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Routing, network cards, OSI, etc. Anything is fair game. |
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03-01-2014, 08:29 PM
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#1
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LQ Newbie
Registered: Mar 2014
Posts: 2
Rep: 
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Ubuntu 12.04 LTS as router, two subnets and no communucation between them
I need help with a networking problem I am having. I cannot get 1 subnet to ping another. Below is a link to an image of my current setup.
http://s30.postimg.org/bk81q5lrl/network_2.jpg
I basically have a wifi router with address 192.168.1.1 connected to the internet and acting as a dhcp server to wireless clients on a 192.168.1.0 subnet. I also have a ubuntu router with two nic's. 1 connected directly to that wifi router via eth0 and the other to wired clients on 192.168.2.0 subnet connected via eth1 interface. The ubuntu box is a dhcp server too.
wifi router=192.168.1.1
eth0=192.168.1.2
eth1=192.168.2.1
192.168.2.0 clients using 192.168.1.2 as gateway.
192.168.1.0 clients using 192.168.1.1 as gateway.
static route on wifi router: network 192.168.2.0, mask 255.255.255.0, via gateway 192.168.1.2.
Code:
eth0 Link encap:Ethernet HWaddr 00:4f:4e:12:f8:3e
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::24f:4eff:fe12:f83e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15262823 errors:0 dropped:0 overruns:0 frame:0
TX packets:12507069 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:16503041209 (16.5 GB) TX bytes:2332772677 (2.3 GB)
eth1 Link encap:Ethernet HWaddr 00:22:19:2b:80:2c
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::222:19ff:fe2b:802c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:38687258 errors:0 dropped:0 overruns:0 frame:0
TX packets:65245683 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4010971875 (4.0 GB) TX bytes:93379785762 (93.3 GB)
Interrupt:21 Memory:fe6e0000-fe700000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:764055 errors:0 dropped:0 overruns:0 frame:0
TX packets:764055 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:255771719 (255.7 MB) TX bytes:255771719 (255.7 MB)
root@IT-Server:~# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
192.168.2.0 0.0.0.0 255.255.255.0 U 1 0 0 eth1
root@IT-Server:~# 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
root@IT-Server:~# cat /etc/sysctl.conf
net.ipv4.ip_forward=1
I can ping 192.168.1.2 and 192.168.2.1 from the 1.0 network. I can also do the same on the 2.0 network. But I cannot ping the other subnets hosts on either network. What am I missing here? I tried doing some stuff with iptables and masquerading already and IP forwarding is also already turned on too.
Last edited by Chris9760; 03-01-2014 at 08:33 PM.
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03-04-2014, 08:05 AM
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#2
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LQ Newbie
Registered: Feb 2014
Posts: 12
Rep:
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while pinging from a host from 1 network to host from 2 network, tcpdump this traffic for both interfaces on ubuntu server and if you see echo request do you see the corresponding echo reply or no
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03-04-2014, 08:56 AM
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#3
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Member
Registered: May 2011
Location: Nottingham, UK
Distribution: Debian
Posts: 178
Rep: 
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Is your dhcp server assigning the default gateway correctly? Check it on the clients.
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03-04-2014, 11:40 AM
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#4
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LQ Newbie
Registered: Mar 2014
Posts: 2
Original Poster
Rep:
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Alright, here is the tcpdump for both interfaces while pinging from host mrc6530b-pc on the 1.0 network to host 192.168.2.157 on the 2.0 network. I notice that there are dropped packets by the kernel, many of them actually.
Code:
root@IT-Server:~# tcpdump -i eth0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:25:43.266582 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59767: Flags [S.], seq 1535471833, ack 2708243376, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 9], length 0
10:25:43.266756 IP 192.168.2.157.59767 > ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http: Flags [.], ack 1, win 16425, length 0
10:25:43.267191 IP IT-Server.32686 > www.asusnetwork.net.domain: 64635+ PTR? 157.2.168.192.in-addr.arpa. (44)
10:25:43.267582 IP 192.168.2.157.59767 > ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http: Flags [P.], seq 1:330, ack 1, win 16425, length 329
10:25:43.303612 IP www.asusnetwork.net.domain > IT-Server.32686: 64635 NXDomain 0/0/0 (44)
10:25:43.326758 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59767: Flags [.], ack 330, win 14, length 0
10:25:43.327836 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59767: Flags [P.], seq 1:799, ack 330, win 14, length 798
10:25:43.328237 IP 192.168.2.157.59767 > ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http: Flags [F.], seq 330, ack 799, win 16225, length 0
10:25:43.328843 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59767: Flags [F.], seq 799, ack 330, win 14, length 0
10:25:43.328957 IP 192.168.2.157.59767 > ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http: Flags [.], ack 800, win 16225, length 0
10:25:43.380460 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:25:43.380466 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:25:43.382620 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59767: Flags [.], ack 331, win 14, length 0
10:25:43.385632 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:25:43.385770 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:25:43.404156 IP6 fe80::24f:4eff:fe12:f83e.mdns > ff02::fb.mdns: 0 PTR (QM)? 157.2.168.192.in-addr.arpa. (44)
10:25:43.404189 IP IT-Server.mdns > 224.0.0.251.mdns: 0 PTR (QM)? 157.2.168.192.in-addr.arpa. (44)
10:25:43.435705 IP Arthurs-iPhone.64180 > 239.255.255.250.1900: UDP, length 124
10:25:43.486583 ARP, Request who-has www.asusnetwork.net tell IT-Server, length 28
10:25:43.486696 ARP, Reply www.asusnetwork.net is-at 10:bf:48:d3:b9:20 (oui Unknown), length 46
10:25:43.490676 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 39
10:25:43.490829 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 46
10:25:43.493166 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
10:25:43.746521 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:25:43.746663 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:25:43.996557 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:25:43.996614 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:25:44.005672 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 39
10:25:44.005986 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 46
10:25:44.008397 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
10:25:44.185724 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 41
10:25:48.355913 IP IT-Server.16577 > www.asusnetwork.net.domain: 11171+ PTR? 1.1.168.192.in-addr.arpa. (42)
10:25:48.356947 IP www.asusnetwork.net.domain > IT-Server.16577: 11171* 1/0/0 PTR www.asusnetwork.net. (75)
10:25:48.358533 IP IT-Server.30646 > www.asusnetwork.net.domain: 57013+ PTR? 79.1.168.192.in-addr.arpa. (43)
10:25:48.359550 IP www.asusnetwork.net.domain > IT-Server.30646: 57013* 1/0/0 PTR MRC6530B-PC. (68)
10:25:48.359741 IP IT-Server.33658 > www.asusnetwork.net.domain: 53774+ PTR? b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa. (90)
10:25:48.360800 IP www.asusnetwork.net.domain > IT-Server.33658: 53774 NXDomain 0/0/0 (90)
10:25:48.360947 IP IT-Server.57083 > www.asusnetwork.net.domain: 23225+ PTR? e.3.8.f.2.1.e.f.f.f.e.4.f.4.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. (90)
10:25:48.361999 IP www.asusnetwork.net.domain > IT-Server.57083: 23225 NXDomain 0/0/0 (90)
10:25:48.362148 IP IT-Server.43228 > www.asusnetwork.net.domain: 26188+ PTR? 251.0.0.224.in-addr.arpa. (42)
10:25:48.363138 IP www.asusnetwork.net.domain > IT-Server.43228: 26188 NXDomain 0/0/0 (42)
10:25:48.388021 STP 802.1d, Config, Flags [none], bridge-id 8000.10:bf:48:d3:b9:20.8001, length 43
10:25:48.390885 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 41
10:25:48.392176 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 42
10:25:48.423908 IP TarrynKgsiPhone.mdns > 224.0.0.251.mdns: 0 [3q] [3n] ANY (QM)? 84:38:35:af:1d:5c@fe80::8638:35ff:feaf:1d5c._apple-mobdev2._tcp.local. ANY (QM)? Tarryn-Kriegs-iPhone.local. ANY (QM)? Tarryn-Kriegs-iPhone.local. (184)
10:25:48.424337 IP6 fe80::106a:9afc:33a4:dd02.mdns > ff02::fb.mdns: 0 [3q] [3n] ANY (QM)? 84:38:35:af:1d:5c@fe80::8638:35ff:feaf:1d5c._apple-mobdev2._tcp.local. ANY (QM)? Tarryn-Kriegs-iPhone.local. ANY (QM)? Tarryn-Kriegs-iPhone.local. (184)
10:25:48.430242 IP Arthurs-iPhone.64180 > 239.255.255.250.1900: UDP, length 124
10:25:53.364483 IP IT-Server.25908 > www.asusnetwork.net.domain: 64029+ PTR? 250.255.255.239.in-addr.arpa. (46)
10:25:58.369560 IP IT-Server.22947 > www.asusnetwork.net.domain: 28733+ PTR? 73.1.168.192.in-addr.arpa. (43)
10:25:58.370571 IP www.asusnetwork.net.domain > IT-Server.22947: 28733* 1/0/0 PTR TarrynKgsiPhone. (72)
10:25:58.370756 IP IT-Server.58266 > www.asusnetwork.net.domain: 64871+ PTR? 2.0.d.d.4.a.3.3.c.f.a.9.a.6.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. (90)
10:25:58.388668 STP 802.1d, Config, Flags [none], bridge-id 8000.10:bf:48:d3:b9:20.8001, length 43
10:25:58.404677 IP6 fe80::bdfc:2b6a:5c39:2e90.dhcpv6-client > ff02::1:2.dhcpv6-server: dhcp6 solicit
10:25:58.435789 IP Arthurs-iPhone.64180 > 239.255.255.250.1900: UDP, length 124
10:25:58.441189 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:25:58.441244 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:25:58.444130 IP www.asusnetwork.net.domain > IT-Server.58266: 64871 NXDomain 0/1/0 (160)
10:25:58.444386 IP IT-Server.41488 > www.asusnetwork.net.domain: 6933+ PTR? 2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa. (90)
10:25:58.483853 IP www.asusnetwork.net.domain > IT-Server.41488: 6933 NXDomain 0/1/0 (160)
10:25:58.484027 IP IT-Server.16382 > www.asusnetwork.net.domain: 47030+ PTR? 0.9.e.2.9.3.c.5.a.6.b.2.c.f.d.b.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. (90)
10:25:58.523101 IP6 fe80::dda2:8b86:cc4a:ac9a.59857 > ff02::c.1900: UDP, length 146
10:25:58.626020 IP www.asusnetwork.net.domain > IT-Server.16382: 47030 NXDomain 0/1/0 (160)
10:25:58.626243 IP IT-Server.5787 > www.asusnetwork.net.domain: 38277+ PTR? c.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa. (90)
10:25:58.627339 IP www.asusnetwork.net.domain > IT-Server.5787: 38277 NXDomain 0/0/0 (90)
10:25:58.627493 IP IT-Server.40555 > www.asusnetwork.net.domain: 60274+ PTR? a.9.c.a.a.4.c.c.6.8.b.8.2.a.d.d.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. (90)
^C10:25:58.648289 IP KPDell-PC.17500 > 255.255.255.255.17500: UDP, length 137
66 packets captured
571 packets received by filter
474 packets dropped by kernel
Code:
root@IT-Server:~# tcpdump -i eth1
\tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
10:27:49.845604 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59825: Flags [.], ack 1569264866, win 14, length 0
10:27:49.846418 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59825: Flags [P.], seq 0:257, ack 1, win 14, length 257
10:27:49.846689 IP 192.168.2.157.59825 > ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http: Flags [F.], seq 1, ack 257, win 16360, length 0
10:27:49.847352 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59825: Flags [F.], seq 257, ack 1, win 14, length 0
10:27:49.847397 IP 192.168.2.157.59826 > ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http: Flags [S], seq 1470624713, win 8192, options [mss 1460,nop,wscale 2,nop,nop,sackOK], length 0
10:27:49.847580 IP 192.168.2.157.59825 > ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http: Flags [.], ack 258, win 16360, length 0
10:27:49.848165 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 41
10:27:49.851993 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
10:27:49.899146 IP ec2-54-193-40-55.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59825: Flags [.], ack 2, win 14, length 0
10:27:49.904090 IP ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59826: Flags [S.], seq 1671745675, ack 1470624714, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 9], length 0
10:27:49.904238 IP 192.168.2.157.59826 > ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http: Flags [.], ack 1, win 16425, length 0
10:27:49.905040 IP 192.168.2.157.59826 > ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http: Flags [P.], seq 1:331, ack 1, win 16425, length 330
10:27:49.962476 IP ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59826: Flags [.], ack 331, win 14, length 0
10:27:49.963548 IP ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59826: Flags [P.], seq 1:807, ack 331, win 14, length 806
10:27:49.963894 IP 192.168.2.157.59826 > ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http: Flags [F.], seq 331, ack 807, win 16223, length 0
10:27:49.964529 IP ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59826: Flags [F.], seq 807, ack 331, win 14, length 0
10:27:49.964633 IP 192.168.2.157.59826 > ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http: Flags [.], ack 808, win 16223, length 0
10:27:49.980864 IP6 fe80::222:19ff:fe2b:802c.mdns > ff02::fb.mdns: 0 PTR (QM)? 157.2.168.192.in-addr.arpa. (44)
10:27:49.980902 IP IT-Server.local.mdns > 224.0.0.251.mdns: 0 PTR (QM)? 157.2.168.192.in-addr.arpa. (44)
10:27:50.017888 IP ec2-54-193-40-248.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59826: Flags [.], ack 332, win 14, length 0
10:27:50.103220 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:27:50.109424 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:27:50.238176 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 39
10:27:50.238405 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 46
10:27:50.238502 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:27:50.238509 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:27:50.243540 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
10:27:50.748185 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:27:50.748391 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:27:50.748399 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:27:50.748443 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:27:54.889214 IP ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59687: Flags [.], ack 2502847004, win 126, length 0
10:27:54.908402 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 38
10:27:54.948404 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 41
10:27:54.952597 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
10:27:54.969532 IP ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http > 192.168.2.157.57954: Flags [P.], seq 2726437765:2726438789, ack 1733358157, win 14, length 1024
10:27:54.970305 IP 192.168.2.157.59687 > ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http: Flags [P.], seq 1:1025, ack 0, win 16425, length 1024
10:27:54.971468 IP 192.168.2.157.59687 > ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http: Flags [P.], seq 1025:2485, ack 0, win 16425, length 1460
10:27:54.971477 IP 192.168.2.157.59687 > ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http: Flags [P.], seq 2485:3073, ack 0, win 16425, length 588
10:27:54.979613 IP ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http > 192.168.2.157.57954: Flags [P.], seq 1024:2048, ack 1, win 14, length 1024
10:27:54.979764 IP 192.168.2.157.57954 > ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http: Flags [.], ack 2048, win 16425, length 0
10:27:55.025441 IP ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59687: Flags [.], ack 1025, win 126, length 0
10:27:55.028062 IP6 fe80::222:19ff:fe2b:802c.mdns > ff02::fb.mdns: 0 PTR (QM)? 251.0.0.224.in-addr.arpa. (42)
10:27:55.028096 IP IT-Server.local.mdns > 224.0.0.251.mdns: 0 PTR (QM)? 251.0.0.224.in-addr.arpa. (42)
10:27:55.029146 IP ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59687: Flags [.], ack 2485, win 126, length 0
10:27:55.029209 IP ec2-54-193-44-200.us-west-1.compute.amazonaws.com.http > 192.168.2.157.59687: Flags [.], ack 3073, win 126, length 0
10:27:55.048381 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 43
10:27:55.048512 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 46
10:27:55.052760 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
10:28:00.088609 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 41
10:28:00.093163 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
10:28:00.338054 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:28:00.338122 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 24
10:28:00.343608 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:28:00.349557 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 24
10:28:00.353616 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 39
10:28:00.353866 IP MRC6530B-PC.60906 > 192.168.2.157.62339: UDP, length 45
10:28:00.359933 IP 192.168.2.157.62339 > MRC6530B-PC.60906: UDP, length 41
^C10:28:00.430270 IP 192.168.2.201.netbios-ns > 192.168.2.255.netbios-ns: NBT UDP PACKET(137): QUERY; REQUEST; BROADCAST
59 packets captured
508 packets received by filter
419 packets dropped by kernel
---------- Post added 03-04-14 at 10:41 AM ----------
The clients do have the correct gateway by the way. I double checked. |
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03-05-2014, 08:39 AM
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#5
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LQ Newbie
Registered: Feb 2014
Posts: 12
Rep:
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do you have any firewall rules in ubuntu, try to clear them all leave the default of accept, no need for nating rules the two subnets are deirctly attached to the server
what is the value of net.ipv4.conf.all.rp_filter if it is 1 try to make it 2 and test
do you have any firewall rules in the client you are trying to ping from, maybe there is some restrict in the client for ping
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