Linux - ½Ã½ºÅÛ °ü¸® : ³×Æ®¿öÅ© ¿¬°á È®ÀÎ
http://develop.sunshiny.co.kr/953
# ³×Æ®¿öÅ© ¿¬°á È®ÀÎ
ethtool ÇÁ·Î±×·¥À» ÀÌ¿ëÇØ ³×Æ®¿öÅ© ¿¬°áÀÌ È°¼ºÈµÅ ÀÖ´ÂÁö È®ÀÎÇÒ ¼ö ÀÖ´Ù.
Link detected °¡ yes·Î ¼³Á¤µÅ ÀÖÀ¸¸é ¹°¸®ÀûÀ¸·Î ³×Æ®¿öÅ©¿¡ ¿¬°áµÅ ÀÖÀ½.
> ¹°¸®Àû(·£ ÄÉÀ̺í)À¸·Î ¿¬°áµÅ Àִ°¡?
Settings for em1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: yes -- ³×Æ®¿öÅ© ÀÎÅÍÆäÀ̽º°¡ È°¼ºÈ µÇ¾î ÀÖ°í, ·£ ÄÉÀ̺íÀÌ ¿¬°áµÈ »óÅÂ
[root@master ~]# ethtool em2
Settings for em2:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: Unknown!
Duplex: Unknown! (255)
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: no -- ³×Æ®¿öÅ© ÀÎÅÍÆäÀ̽º°¡ È°¼ºÈ µÇ¾î ÀÖ°í, ·£ ÄÉÀ̺íÀÌ ¿¬°áµÇÁö ¾ÊÀº »óÅÂ
> ³×Æ®¿öÅ© ÀÎÅÍÆäÀ̽º°¡ »ì¾Æ Àִ°¡?
em1 Link encap:Ethernet HWaddr D0:67:E5:E9:B0:A7
inet addr:192.168.1.19 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::d267:e5ff:fee9:b0a7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1709265 errors:0 dropped:0 overruns:0 frame:0
TX packets:18969 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:186713337 (178.0 MiB) TX bytes:11149025 (10.6 MiB) -- È°¼º »óÅÂ
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) -- ÀÎÅÍÆäÀ̽º´Â Á¸ÀçÇÏÁö¸¸, ºñÈ°¼º »óÅÂ
Interrupt:16 Memory:c0000000-c0012800
> ·ÎÄà ³×Æ®¿öÅ©¿¡ Àִ°¡?
ÀÎÅÍÆäÀ̽º°¡ È°¼ºÈµÅ ÀÖÀ¸¸é, ±âº» °ÔÀÌÆ®¿þÀÌ°¡ ¼³Á¤µÅ ÀÖ°í ÇØ´ç °ÔÀÌÆ®¿þÀÌ¿¡ Á¢±ÙÇÒ ¼ö ÀÖ´ÂÁö È®ÀÎ.
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 em1
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 em2
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 em1
°ü½É ÀÖ°Ô ºÁ¾ßÇÒ ³»¿ëÀº default·Î ½ÃÀÛÇÏ´Â ¸¶Áö¸· ÁÙÀÌ´Ù.
¿©±â¼ È£½ºÆ®°¡ 192.168.1.1ÀÇ °ÔÀÌÆ®¿þÀ̸¦ °¡Áö°í ÀÖÀ½À» È®ÀÎÇÒ ¼ö ÀÖ´Ù.
route ¸í·É¾î¸¦ -n ¿É¼Ç°ú ÇÔ²² »ç¿ëÇϸé IP ÁÖ¼Ò¸¦ È£½ºÆ®¸íÀ¸·Î º¯È¯ÇÏÁö ¾Ê´Â´Ù´Â °ÍÀ» ÁÖ¸ñ.
> DNS°¡ µ¿ÀÛ ÁßÀΰ¡?
Server: 164.124.101.2
Address: 164.124.101.2#53
Non-authoritative answer:
Name: daum.net
Address: 61.111.62.173
Name: daum.net
Address: 110.45.215.23
Name: daum.net
Address: 114.108.157.19
Name: daum.net
Address: 114.108.157.50
> ¿ø°Ý È£½ºÆ®·Î ã¾Æ°¥ ¼ö Àִ°¡?
- traceroute ÆÐÅ°Áö ¼³Ä¡
# apt-get install tcptracroute
traceroute¸¸ tcptraceroute·Î ´ëüÇؼ traceroute¿¡¼ Çß´ø °Í°ú °°Àº ¸í·É¾î¸¦ ½ÇÇà
traceroute to daum.net (61.111.62.173), 30 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 0.669 ms 1.125 ms 1.563 ms
2 1.234.179.1 (1.234.179.1) 10.478 ms 10.552 ms 10.672 ms
3 211.202.29.249 (211.202.29.249) 9.969 ms 10.077 ms 10.195 ms
4 58.229.39.49 (58.229.39.49) 10.833 ms 10.954 ms 11.075 ms
5 118.221.6.21 (118.221.6.21) 11.308 ms 58.229.10.253 (58.229.10.253) 13.016 ms 118.221.6.21 (118.221.6.21) 11.451 ms
6 118.221.4.6 (118.221.4.6) 11.617 ms 2.504 ms 118.221.5.206 (118.221.5.206) 9.463 ms
7 211.44.125.82 (211.44.125.82) 10.144 ms 10.275 ms 10.395 ms
8 210.120.102.193 (210.120.102.193) 9.630 ms 9.753 ms 9.896 ms
9 211.233.55.86 (211.233.55.86) 10.551 ms 10.686 ms 182.162.1.10 (182.162.1.10) 10.873 ms
10 * * *
11 * * *
12 * * *
> ¿ø°Ý Æ÷Æ®°¡ ¿·Á Àִ°¡?
telnet ¸í·ÉÀ» ÀÌ¿ëÇÑ Æ÷Æ® È®ÀÎ
Trying 192.168.1.19...
Connected to 192.168.1.19.
Escape character is '^]'.
SSH-2.0-OpenSSH_5.3
nmap ¸í·ÉÀ» ÀÌ¿ëÇÑ Æ÷Æ® È®ÀÎ
Æ÷Æ®¸¦ Å×½ºÆ®Çϱâ À§ÇØ ÅÚ³Ý ´ë½Å nmap¸¦ »ç¿ëÇÏ´Â ¹æ¹ýÀ» ´õ ¼±È£ÇÑ´Ù.
nmapÀº Á¾Á¾ ¹æȺ®À» ¹ß°ßÇØ ³¾ ¼ö Àֱ⠶§¹®ÀÌ´Ù.
ÀϹÝÀûÀ¸·Î ¹æȺ® Â÷´ÜÀÌ ¾ø°í, Æ÷Æ®°¡ ½ÇÁ¦ ´Ù¿îµÆÀ» ¶§´Â Æ÷Æ®°¡ ´ÝÇô(closed)ÀÖ´Ù°í ¾Ë·ÁÁØ´Ù.
filtered »óÅ´ ÇØ´ç ¼ºñ½º°¡ ½ÇÇàÁßÀ̵ç, ¾Æ´Ïµç 1Â÷ÀûÀ¸·Î ¹æȺ®¿¡¼ Â÷´Ü ÇÏ°í ÀÖ´Â »óȲ.
(¼ºñ½ºÀÇ ½ÇÇà, ÁßÁö ¿©ºÎ È®ÀÎ ¾î·Á¿ò)
nmap ¼³Ä¡
# yum install nmap
Starting Nmap 5.51 ( http://nmap.org ) at 2013-09-03 09:36 KST
Nmap scan report for daum.net (61.111.62.173)
Host is up (0.0036s latency).
Other addresses for daum.net (not scanned): 110.45.215.23 114.108.157.19 114.108.157.50
rDNS record for 61.111.62.173: 61-111-62-173.kidc.net
PORT STATE SERVICE
80/tcp open http
Nmap done: 1 IP address (1 host up) scanned in 0.20 seconds
> oracle ±âº» Æ÷Æ® 1521ÀÌ ÇÊÅ͸µ µÊ(filtered)
Starting Nmap 5.51 ( http://nmap.org ) at 2013-09-03 09:36 KST
Nmap scan report for daum.net (114.108.157.19)
Host is up (0.0034s latency).
Other addresses for daum.net (not scanned): 114.108.157.50 61.111.62.173 110.45.215.23
PORT STATE SERVICE
1521/tcp filtered oracle
Nmap done: 1 IP address (1 host up) scanned in 0.48 seconds
> 80 Æ÷Æ®°¡ ´ÝÇô(closed)ÀÖ´Ù°í ¾Ë·ÁÁÜ : closed ´Â ¼ºñ½º°¡ ½ÇÇàµÇÁö ¾Ê´Â »óŶó´Â ÀǹÌ
Starting Nmap 5.51 ( http://nmap.org ) at 2013-09-03 09:39 KST
Nmap scan report for 192.168.1.190
Host is up (0.00043s latency).
PORT STATE SERVICE
80/tcp closed http
MAC Address: 00:13:20:81:BA:BF (Intel Corporate)
Nmap done: 1 IP address (1 host up) scanned in 0.10 seconds
> ¸®½º´× Æ÷Æ® Á¶È¸
- netstat ¿É¼Ç
-l : --listening display listening server sockets
-n : --numeric don't resolve names
-p : --programs display PID/Program name for sockets
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 919/apache
ù ¹ø° Ä®·³Àº Æ÷Æ®°¡ »ç¿ë ÁßÀÎ ÇÁ·ÎÅäÄÝÀ» ¾Ë·ÁÁØ´Ù.
µÎ ¹ø°¿Í ¼¼ ¹ø° Ä®·³Àº ¼ö½Å°ú ¼Û½Å Å¥(¿©±â¼´Â µÑ´Ù 0À¸·Î ¼³Á¤µÅ ÀÖÀ½)
°ü½ÉÀ» µÖ¾ß ÇÏ´Â Ä®·³Àº ÇØ´ç È£½ºÆ®°¡ ¸®½º´×ÇÏ´Â ·ÎÄà ÁÖ¼Ò°¡ ³ª¿µÈ ³× ¹ø° Ä®·³ÀÌ´Ù.
¿©±â¼ 0.0.0.0:80 Àº È£½ºÆ®°¡ ¸ðµç IP¿¡ ´ëÇØ 80¹ø Æ÷Æ® Æ®·¡ÇÈÀ» ¸®½º´×ÇÏ°í ÀÖÀ½À» ÀǹÌÇÑ´Ù.
¾ÆÆÄÄ¡°¡ À¥¼¹öÀÇ ÀÌ´õ³Ý ÁÖ¼Ò¿¡¼¸¸ ¸®½º´×ÇÏ°í ÀÖ´Ù¸é ³× ¹ø° Ä®·³¿¡ ·ÎÄþÆÀÌÇÇ:80 À¸·Î Ç¥½ÃµÉ °ÍÀÌ´Ù.
> ¿¬°á Æ÷Æ® Á¶È¸
tcp 0 0 192.168.1.199:80 123.11.23.21:57552 ESTABLISHED -
Âü°í µµ¼ : µ¥ºê¿É½º