[rhn-users] Urgent-PLease help

[Stephen Kirkpatrick]

Based on the 1500 byte frame size, I assume you are running this 
experiment over an ethernet.  An ethernet frame can contain up to 1500 
bytes of data, so setting the MTU larger than 1500 should not have any 
affect on the frame size - as you have noted.

SK

Rama Chandrasekaran wrote:

>Dear Sir
>We are running some file transfer experiments using
>FTP/TCP/IP/PPP between two Linux PCs (running Red-Hat
>Linux 7.3 with kernel 2.4.18-3).  We are trying to
>change the PPP MTU size (using "ifconfig ppp0 mtu
>xxx"). The situation is described below: 
>
>(1) When we change the MTU to a size which is smaller
>than the default size 1500 bytes, it works using the
>new size, which can be observed from SYN, SYN-ACK
>exchange and TSG plots.
>
>(2) When we change the MTU to a size larger than the
>default 1500 bytes  (such as 4352 bytes), the protocol
>still sends data using the default size of 1500
>instead of the updated larger size.
>
>I think the problem is that segments/packets delivered
>to PPP are limited to less than or equal to 1500
>bytes. So even though we enlarged PPP MTU, the PDU
>delivered to PPP by TCP/IP is not larger than 1500
>bytes. 
>
>Could anyone advise us how we can adjust the size of
>TCP/IP segments larger than the default size of 1500
>bytes so that the transmitted PPP frame size is
>larger?
>
>Any help will be greatly appreciated.
>
>
>
>
>
>
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>Today's Topics:
>
>1. Fwd: Re: [rhn-users] email AYUDA AYUDAAAAA (Milon G. Logan)
>2. rpc.stadt gethostbyname error (rick)
>3. Re: rpc.stadt gethostbyname error (jludwig)
>4. Re: rpc.stadt gethostbyname error (jludwig)
>5. Re: rpc.stadt gethostbyname error (jludwig)
>6. Re: rpc.stadt gethostbyname error (jludwig)
>7. Help (Alejandro Lemus)
>8. Richard Thomas/Retaillogic/NISABA is out of the office.
>['Virus checked"] (richard.thomas at retail-logic.com)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Tue, 13 Apr 2004 09:55:24 -0700
>From: "Milon G. Logan" 
>
>Subject: Fwd: Re: [rhn-users] email AYUDA AYUDAAAAA
>To: rhn-users at redhat.com
>Message-ID:
><6.0.3.0.0.20040413095255.01b99e90 at pop.sbcglobal.yahoo.com>
>Content-Type: text/plain; charset="iso-8859-1"; format=flowed
>
>
>  
>
>>X-Apparently-To: provri at sbcglobal.net via web80313.mail.yahoo.com; Tue, 13 
>>Apr 2004 07:02:19 -0700
>>X-Originating-IP: [209.132.177.30]
>>Date: Tue, 13 Apr 2004 08:02:15 -0600
>>From: Robert Potts 
>>User-Agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv:1.0.1) Gecko/20020830
>>X-Accept-Language: en-us, en
>>To: Red Hat Network Users List 
>>Subject: Re: [rhn-users] email AYUDA AYUDAAAAA
>>X-Spam-Level:
>>X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on mail6.nmia.com
>>X-Spam-Status: No, hits=0.1 required=200.0 tests=EXCUSE_16 autolearn=no
>>version=2.63
>>X-RedHat-Spam-Score: 2.817 **
>>X-loop: rhn-users at redhat.com
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>>Reply-To: Red Hat Network Users List 
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>>
>>creo que podria encontrar toda la informacion aqui:
>>http://www.netfilter.org/documentation/HOWTO/es/networking-concepts-HOWTO.html
>>y aqui:
>>http://www.netfilter.org/documentation/HOWTO/es/packet-filtering-HOWTO.html
>>los dos en espanol
>>buen suerte
>>-Robert
>>
>>Brian T. Brunner wrote:
>>
>>    
>>
>>>(Tratare a traducir)/(I will try to translate)
>>>
>>>Hello, I need help
>>>
>>>My proxy is RH9 linux squid, with 2 ethernet cards,
>>>one to internet and the other to my LAN.
>>>All my users navigate but upon attempting to download or send mail with 
>>>outlook they are not permitted,
>>>
>>>What do I do in order to give them this service?
>>>
>>>(opinion del traductor: este mensaje debe enviarse por la lista de 
>>>'shrike')/(translator's opinion this should go to the shrike list not the 
>>>RHN list)
>>>shrike-list at redhat.com
>>>(es que "shrike" es el nombre do RHL9.0)
>>>
>>>Brian Brunner
>>>brian.t.brunner at gai-tronics.com
>>>(610)796-5838
>>>
>>>
>>>
>>>      
>>>
>>>>>>alejandro_lemus2003 at yahoo.com 04/12/04 10:08PM >>>
>>>>>>
>>>>>>            
>>>>>>
>>>hola, necesito ayuda
>>>Mi proxy es linux RH9.0 squid, con dos ethernet
>>>cards,una a internet y otra a mi LAN, todos mis
>>>usuarios navegan pero al querer bajar o enviar correo
>>>con outlook no les permite, que hago para darles este servicio?????
>>>
>>>_________________________________________________________
>>>Do You Yahoo!?
>>>Información de Estados Unidos y América Latina, en Yahoo! Noticias.
>>>Visítanos en http://noticias.espanol.yahoo.com
>>>
>>>_______________________________________________
>>>rhn-users mailing list
>>>rhn-users at redhat.com https://www.redhat.com/mailman/listinfo/rhn-users
>>>
>>>*******************************************************************
>>>This email and any files transmitted with it are confidential and
>>>intended solely for the use of the individual or entity to whom they
>>>are addressed. If you have received this email in error please notify
>>>the system manager.
>>>
>>>This footnote also confirms that this email message has been swept
>>>for the presence of computer viruses.
>>>
>>>www.hubbell.com - Hubbell Incorporated
>>>
>>>
>>>_______________________________________________
>>>rhn-users mailing list
>>>rhn-users at redhat.com
>>>https://www.redhat.com/mailman/listinfo/rhn-users
>>>
>>>.
>>>
>>>
>>>      
>>>
>>
>>
>>_______________________________________________
>>rhn-users mailing list
>>rhn-users at redhat.com
>>https://www.redhat.com/mailman/listinfo/rhn-users
>>    
>>
>
>Note confidentiality paragraph. Sent to me in error. -mgl 
>
>
>
>
>------------------------------
>
>Message: 2
>Date: Tue, 13 Apr 2004 12:08:46 -0700
>From: "rick" 
>Subject: [rhn-users] rpc.stadt gethostbyname error
>To: 
>Message-ID: <36a001c4218a$c11e5310$1400a8c0 at nationsloan.local>
>Content-Type: text/plain; charset="iso-8859-1"
>
>I've been seeing this kind of error several times lately. Looks like a
>buffer overflow attempt. Should I be concerned about this and turn some
>service off or add some rules to my firewall to prevent this kind of
>activity?
>
>Apr 12 23:31:51 spark rpc.statd[662]: gethostbyname error for
>^X÷ÿ¿^X÷ÿ¿^Z÷ÿ¿^Z÷ÿ¿%8x%8x%8x%8x%8x%8x%8x%8x%8x%62716x%hn%51859x%hn\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>220\220\220\220\220\220\220\220\220\220\220\220\220\220
>
>Thank You,
>
>Rick Whitworth
>Merged Media
>
>
>
>
>------------------------------
>
>Message: 3
>Date: Tue, 13 Apr 2004 16:31:40 -0400
>From: jludwig 
>Subject: Re: [rhn-users] rpc.stadt gethostbyname error
>To: Red Hat Network Users List 
>Message-ID: <1081888299.3203.144.camel at jMOD.home>
>Content-Type: text/plain; charset=UTF-8
>
>On Tue, 2004-04-13 at 15:08, rick wrote:
>  
>
>>I've been seeing this kind of error several times lately. Looks like a
>>buffer overflow attempt. Should I be concerned about this and turn some
>>service off or add some rules to my firewall to prevent this kind of
>>activity?
>>
>>Apr 12 23:31:51 spark rpc.statd[662]: gethostbyname error for
>>^X÷ÿ¿^X÷ÿ¿^Z÷ÿ¿^Z÷ÿ¿%8x%8x%8x%8x%8x%8x%8x%8x%8x%62716x%hn%51859x%hn\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\220\
>>220\220\220\220\220\220\220\220\220\220\220\220\220\220
>>
>>Thank You,
>>
>>Rick Whitworth
>>Merged Media
>>
>>
>>_______________________________________________
>>rhn-users mailing list
>>rhn-users at redhat.com
>>https://www.redhat.com/mailman/listinfo/rhn-users
>>    
>>
>
>dec hex binary 
>220 dc 0011-0010
>0011 Would be a move instruction for x86. I'm trying to locate IBM
>opcode now.
>
>  
>
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>
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>