
brigding between eth0 & eth1.

It's a PentiumII-350 Mghz and 64 Mb. It's working really well (the setup
was not easy 8-) PCI-plug&play). The bandwidth is really good and i use
snmpd for getting statistics from all interface.

A lot cheaper than a cisco-3640 with 5 Ethernet interface. 8-)

Could you send the routing table ?

have you make some test with traceroute command and so on ?

alx





------------------------------

From: "mikes" <[EMAIL PROTECTED]>
Subject: Re: delay eth1 initialization... why am i getting this??
Date: Sun, 25 Jul 1999 11:10:04 -0500
Reply-To: "mikes" <[EMAIL PROTECTED]>

That's because one of your cards arent being detected. If you use Linuxconf
to set up your cards under Basic host information, enter the I/O and IRQ's
of both cards in both Net devices:

Eth0
I/O port (opt) 0x340, 0x300
Irq 11, 12

Eth1
I/O port (opt) 0x340, 0x300
Irq 11, 12

In your /etc/conf.modules, add:

alias eth0 ne
alias eth1 ne
options ne io=0x340, 0x300 irq=11,12

That should do it...

-Mike

Live 2 Ride wrote in message ...
>having a problem with 2 nics in one box. red hat 5.2 (kernel 2.2) isa non
plug

<snip>
>when they are both set up to run one will initialize the other will say
>"delay eth1 initialization" and thats all it will do.




------------------------------

From: "Sergei O. Naoumov" <[EMAIL PROTECTED]>
Subject: PPP routing problem
Date: 25 Jul 1999 15:43:50 GMT



Hi!
I am now setting up a PPP link from my work to home. Everything seems to
be working except the routing. The server is also a Linux box where IP4
forwarding is enabled. However, my pings still do not go further than
the server. One peculiar thing is that the network is cut onto the
segments of 32, so my mask in /etc/ppp/options is 225.255.255.224 but
this seems to be right.

Does anyone have any thought on why my routing is not working?

Thanks in advance,
                                Sergei
                                

------------------------------

From: "Eric Wirt" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.security
Subject: Please help with my sendmail setup...
Date: Sun, 25 Jul 1999 16:27:25 GMT

I have a machine that is hosting e-mail for about 25 clients who masquerade
behind it, and also for another 25 persons who dial into the net through
normal ISP's such as MSN, AOL, Eros, etc...

Right now, the sendmail dameon on my server is setup so that it relays ANY
mail that is thrown at it.   Most of my users who dial into the Internet
normally need to be able to relay mail fr/ my machine, but I do not want
just ANYONE to be able to.  I have looked at some MAN and HOW-TO pages, and
have found out how to restrict sendmail to only allow mail to be relayed
from specific domains -- but it appears that I would have to let ALL of AOL,
or MSN, etc. through in order for this work.  I think the best way for me to
prevent someone from relaying spam off my server will be to restrict
relaying to only work for mail that has one of several specific addresses in
the FROM: field of the message.  While I realize that this is not completely
secure, it will at least eliminate MOST random spam relay attacks...

Does anyone have any suggestions or ideas on how to go about doing this?
... or know where there is some documentation I could look at that might
explain it?

Thanks,

Eric Wirt




------------------------------

From: Bryan <Bryan@[EMAIL PROTECTED]>
Subject: tcpdump and RH6.0 - anyone get it to work?
Date: Sun, 25 Jul 1999 17:07:09 GMT

mine is broken.  rebuilt from sources - still broken.

has ANYONE gotton mandrake/redhat 6.0 tcpdump to work (on eth0, for example)?

thanks,

-- 
Bryan, http://www.Grateful.Net - Linux/Web-based Network Management
->->-> to email me, you must hunt the WUMPUS and kill it.

------------------------------


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