Mailinglist Archive: opensuse-bugs (7823 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=471620


           Summary: 3-way handshake fails for some IP-adresses
    Classification: openSUSE
           Product: openSUSE 11.1
           Version: Final
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Network
        AssignedTo: bnc-team-screening@xxxxxxxxxxxxxxxxxxxxxx
        ReportedBy: frank_fischer@xxxxxxxxxxxxxx
         QAContact: qa@xxxxxxx
          Found By: ---


User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.5)
Gecko/2008121300 SUSE/3.0.5-1.1 Firefox/3.0.5

I have a really strange problem. I recently updated from OpenSuSE 11.0 to 11.1
on my Acer Travemate 8100 and now I have the following problem. If I am
connected to my router (Thomson cable router) with wifi (ipw2200) I can not
connect to certain web-servers. If I connect with my LAN-cable attached,
everything is ok. If I use a D-link wifi router everything is ok as well.

Connect to www.google.de, LAN-cable attached:
11 12.616527 192.168.3.1 74.125.77.147 TCP 34282 > http [SYN] Seq=0 Win=5840
Len=0 MSS=1460 TSV=1854499 TSER=0
12 12.649817 74.125.77.147 192.168.3.1 TCP http > 34282 [SYN, ACK] Seq=0 Ack=1
Win=5672 Len=0 MSS=1430 TSV=3181584279 TSER=1854499
13 12.649856 192.168.3.1 74.125.77.147 TCP 34282 > http [ACK] Seq=1 Ack=1
Win=5840 Len=0 TSV=1854507 TSER=3181584279
--> works

Connect to www.opensuse.org, LAN-cable attached:
49 39.328111 192.168.3.1 130.57.4.24 TCP 53982 > http [SYN] Seq=0 Win=5840
Len=0 MSS=1460 TSV=1861177 TSER=0
50 39.514730 130.57.4.24 192.168.3.1 TCP http > 53982 [SYN, ACK] Seq=0 Ack=1
Win=6144 Len=0 MSS=1380
51 39.514784 192.168.3.1 130.57.4.24 TCP 53982 > http [ACK] Seq=1 Ack=1
Win=5840 Len=0
--> works

Connect to www.google.de, wifi:
16 5.765114 192.168.3.1 74.125.77.99 TCP 51405 > http [SYN] Seq=0 Win=5840
Len=0 MSS=1460 TSV=2027783 TSER=0
17 5.794694 74.125.77.99 192.168.3.1 TCP http > 51405 [SYN, ACK] Seq=0 Ack=1
Win=5672 Len=0 MSS=1430 TSV=3680839936 TSER=2027783
18 5.794753 192.168.3.1 74.125.77.99 TCP 51405 > http [ACK] Seq=1 Ack=1
Win=5840 Len=0 TSV=2027791 TSER=3680839936
--> works

Connect to www.opensuse.org, wifi:
31 22.310785 192.168.3.1 130.57.4.24 TCP 56922 > http [SYN] Seq=0 Win=5840
Len=0 MSS=1460 TSV=2031920 TSER=0
32 22.502631 130.57.4.24 192.168.3.1 TCP http > 56922 [SYN, ACK] Seq=0 Ack=1
Win=6144 Len=0 MSS=1380
33 23.894152 130.57.4.24 192.168.3.1 TCP http > 56922 [SYN, ACK] Seq=0 Ack=1
Win=6144 Len=0 MSS=1380
34 25.310098 192.168.3.1 130.57.4.24 TCP 56922 > http [SYN] Seq=0 Win=5840
Len=0 MSS=1460 TSV=2032670 TSER=0
35 26.854485 130.57.4.24 192.168.3.1 TCP http > 56922 [SYN, ACK] Seq=0 Ack=1
Win=6144 Len=0 MSS=1380

--> does not work. Linux does not send ACK to SYN/ACK

output of netstat for this connection:
tcp        0      1 192.168.3.1:58811       130.57.4.24:80          SYN_SENT


With OpenSuSE 11.0 or in Windows XP there is no problem.

I do not have a firewall enabled:
hostname:~ # iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

There are a lot more sites I can not connect to due to the missing ACK. For
example www.freshmeat.net.

Next thing I try is to use older kernel-versions.



Reproducible: Always

Steps to Reproduce:
1.
2.
3.

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