
我有一台使用乙太網路連接到網路的電腦。使用 Ubuntu,我可以使用 nslookup 解析域,但如果我嘗試執行“ping google.com”或“ping 74.125.39.104”,它不起作用。
我在兩台上網本上使用過 Arch Linux、Mint 和 Ubuntu Live,但都沒有成功。然而,Windows 工作得很好。讓我不再使用 Windows!
如果配置:
sudo ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:26:18:80:79:18
inet addr:10.20.6.180 Bcast:10.20.7.255 Mask:255.255.254.0
inet6 addr: fe80::226:18ff:fe80:7918/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5751 errors:0 dropped:0 overruns:0 frame:0
TX packets:2397 errors:0 dropped:0 overruns:0 carrier:17
collisions:0 txqueuelen:1000
RX bytes:659976 (659.9 KB) TX bytes:253881 (253.8 KB)
Interrupt:40
路線:
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.20.6.0 0.0.0.0 255.255.254.0 U 1 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
0.0.0.0 10.20.6.1 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 10.20.6.1 0.0.0.0 UG 202 0 0 eth0
網路統計:
netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.20.6.0 0.0.0.0 255.255.254.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 10.20.6.1 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 10.20.6.1 0.0.0.0 UG 0 0 0 eth0
iptables:
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
解決.conf:
cat /etc/resolv.conf
# Generated by resolvconf
search uni-mannheim.de
nameserver 134.155.96.51
nameserver 134.155.96.53
追蹤路徑不工作:
sudo tracepath www.google.com
1: laptop.local 0.342ms pmtu 1500
1: no reply
2: no reply
3: no reply
4: no reply
/etc/主機.conf
sudo cat /etc/host.conf
# The "order" line is only used by old versions of the C library.
order hosts,bind
multi on
/etc/nsswitch.conf
sudo cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.
passwd: compat
group: compat
shadow: compat
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
nslookup google.com
nslookup google.com
Server: 134.155.96.51
Address: 134.155.96.51#53
Non-authoritative answer:
Name: google.com
Address: 74.125.39.104
Name: google.com
Address: 74.125.39.105
Name: google.com
Address: 74.125.39.106
Name: google.com
Address: 74.125.39.147
Name: google.com
Address: 74.125.39.99
Name: google.com
Address: 74.125.39.103
wget google.com
wget google.com
--2011-08-17 11:05:01-- http://google.com/
Resolving google.com... 74.125.39.99, 74.125.39.103, 74.125.39.104, ...
Connecting to google.com|74.125.39.99|:80...
挖掘 google.com
tracepath 不起作用,但 dig 起作用
dig google.com
; <<>> DiG 9.7.3 <<>> google.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2643
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 4, ADDITIONAL: 4
;; QUESTION SECTION:
;google.com. IN A
;; ANSWER SECTION:
google.com. 175 IN A 74.125.39.103
google.com. 175 IN A 74.125.39.104
google.com. 175 IN A 74.125.39.105
google.com. 175 IN A 74.125.39.106
google.com. 175 IN A 74.125.39.147
google.com. 175 IN A 74.125.39.99
;; AUTHORITY SECTION:
google.com. 104161 IN NS ns4.google.com.
google.com. 104161 IN NS ns3.google.com.
google.com. 104161 IN NS ns1.google.com.
google.com. 104161 IN NS ns2.google.com.
;; ADDITIONAL SECTION:
ns1.google.com. 277325 IN A 216.239.32.10
ns2.google.com. 277325 IN A 216.239.34.10
ns3.google.com. 277325 IN A 216.239.36.10
ns4.google.com. 277325 IN A 216.239.38.10
;; Query time: 2 msec
;; SERVER: 134.155.96.51#53(134.155.96.51)
;; WHEN: Wed Aug 17 11:06:14 2011
;; MSG SIZE rcvd: 260
答案1
不要太擔心 ping,伺服器基礎設施阻止 ping 的情況並不罕見。 Ping 和traceroute 通常使用ICMP。更好的測試是使用wget http://www.google.com
使用 HTTP 的方法。
首先用於host www.google.com
測試 DNS(較舊的 Linux 系統將有nslookup
或dig
取代host
)
$ 託管 www.google.com www.google.com 是 www.l.google.com 的別名。 www.l.google.com 網址為 209.85.143.104 www.l.google.com 網址為 209.85.143.99 $ wget http://www.google.com --12:21:13-- http://www.google.com/ => `index.html' 正在解析 www.google.com... 已完成。 正在連接 www.google.com[209.85.143.99]:80...已連線。 HTTP 請求已傳送,正在等待回應... 200 OK 長度:未指定 [文本/html] [ ] 9,931 167.21K/秒 12:21:14 (167.21 KB/s) - `index.html' 已儲存 [9931]
答案2
你的/etc/resolve.conf是什麼?它應該指向您的路由器
該文件對於連接到互聯網非常重要。
答案3
驗證 Firestarter 防火牆:
chkconfig -l | chkconfig -l | grep 火啟動器
點火器 0:關閉 1:關閉 2:關閉 3:關閉 4:關閉 5:關閉 6:關閉 S:開啟
停用 Firestarter 防火牆:
sudo chkconfig firestarter 關閉
並再次檢查:
chkconfig -l | chkconfig -l | grep 火啟動器
點火器 0:關閉 1:關閉 2:關閉 3:關閉 4:關閉 5:關閉 6:關閉
並停止防火牆:
須藤 firestarter -p
繼續,再嘗試 ping。