Re: Sito inaccessibile
Ciao prova ad aggiungere in /etc/sysctl.conf queste linee
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_ecn= 0
2010/1/19 Giuseppe Cicalini <cicone@gmail.com>:
> Ezio Da Rin ha scritto:
>> sulla stessa macchina con lenny (quindi stesso router e stesso provider):
>>
>> - con konqueror: no
>> - con iceweasel: no
>> - con ie da xp su virtualbox: si
>> - altra macchina in rete con ie su win98: si
>>
>
> Prova simile, con squeeze.
>
> - Iceweasel, Epiphany: no
> - Firefox, IE8, Safari, Chrome (vbox xp): sì
>
> ho catturato il traffico con wireshark durante le richieste, sembra che
> l'errore sia dovuto ad una serie di pacchetti tcp che non riesce ad
> interpretare. purtroppo non so come andare oltre.
>
> Giuseppe
>
> Virtualbox -> XP -> Firefox
>
> No. Time Source Destination Protocol Info
> 545 29.857981 192.168.9.22 77.238.3.50 HTTP GET /campus/ HTTP/1.1
> 546 29.857999 192.168.9.22 77.238.3.50 HTTP [TCP Out-Of-Order] GET /campus/ HTTP/1.1
> 547 29.938597 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 548 29.951684 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 549 29.956217 192.168.9.22 77.238.3.50 TCP adobeserver-2 > http [ACK] Seq=581 Ack=2905 Win=64240 Len=0
> 550 29.956235 192.168.9.22 77.238.3.50 TCP [TCP Dup ACK 549#1] adobeserver-2 > http [ACK] Seq=581 Ack=2905 Win=64240 Len=0
> 551 30.023563 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 552 30.033710 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 553 30.038728 192.168.9.22 77.238.3.50 TCP adobeserver-2 > http [ACK] Seq=581 Ack=5809 Win=64240 Len=0
> 554 30.038753 192.168.9.22 77.238.3.50 TCP [TCP Dup ACK 553#1] adobeserver-2 > http [ACK] Seq=581 Ack=5809 Win=64240 Len=0
> 555 30.046509 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 556 30.105656 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 557 30.106762 192.168.9.22 77.238.3.50 TCP adobeserver-2 > http [ACK] Seq=581 Ack=8713 Win=64240 Len=0
> 558 30.106789 192.168.9.22 77.238.3.50 TCP [TCP Dup ACK 557#1] adobeserver-2 > http [ACK] Seq=581 Ack=8713 Win=64240 Len=0
> 559 30.118669 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 560 30.128583 77.238.3.50 192.168.9.22 TCP [TCP segment of a reassembled PDU]
> 561 30.129607 192.168.9.22 77.238.3.50 TCP adobeserver-2 > http [ACK] Seq=581 Ack=11617 Win=64240 Len=0
> 562 30.129623 192.168.9.22 77.238.3.50 TCP [TCP Dup ACK 561#1] adobeserver-2 > http [ACK] Seq=581 Ack=11617 Win=64240 Len=0
> 563 30.161024 77.238.3.50 192.168.9.22 HTTP HTTP/1.1 200 OK (text/html)
>
> Squeeze (2.6.30-2-amd64)-> Iceweasel
>
> No. Time Source Destination Protocol Info
> 939 89.056139 192.168.9.20 77.238.3.50 HTTP GET /campus/ HTTP/1.1
> 940 89.124651 77.238.3.50 192.168.9.20 HTTP [TCP Previous segment lost] Continuation or non-HTTP traffic
> 941 89.124693 192.168.9.20 77.238.3.50 TCP [TCP Dup ACK 939#1] 50702 > http [ACK] Seq=430 Ack=1 Win=5888 Len=0 TSV=1021627 TSER=0 SLE=2897 SRE=2905
> 942 89.353824 77.238.3.50 192.168.9.20 HTTP [TCP Retransmission] Continuation or non-HTTP traffic
> 943 89.353863 192.168.9.20 77.238.3.50 TCP [TCP Dup ACK 939#2] 50702 > http [ACK] Seq=430 Ack=1 Win=5888 Len=0 TSV=1021684 TSER=0 SLE=2897 SRE=2905 SLE=2897 SRE=2905
> 944 89.812612 77.238.3.50 192.168.9.20 HTTP [TCP Retransmission] Continuation or non-HTTP traffic
> 945 89.812650 192.168.9.20 77.238.3.50 TCP [TCP Dup ACK 939#3] 50702 > http [ACK] Seq=430 Ack=1 Win=5888 Len=0 TSV=1021799 TSER=0 SLE=2897 SRE=2905 SLE=2897 SRE=2905
> 950 103.613262 77.238.3.50 192.168.9.20 TCP http > 50702 [RST] Seq=1449 Win=65535 Len=0 TSV=284400836 TSER=1021799
>
>
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