[5.004] Trouble with [T]-DSL-connection

Hello,
I'm using 5.004 since a few days. today I noticed that I'm not able to fetch my mails from epost.de with fetchmail, I only get a 'socket-error' from fetchmail. I cross-checked with some websites: www.otto.de, www.epost.de and www.plus.de. So it looks for me like a problem with clamping (option CLAMPMSS in rp-pppoe) set to MTU. AFAIR MSS must set to MTU-40. rp-pppoe sets MSS to 1412.

On 4.x I had similar problems, I couldn't connect to my irc-bouncer hosted by a freind of mine. After I changed DSL.sh to use a different MSS I was able to connect and never gave me trouble again.

Could you verify this or is it simple bullshit? ;-)

Parents

0 anonymous_02 over 21 years ago

Hi Eisofen,

Code:

 
   1500 Ethernet MTU
-    6 PPPoE overhead
-    2 PPP overhead
-----------------------
  1492 PPPoE MTU
-   40 IP/TCP overhead (see Stevens, TCP/IP Illustrated Vol. I p. 237)
-----------------------
  1452  MSS over PPPoE

MSS is set to MTU - 40 where MTU is the PPPoE-MTU.

Maybe you should try to lower the MTU?

Anonymous

Reply

0 anonymous_02 over 21 years ago

Hi Eisofen,

Code:

 
   1500 Ethernet MTU
-    6 PPPoE overhead
-    2 PPP overhead
-----------------------
  1492 PPPoE MTU
-   40 IP/TCP overhead (see Stevens, TCP/IP Illustrated Vol. I p. 237)
-----------------------
  1452  MSS over PPPoE

MSS is set to MTU - 40 where MTU is the PPPoE-MTU.

Maybe you should try to lower the MTU?

Anonymous

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