TCPクライアントポートがループバックインターフェイス経由でサーバーに接続されている場合のランダムリセットを調査する方法
ローカルホスト上のサーバーを初期化し、同じマシン上のこのローカルサーバーに接続しているクライアントの開始と停止を含む何千ものストレステストを実行するテストスイートがあります。クライアントからサーバーにRSTが送信された理由を見つけようとしています。
これは一連のイベントです。
- クライアントがSYNを初期化します
- サーバーはSYN、ACKを送り返します
- クライアントがRSTを送信する（ACKおよび接続の確立の代わりに）
多くの場合、サーバーは99％のCPUを実行していますが、数秒/分で通常に戻ります。
最初は、クライアントがTIME_WAIT状態にある以前に閉じた接続のポートを使用しているため、サーバーがその接続でSYN、ACKを送信すると、クライアントがRSTを発行するため、これが原因であると考えました。なぜクライアントがTIME_WAIT状態のポートを使用する必要があるのか懐疑的でしたが、古いFedoraコア4を使用していて、TCP/IPが適切に実装されていないのではないかと思いました:-)。
上記の問題を修正するために行われたすべての調整が問題の軽減に役立たなかったため、これが理由だとは思いません。参考までに、私が試した変更は/etc/sysctl.conf：
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_fin_timeout = 15
net.ipv4.tcp_rfc1337 = 1
net.ipv4.tcp_tw_reuse = 1
もう1つ、この問題は一貫していません。実際、この問題を再現できるのは、サーバーを再起動してすべてのクライアントテストを15〜35サイクル実行した後でのみです。
私はこれがなぜ起こり得るのかについて考えることができるすべての理由を使い果たしたので、誰かが何が起こっているのかについて何か考えがあれば私に知らせてください。
パケット詳細
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:45.378209 1032719 1858.494749 ::1 ::1 TCP 94 netview-aix-5 navisphere netview-aix-5 > navisphere [SYN] Seq=0 Win=32752 Len=0 MSS=16376 SACK_PERM=1 TSval=1587252 TSecr=0 WS=128
Frame 1032719: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:45.378209000 EDT
Epoch Time: 1403722185.378209000 seconds
[Time delta from previous captured frame: 0.005893000 seconds]
[Time delta from previous displayed frame: 0.000000000 seconds]
[Time since reference or first frame: 1858.494749000 seconds]
Frame Number: 1032719
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 0, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Header length: 40 bytes
Flags: 0x02 (SYN)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish request (SYN): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32752
[Calculated window size: 32752]
Checksum: 0xf489 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1587252, TSecr 0
No-Operation (NOP)
Window scale: 7 (multiply by 128)
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:45.378222 1032720 1858.494762 ::1 ::1 TCP 94 navisphere netview-aix-5 navisphere > netview-aix-5 [SYN, ACK] Seq=0 Ack=1 Win=32728 Len=0 MSS=16376 SACK_PERM=1 TSval=1587252 TSecr=1587252 WS=128
Frame 1032720: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:45.378222000 EDT
Epoch Time: 1403722185.378222000 seconds
[Time delta from previous captured frame: 0.000013000 seconds]
[Time delta from previous displayed frame: 0.000013000 seconds]
[Time since reference or first frame: 1858.494762000 seconds]
Frame Number: 1032720
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: navisphere (2162), Dst Port: netview-aix-5 (1665), Seq: 0, Ack: 1, Len: 0
Source port: navisphere (2162)
Destination port: netview-aix-5 (1665)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 40 bytes
Flags: 0x12 (SYN, ACK)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...1 .... = Acknowledgement: Set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish acknowledge (SYN+ACK): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32728
[Calculated window size: 32728]
Checksum: 0xf7fa [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1587252, TSecr 1587252
No-Operation (NOP)
Window scale: 7 (multiply by 128)
[SEQ/ACK analysis]
[This is an ACK to the segment in frame: 1032719]
[The RTT to ACK the segment was: 0.000013000 seconds]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:45.378228 1032721 1858.494768 ::1 ::1 TCP 74 netview-aix-5 navisphere netview-aix-5 > navisphere [RST] Seq=1 Win=0 Len=0
Frame 1032721: 74 bytes on wire (592 bits), 74 bytes captured (592 bits)
Arrival Time: Jun 25, 2014 14:49:45.378228000 EDT
Epoch Time: 1403722185.378228000 seconds
[Time delta from previous captured frame: 0.000006000 seconds]
[Time delta from previous displayed frame: 0.000006000 seconds]
[Time since reference or first frame: 1858.494768000 seconds]
Frame Number: 1032721
Frame Length: 74 bytes (592 bits)
Capture Length: 74 bytes (592 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP RST]
[Coloring Rule String: tcp.flags.reset eq 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 20
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 1, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 1 (relative sequence number)
Header length: 20 bytes
Flags: 0x04 (RST)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .1.. = Reset: Set
[Expert Info (Chat/Sequence): Connection reset (RST)]
.... .... ..0. = Syn: Not set
.... .... ...0 = Fin: Not set
Window size value: 0
[Calculated window size: 0]
[Window size scaling factor: 128]
Checksum: 0x4eea [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:48.375927 1032722 1861.492467 ::1 ::1 TCP 94 netview-aix-5 navisphere netview-aix-5 > navisphere [SYN] Seq=0 Win=32752 Len=0 MSS=16376 SACK_PERM=1 TSval=1588002 TSecr=0 WS=128
Frame 1032722: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:48.375927000 EDT
Epoch Time: 1403722188.375927000 seconds
[Time delta from previous captured frame: 2.997699000 seconds]
[Time delta from previous displayed frame: 2.997699000 seconds]
[Time since reference or first frame: 1861.492467000 seconds]
Frame Number: 1032722
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 0, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Header length: 40 bytes
Flags: 0x02 (SYN)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish request (SYN): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32752
[Calculated window size: 32752]
Checksum: 0xf19b [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1588002, TSecr 0
No-Operation (NOP)
Window scale: 7 (multiply by 128)
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:48.375950 1032723 1861.492490 ::1 ::1 TCP 94 navisphere netview-aix-5 [TCP Previous segment lost] navisphere > netview-aix-5 [SYN, ACK] Seq=2997725 Ack=1 Win=32728 Len=0 MSS=16376 SACK_PERM=1 TSval=1588002 TSecr=1588002 WS=128
Frame 1032723: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:48.375950000 EDT
Epoch Time: 1403722188.375950000 seconds
[Time delta from previous captured frame: 0.000023000 seconds]
[Time delta from previous displayed frame: 0.000023000 seconds]
[Time since reference or first frame: 1861.492490000 seconds]
Frame Number: 1032723
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: Bad TCP]
[Coloring Rule String: tcp.analysis.flags]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: navisphere (2162), Dst Port: netview-aix-5 (1665), Seq: 2997725, Ack: 1, Len: 0
Source port: navisphere (2162)
Destination port: netview-aix-5 (1665)
[Stream index: 3374]
Sequence number: 2997725 (relative sequence number)
Acknowledgement number: 1 (relative ack number)
Header length: 40 bytes
Flags: 0x12 (SYN, ACK)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...1 .... = Acknowledgement: Set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish acknowledge (SYN+ACK): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32728
[Calculated window size: 32728]
Checksum: 0x3414 [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1588002, TSecr 1588002
No-Operation (NOP)
Window scale: 7 (multiply by 128)
[SEQ/ACK analysis]
[This is an ACK to the segment in frame: 1032722]
[The RTT to ACK the segment was: 0.000023000 seconds]
[TCP Analysis Flags]
[A segment before this frame was lost]
[Expert Info (Warn/Sequence): Previous segment lost (common at capture start)]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:48.375958 1032724 1861.492498 ::1 ::1 TCP 74 netview-aix-5 navisphere netview-aix-5 > navisphere [RST] Seq=1 Win=0 Len=0
Frame 1032724: 74 bytes on wire (592 bits), 74 bytes captured (592 bits)
Arrival Time: Jun 25, 2014 14:49:48.375958000 EDT
Epoch Time: 1403722188.375958000 seconds
[Time delta from previous captured frame: 0.000008000 seconds]
[Time delta from previous displayed frame: 0.000008000 seconds]
[Time since reference or first frame: 1861.492498000 seconds]
Frame Number: 1032724
Frame Length: 74 bytes (592 bits)
Capture Length: 74 bytes (592 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP RST]
[Coloring Rule String: tcp.flags.reset eq 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 20
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 1, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 1 (relative sequence number)
Header length: 20 bytes
Flags: 0x04 (RST)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .1.. = Reset: Set
[Expert Info (Chat/Sequence): Connection reset (RST)]
.... .... ..0. = Syn: Not set
.... .... ...0 = Fin: Not set
Window size value: 0
[Calculated window size: 0]
[Window size scaling factor: 128]
Checksum: 0x4eea [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Date & Time No. Time Source Destination Protocol Length Source port Dest port Info
2014-06-25 14:49:54.376072 1032725 1867.492612 ::1 ::1 TCP 94 netview-aix-5 navisphere netview-aix-5 > navisphere [SYN] Seq=0 Win=32752 Len=0 MSS=16376 SACK_PERM=1 TSval=1589502 TSecr=0 WS=128
Frame 1032725: 94 bytes on wire (752 bits), 94 bytes captured (752 bits)
Arrival Time: Jun 25, 2014 14:49:54.376072000 EDT
Epoch Time: 1403722194.376072000 seconds
[Time delta from previous captured frame: 6.000114000 seconds]
[Time delta from previous displayed frame: 6.000114000 seconds]
[Time since reference or first frame: 1867.492612000 seconds]
Frame Number: 1032725
Frame Length: 94 bytes (752 bits)
Capture Length: 94 bytes (752 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ipv6:tcp]
[Coloring Rule Name: TCP SYN/FIN]
[Coloring Rule String: tcp.flags & 0x02 || tcp.flags.fin == 1]
Ethernet II, Src: 00:00:00_00:00:00 (00:00:00:00:00:00), Dst: 00:00:00_00:00:00 (00:00:00:00:00:00)
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Source: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
Type: IPv6 (0x86dd)
Internet Protocol Version 6, Src: ::1 (::1), Dst: ::1 (::1)
0110 .... = Version: 6
[0110 .... = This field makes the filter "ip.version == 6" possible: 6]
.... 0000 0000 .... .... .... .... .... = Traffic class: 0x00000000
.... 0000 00.. .... .... .... .... .... = Differentiated Services Field: Default (0x00000000)
.... .... ..0. .... .... .... .... .... = ECN-Capable Transport (ECT): Not set
.... .... ...0 .... .... .... .... .... = ECN-CE: Not set
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 40
Next header: TCP (0x06)
Hop limit: 64
Source: ::1 (::1)
Destination: ::1 (::1)
Transmission Control Protocol, Src Port: netview-aix-5 (1665), Dst Port: navisphere (2162), Seq: 0, Len: 0
Source port: netview-aix-5 (1665)
Destination port: navisphere (2162)
[Stream index: 3374]
Sequence number: 0 (relative sequence number)
Header length: 40 bytes
Flags: 0x02 (SYN)
000. .... .... = Reserved: Not set
...0 .... .... = Nonce: Not set
.... 0... .... = Congestion Window Reduced (CWR): Not set
.... .0.. .... = ECN-Echo: Not set
.... ..0. .... = Urgent: Not set
.... ...0 .... = Acknowledgement: Not set
.... .... 0... = Push: Not set
.... .... .0.. = Reset: Not set
.... .... ..1. = Syn: Set
[Expert Info (Chat/Sequence): Connection establish request (SYN): server port navisphere]
.... .... ...0 = Fin: Not set
Window size value: 32752
[Calculated window size: 32752]
Checksum: 0xebbf [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
Options: (20 bytes)
Maximum segment size: 16376 bytes
TCP SACK Permitted Option: True
Timestamps: TSval 1589502, TSecr 0
No-Operation (NOP)
Window scale: 7 (multiply by 128)
iptables-save出力：
# Generated by iptables-save v1.3.0 on Thu Jun 26 10:15:33 2014
*filter
:FORWARD ACCEPT [0:0]
:INPUT ACCEPT [675:236200]
:OUTPUT ACCEPT [241:21540]
COMMIT
# Completed on Thu Jun 26 10:15:33 2014
Fedora 4 TCPスタックの実装にあると私が推測している根本原因の修正がない場合、採用されたソリューションでこのスレッドを締めくくりたいだけです。ソリューションとして、私は単に即時の再導入を導入しました。失敗の原因がETIMEDOUTであり、使用されているプロトコルがIPV6である場合の接続試行。これにより、私と私のチームの問題は完全に修正され、他の接続問題でエラーの報告がさらに3分間遅れて、ETIMEDOUTが発生する可能性があります。これは問題の実際の/理想的な解決策ではありませんが、先に進むことができます...自動テストスイートにのみ影響し、顧客に出荷されないためです。最終的には、Fedora 4 tcp/ipスタックの実装を十分に知っている人がいることを願っています。この謎を永久に解決します。