Yerel bir ağda iki ubuntu bilgisayarım var ve hiçbiri birbirlerine ping atamıyor. Her denediğimde "hedef ana bilgisayara erişilemiyor" hata mesajını alıyorum. Her iki bilgisayar da herhangi bir sorunla internete erişebilir.
Telus'tan bir ActionTech v1000h yönlendiricim var. Müşteri temsilcilerinden biriyle görüştüm ve iki cihazın ağda birbirlerine ping atmaması için hiçbir neden olmaması gerektiğini söylediler.
Tamamen kayboldum, herhangi birinizin fikri var mı?
Bilgisayar 1:
ifconfig -a
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:10084 errors:0 dropped:0 overruns:0 frame:0
TX packets:10084 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:797420 (797.4 KB) TX bytes:797420 (797.4 KB)
wlan0 Link encap:Ethernet HWaddr c4:85:08:77:d3:f5
inet addr:192.168.1.77 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::c685:8ff:fe77:d3f5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:373068 errors:0 dropped:0 overruns:0 frame:0
TX packets:380158 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:103445020 (103.4 MB) TX bytes:112630337 (112.6 MB)
yol -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 wlan0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0
192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0
sudo 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
Bilgisayar 2:
ifconfig -a
etho0 Link encap:Ethernet HWaddr 00:24:8c:ae:f6:91
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:2
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
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:110 errors:0 dropped:0 overruns:0 frame:0
TX packets:110 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8414 (8.4 KB) TX bytes:8414 (8.4 KB)
wlan0 Link encap:Ethernet HWaddr 00:22:43:9b:7b:64
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::222:43ff:fe9b:7b64/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:252 errors:0 dropped:0 overruns:0 frame:0
TX packets:435 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:123143 (123.1 KB) TX bytes:65828 (65.8 KB)
yol -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 wlan0
192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0
sudo 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
Düzenle: Bilgisayar 1, bilgisayar 2'ye ping işlemi yapmaya çalıştığında hata örneği:
ping 192.168.1.2
PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data.
From 192.168.1.77 icmp_seq=1 Destination Host Unreachable
From 192.168.1.77 icmp_seq=2 Destination Host Unreachable
From 192.168.1.77 icmp_seq=3 Destination Host Unreachable
From 192.168.1.77 icmp_seq=4 Destination Host Unreachable
From 192.168.1.77 icmp_seq=5 Destination Host Unreachable
From 192.168.1.77 icmp_seq=6 Destination Host Unreachable
^C
--- 192.168.1.2 ping statistics ---
7 packets transmitted, 0 received, +6 errors, 100% packet loss, time 6031ms
pipe 3
Düzenle 2: arp -a
her iki bilgisayarın
Bilgisayar 1:
? (192.168.1.254) at 20:76:00:f5:3b:70 [ether] on wlan0
Bilgisayar 2:
? (192.168.1.254) at 20:76:00:f5:3b:70 [ether] on wlan0
? (192.168.1.77) at <incomplete> on wlan0
Edit 3: nmap -sn 192.168.1.0/24
Bilgisayarda 2
Starting Nmap 6.40 ( http://nmap.org ) at 2014-05-07 21:14 PDT
Nmap scan report for 192.168.1.2
Host is up (0.00024s latency).
Nmap done: 256 IP addresses (1 host up) scanned in 3.30 seconds
Edit 4: İlk ping 192.168.1.254 ve daha sonra her iki bilgisayarın tcpdump günlüklerini kaydeder:
Bilgisayar 1:
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 65535 bytes
22:45:01.661300 ARP, Request who-has 192.168.1.2 tell 192.168.1.77, length 28
22:45:02.659393 ARP, Request who-has 192.168.1.2 tell 192.168.1.77, length 28
22:45:03.659394 ARP, Request who-has 192.168.1.2 tell 192.168.1.77, length 28
22:45:04.676872 ARP, Request who-has 192.168.1.2 tell 192.168.1.77, length 28
22:45:05.675391 ARP, Request who-has 192.168.1.2 tell 192.168.1.77, length 28
22:45:06.675396 ARP, Request who-has 192.168.1.2 tell 192.168.1.77, length 28
22:45:07.692825 ARP, Request who-has 192.168.1.2 tell 192.168.1.77, length 28
22:45:48.379058 ARP, Request who-has 192.168.1.77 tell 192.168.1.254, length 28
22:45:48.379108 ARP, Reply 192.168.1.77 is-at c4:85:08:77:d3:f5, length 28
22:45:54.419388 ARP, Request who-has 192.168.1.254 tell 192.168.1.77, length 28
22:45:54.420875 ARP, Reply 192.168.1.254 is-at 20:76:00:f5:3b:70, length 28
Bilgisayar 2:
reading from file pc2.pcap, link-type EN10MB (Ethernet)
22:44:43.538367 ARP, Request who-has 192.168.1.254 tell 192.168.1.2, length 28
22:44:43.676705 ARP, Reply 192.168.1.254 is-at 20:76:00:f5:3b:70 (oui Unknown), length 28
22:45:02.107935 ARP, Request who-has 192.168.1.254 tell 192.168.1.2, length 28
22:45:02.107951 ARP, Reply 192.168.1.254 is-at 20:76:00:f5:3b:70 (oui Unknown), length 28
22:45:06.780619 ARP, Request who-has 192.168.1.77 tell 192.168.1.2, length 28
22:45:07.778419 ARP, Request who-has 192.168.1.77 tell 192.168.1.2, length 28
22:45:08.778419 ARP, Request who-has 192.168.1.77 tell 192.168.1.2, length 28
22:45:09.796214 ARP, Request who-has 192.168.1.77 tell 192.168.1.2, length 28
Düzenleme 5: Her iki bilgisayar için statik ips kurulumu etho0 ve bir internet kablosuyla bağladı. Her iki bilgisayar da kesinlikle ethernet kablosuyla birbirlerine ping atabilir! ifconfig -a
eth0 sonuçları:
Bilgisayar 1:
eth0 Link encap:Ethernet HWaddr 68:68:68:00:62:a4
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::6a68:68ff:fe00:62a4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4060 (4.0 KB) TX bytes:7629 (7.6 KB)
Bilgisayar 2:
eth0 Link encap:Ethernet HWaddr 00:24:8c:ae:f6:91
inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::224:8cff:feae:f691/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:250 errors:0 dropped:0 overruns:0 frame:0
TX packets:130 errors:0 dropped:0 overruns:0 carrier:3
collisions:0 txqueuelen:1000
RX bytes:26501 (26.5 KB) TX bytes:20897 (20.8 KB)