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Old 04-02-2008, 12:47 AM
"stin wang"
 
Default help on network config

thanks for your email

my confusion is if i can ping 172.18.20.98 ,it should be ok in router, isn't it ??

and it's ok for windows, so i think it must be some problem about my configure on ubuntu.


i check iptables -L , it's just empty.
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*

and if i monitor traffic of eth0, it returns a lot of message

i can't figure which one is useful,, or just netbios can be recognized by different subnet??


wangtie@wangtie-desktop:~$ sudo tcpdump -i eth0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
08:33:18.201281 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43

08:33:18.215265 00:0b:fd:49:4e:95 (oui Unknown) > 01:00:0c:cc:cc:cc (oui Unknown) SNAP Unnumbered, ui, Flags [Command], length 46
08:33:18.215888 00:0b:fd:49:4e:95 (oui Unknown) > 01:00:0c:00:00:00 (oui Unknown) SNAP Unnumbered, ui, Flags [Command], length 76

08:33:18.867982 IP 172.18.20.78.netbios-ns > 172.18.20.95.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
08:33:18.868481 IP wangtie-desktop.local.32799 > 202.99.96.68.domain: 59248+ PTR? 95.20.18.172.in-addr.arpa. (43)

08:33:19.267932 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: P 2445910262:2445911693(1431) ack 2878018588 win 501 <nop,nop,timestamp 49233 23082721>
08:33:19.429220 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . ack 1431 win 65535 <nop,nop,timestamp 23084672 49233>

08:33:19.604840
08:33:20.201357 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:33:20.335574 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 1:525(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335589 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 525 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.335623 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 525:1049(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335628 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 1049 win 496 <nop,nop,timestamp 49500 23084681>
08:33:20.335672 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 1049:1573(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335678 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 1573 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.335722 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 1573:2097(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335726 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 2097 win 496 <nop,nop,timestamp 49500 23084681>
08:33:20.335771 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 2097:2621(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335777 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 2621 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.335829 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 2621:3145(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335832 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 3145 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.335868 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 3145:3669(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335872 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 3669 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.335919 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 3669:4193(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335922 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 4193 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.335967 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 4193:4717(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.335970 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 4717 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.336016 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 4717:5241(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.336019 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 5241 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.336065 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 5241:5765(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.336069 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 5765 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.336114 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 5765:6289(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.336117 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 6289 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.336155 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 6289:6714(425) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.336159 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 6714 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.336202 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 6714:7224(510) ack 1431 win 65535 <nop,nop,timestamp 23084681 49233>

08:33:20.336206 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 7224 win 501 <nop,nop,timestamp 49500 23084681>
08:33:20.402687 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 7224:7748(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>

08:33:20.402695 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 7748 win 501 <nop,nop,timestamp 49517 23084681>
08:33:20.402739 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 7748:8272(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>

08:33:20.402744 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 8272 win 501 <nop,nop,timestamp 49517 23084681>
08:33:20.402786 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 8272:8796(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>

08:33:20.402834 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 8796:9320(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>
08:33:20.402839 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 9320 win 501 <nop,nop,timestamp 49517 23084681>

08:33:20.402884 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 9320:9844(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>
08:33:20.402943 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 9844:10368(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>

08:33:20.402947 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 10368 win 501 <nop,nop,timestamp 49517 23084681>
08:33:20.402982 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 10368:10892(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>

08:33:20.403029 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 10892:11416(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>
08:33:20.403034 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 11416 win 501 <nop,nop,timestamp 49517 23084681>

08:33:20.403081 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 11416:11940(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>
08:33:20.403130 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 11940:12464(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>

08:33:20.403133 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 12464 win 501 <nop,nop,timestamp 49517 23084681>
08:33:20.403174 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 12464:12944(480) ack 1431 win 65535 <nop,nop,timestamp 23084681 49500>

08:33:20.403184 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 12944 win 501 <nop,nop,timestamp 49517 23084681>
08:33:20.411242 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 12944:13468(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49517>

08:33:20.411291 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 13468:13992(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49517>
08:33:20.411296 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 13992 win 501 <nop,nop,timestamp 49519 23084681>

08:33:20.411341 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 13992:14516(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49517>
08:33:20.411378 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 14516:14906(390) ack 1431 win 65535 <nop,nop,timestamp 23084681 49517>

08:33:20.411384 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 14906 win 501 <nop,nop,timestamp 49519 23084681>
08:33:20.411427 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 14906:15430(524) ack 1431 win 65535 <nop,nop,timestamp 23084681 49517>

08:33:20.411464 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 15430:15804(374) ack 1431 win 65535 <nop,nop,timestamp 23084681 49517>
08:33:20.411468 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 15804 win 501 <nop,nop,timestamp 49519 23084681>

08:33:20.475179 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 15804:16328(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49519>
08:33:20.475228 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 16328:16852(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49519>

08:33:20.475233 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 16852 win 501 <nop,nop,timestamp 49535 23084682>
08:33:20.475276 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 16852:17376(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49519>

08:33:20.475327 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 17376:17900(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49519>
08:33:20.475331 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 17900 win 501 <nop,nop,timestamp 49535 23084682>

08:33:20.475378 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 17900:18424(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49519>
08:33:20.475401 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 18424:18664(240) ack 1431 win 65535 <nop,nop,timestamp 23084682 49519>

08:33:20.475406 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 18664 win 501 <nop,nop,timestamp 49535 23084682>
08:33:20.505805 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 18664:19188(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>

08:33:20.505855 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 19188:19712(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>
08:33:20.505859 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 19712 win 501 <nop,nop,timestamp 49543 23084682>

08:33:20.505906 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 19712:20236(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>
08:33:20.505953 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 20236:20760(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>

08:33:20.505958 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 20760 win 501 <nop,nop,timestamp 49543 23084682>
08:33:20.506003 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 20760:21284(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>

08:33:20.506052 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 21284:21808(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>
08:33:20.506056 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 21808 win 501 <nop,nop,timestamp 49543 23084682>

08:33:20.506102 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 21808:22332(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>
08:33:20.506157 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . 22332:22856(524) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>

08:33:20.506161 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 22856 win 501 <nop,nop,timestamp 49543 23084682>
08:33:20.506164 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 22856:22892(36) ack 1431 win 65535 <nop,nop,timestamp 23084682 49535>

08:33:20.506173 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 22892 win 501 <nop,nop,timestamp 49543 23084682>
08:33:21.549235 IP wangtie-desktop.local.32800 > 202.99.96.68.domain: 34485+ A? archive.ubuntu.com.202.99.96.68. (49)

08:33:21.549264 IP wangtie-desktop.local.32801 > 202.99.96.68.domain: 20307+ A? ubuntu.csie.ntu.edu.tw.202.99.96.68. (53)
08:33:21.689781 IP lenovo-67afaeb9.local > 224.0.0.22: igmp v3 report, 1 group record(s)

08:33:22.201604 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:33:22.365444 IP lenovo-67afaeb9.local > 224.0.0.22: igmp v3 report, 1 group record(s)

08:33:22.583598 IP wangtie-desktop.local.45716 > 172.18.17.12.webcache: . 2054013221:2054014669(1448) ack 4102252924 win 501 <nop,nop,timestamp 50062 23082907>
08:33:22.583602 IP wangtie-desktop.local.45716 > 172.18.17.12.webcache: P 1448:1506(58) ack 1 win 501 <nop,nop,timestamp 50062 23082907>

08:33:22.584394 IP 172.18.17.12.webcache > wangtie-desktop.local.45716: . ack 1506 win 65535 <nop,nop,timestamp 23084702 50062>
08:33:22.584404 IP wangtie-desktop.local.45716 > 172.18.17.12.webcache: P 1506:1557(51) ack 1 win 501 <nop,nop,timestamp 50062 23084702>

08:33:22.710441 IP 172.18.17.12.webcache > wangtie-desktop.local.45716: . ack 1557 win 65484 <nop,nop,timestamp 23084705 50062>
08:33:22.814430 IP wangtie-desktop.local.45716 > 172.18.17.12.webcache: . ack 282 win 501 <nop,nop,timestamp 50120 23084705>

08:33:23.865215 IP wangtie-desktop.local.32802 > 202.99.104.68.domain: 59248+ PTR? 95.20.18.172.in-addr.arpa. (43)
08:34:08.873412 IP wangtie-desktop.local.32814 > 202.99.96.68.domain: 34587+ PTR? 68.96.99.202.in-addr.arpa. (43)

08:34:53.985620 IP wangtie-desktop.local.32826 > 202.99.96.68.domain: 53031+ PTR? 12.17.18.172.in-addr.arpa. (43)
08:34:54.210934 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43

08:34:54.989187 arp who-has 172.18.20.94 tell wangtie-desktop.local
08:34:54.989440 arp reply 172.18.20.94 is-at 00:0b:bf:a6:8f:fc (oui Unknown)
08:34:56.216049 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43

08:34:56.549203 IP wangtie-desktop.local.32824 > 202.99.104.68.domain: 34332+ A? archive.ubuntu.com.202.99.96.68. (49)
08:35:18.990216 IP wangtie-desktop.local.32832 > 202.99.96.68.domain: 63478+ PTR? 22.0.0.224.in-addr.arpa. (41)

08:35:19.267857 IP wangtie-desktop.local.45715 > 172.18.17.12.webcache: P 2646883985:2646885415(1430) ack 2333351849 win 501 <nop,nop,timestamp 79233 23084106>
08:35:19.413593 IP 172.18.17.12.webcache > wangtie-desktop.local.45715: . ack 1430 win 65535 <nop,nop,timestamp 23085872 79233>

08:35:19.620742
08:35:20.207234 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:35:20.219751 IP 172.18.17.12.webcache > wangtie-desktop.local.45715: . 1:525(524) ack 1430 win 65535 <nop,nop,timestamp 23085879 79233>

08:35:20.219766 IP wangtie-desktop.local.45715 > 172.18.17.12.webcache: . ack 525 win 501 <nop,nop,timestamp 79471 23085879>
08:35:20.219768 IP 172.18.17.12.webcache > wangtie-desktop.local.45715: P 525:605(80) ack 1430 win 65535 <nop,nop,timestamp 23085879 79233>

08:35:20.219772 IP wangtie-desktop.local.45715 > 172.18.17.12.webcache: . ack 605 win 500 <nop,nop,timestamp 79471 23085879>
08:35:21.549261 IP wangtie-desktop.local.32833 > 202.99.96.68.domain: 46597+ A? archive.ubuntu.com.202.99.96.68. (49)

08:35:21.549290 IP wangtie-desktop.local.32834 > 202.99.96.68.domain: 42762+ A? ubuntu.csie.ntu.edu.tw.202.99.96.68. (53)
08:35:22.207380 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43

08:35:22.589282 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . 1431:2879(1448) ack 22892 win 501 <nop,nop,timestamp 80064 23084682>
08:35:22.589287 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: P 2879:2936(57) ack 22892 win 501 <nop,nop,timestamp 80064 23084682>

08:35:22.589958 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . ack 2936 win 65535 <nop,nop,timestamp 23085903 80064>
08:35:22.589970 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: P 2936:2986(50) ack 22892 win 501 <nop,nop,timestamp 80064 23085903>

08:35:22.802649 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: . ack 2986 win 65485 <nop,nop,timestamp 23085906 80064>
08:35:22.933508 IP 172.18.17.12.webcache > wangtie-desktop.local.45714: P 22892:23173(281) ack 2986 win 65485 <nop,nop,timestamp 23085907 80064>

08:35:22.933520 IP wangtie-desktop.local.45714 > 172.18.17.12.webcache: . ack 23173 win 501 <nop,nop,timestamp 80150 23085907>
08:35:23.989237 IP wangtie-desktop.local.32835 > 202.99.104.68.domain: 63478+ PTR? 22.0.0.224.in-addr.arpa. (41)

08:35:24.208117 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:35:26.211844 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:35:26.549221 IP wangtie-desktop.local.32836 > 202.99.104.68.domain: 46597+ A? archive.ubuntu.com.202.99.96.68. (49)

08:35:26.549239 IP wangtie-desktop.local.32837 > 202.99.104.68.domain: 42762+ A? ubuntu.csie.ntu.edu.tw.202.99.96.68. (53)
08:35:28.090264 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50

08:35:28.152790 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50
08:35:28.215208 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:35:28.215228 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50

08:35:28.989203 IP wangtie-desktop.local.32832 > 202.99.96.68.domain: 63478+ PTR? 22.0.0.224.in-addr.arpa. (41)
08:35:29.027710 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50

08:35:29.626344 CDPv2, ttl: 180s, Device-ID 'qxt2950-01-1'[|cdp]
08:35:29.635064
08:35:29.902686 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50
08:35:30.208118 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43

08:35:30.360216 IPX 00000000.00:1a:a0:bd:4e:2d.0553 > 00000000.ff:ff:ff:ff:ff:ff.0553: ipx-nwlink-dgm 187
08:35:30.360533 IP 172.18.20.65.netbios-dgm > 172.18.20.95.netbios-dgm: NBT UDP PACKET(138)
08:35:30.793709 IP lenovo-67afaeb9.local.netbios-dgm > 172.18.20.95.netbios-dgm: NBT UDP PACKET(138)

08:35:30.793777 IP lenovo-67afaeb9.local.netbios-ns > 172.18.20.95.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
08:35:30.794336 IP 172.18.20.69.netbios-ns > 172.18.20.95.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST

08:35:30.794500 arp who-has 172.18.20.69 tell lenovo-67afaeb9.local
08:35:31.543384 IP lenovo-67afaeb9.local.netbios-ns > 172.18.20.95.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST

08:35:31.549206 IP wangtie-desktop.local.32833 > 202.99.96.68.domain: 46597+ A? archive.ubuntu.com.202.99.96.68. (49)
08:35:31.549217 IP wangtie-desktop.local.32834 > 202.99.96.68.domain: 42762+ A? ubuntu.csie.ntu.edu.tw.202.99.96.68. (53)

08:35:32.208152 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:35:32.293381 IP lenovo-67afaeb9.local.netbios-ns > 172.18.20.95.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST

08:35:32.863185 IP 172.18.20.94 > 224.0.0.13: PIMv2, Hello, length 18
08:35:33.045415 IP lenovo-67afaeb9.local.netbios-ns > 172.18.20.95.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST

08:35:33.058781 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50
08:35:33.933774 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50
08:35:33.989201 IP wangtie-desktop.local.32835 > 202.99.104.68.domain: 63478+ PTR? 22.0.0.224.in-addr.arpa. (41)

08:35:34.215477 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:35:34.808742 IPX 00000000.00:10:c6:bf:6c:b6.0455 > 00000000.ff:ff:ff:ff:ff:ff.0455: ipx-netbios 50
08:35:36.215350 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43

08:35:36.242680 IPX 00000000.00:04:00:12:a2:52.83c2 > 00000000.ff:ff:ff:ff:ff:ff.0452: ipx-sap-resp 055e '!LEX00200048454A[|ipx 64]
08:35:36.242772 (NOV-ETHII) IPX 00000000.00:04:00:12:a2:52.83c2 > 00000000.ff:ff:ff:ff:ff:ff.0452: ipx-sap-resp 055e '!LEX00200048454A[|ipx 64]

08:35:36.242846 (NOV-ETHII) IPX 00000000.00:04:00:12:a2:52.83c2 > 00000000.ff:ff:ff:ff:ff:ff.0452: ipx-sap-resp 055e '!LEX00200048454A[|ipx 64]
08:35:36.242912 IPX 00000000.00:04:00:12:a2:52.83c2 > 00000000.ff:ff:ff:ff:ff:ff.0452: ipx-sap-resp 055e '!LEX00200048454A[|ipx 64]

08:35:36.549203 IP wangtie-desktop.local.32836 > 202.99.104.68.domain: 46597+ A? archive.ubuntu.com.202.99.96.68. (49)
08:35:36.549216 IP wangtie-desktop.local.32837 > 202.99.104.68.domain: 42762+ A? ubuntu.csie.ntu.edu.tw.202.99.96.68. (53)

08:35:38.208333 STP 802.1d, Config, Flags [none], bridge-id 8001.00:0b:fd:49:4e:80.8015, length 43
08:35:39.093213 IP wangtie-desktop.local.mdns > 224.0.0.251.mdns: 0 PTR (QM)? 22.0.0.224.in-addr.arpa. (41)

167 packets captured

791 packets received by filter
344 packets dropped by kernel




2008/4/2, Mario Spinthiras <mspinthiras@gmail.com>:
Dear Tie,


*As I understand you have three machines of which each is in it's own logical segment. That means that you require a router in each segment to route packets from each subnet. Based on the networks you mentioned in your email you problem probably lays with routing between each subnet. Of course there is also the possibility of having rules locally on your machines active with iptables which can hence block traffic. You can list them by typing iptables -L and flush (empty) the rulesets by typing iptables -F.


*If you are not in charge of the routing between these segments then talk to someone who is and see what goes bad there but before that I would suggest checking the rules.
*In addition to that (as a plus) you can always run a tcpdump -i eth[X] and start flowing traffic (tsclient , ftp , etc) and see if the other end does indeed get the packets but simply can't route back to the originating machine. This is a ncie way of doing some access-list reconnaissance.


*In conclusion your problem could possibly be the access given to route between each of your three subnets.

Warm Regards,
Mario A. Spinthiras
Nicosia , Cyprus
Blog: http://www.spinthiras.net


Mail: mspinthiras@gmail.com
Skype: smario125



On Tue, Apr 1, 2008 at 5:46 AM, stin wang <stin.wang@gmail.com> wrote:


I try to convert my work from windows to linux.


first install Ubuntu is so easy , thanks god.


now i can use Firefox, msn, and so on ,with proxy setting correctly

but my question is

my computer is used in subnet, configuration as follow


pc1

ip 172.18.20.87

mask 255.255.255.224

gate 172.18.20.94



the problem is described as follow:
there are other two pcs


pc2

172.18.20.98

255.255.255.224

172.18.20.126

pc3

172.18.20.225

255.255.255.224

172.18.20.253


i can ping 172.18.20.98 172.18.20.225 in pc1 ,it's ok


but i can't use ftp,vnc,or tsclient to pc2 or pc3, but it's ok for 172.18.20.88 which is in the same gateway as pc1,



what's wrong with it? how to figure out.



or just ubuntu have some problem with subnet??

i use ubuntu 7.10
--
----------------------------------------------
Tie Wang
TianJin Climate Center
TianJin Meteorological Bureau
Tianjin, China, 300074



Email: stin.wang@gmail.com
Tel:+86-22-23333559
----------------------------------------------

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--
----------------------------------------------
Tie Wang
TianJin Climate Center
TianJin Meteorological Bureau
Tianjin, China, 300074
Email: stin.wang@gmail.com

Tel:+86-22-23333559
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