鎶撳寘宸ュ叿 tcpdump 鐢ㄦ硶璇存槑
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鏍囩锛?a href='http://www.mamicode.com/so/1/set' title='set'>set
闃叉 鍛戒护 缃戞閫氫俊 绀轰緥 缃戠粶 sed toc objc鍘熸枃锛?/p>
https://mp.weixin.qq.com/s/m9R2rUYR0zpRLEZXaaQPRg
tcpdump閲囩敤鍛戒护琛屾柟寮忓鎺ュ彛鐨勬暟鎹寘杩涜绛涢€夋姄鍙栵紝鍏朵赴瀵岀壒鎬ц〃鐜板湪鐏垫椿鐨勮〃杈惧紡涓娿€?/p>
涓嶅甫浠讳綍閫夐」鐨則cpdump锛岄粯璁や細鎶撳彇绗竴涓綉缁滄帴鍙o紝涓斿彧鏈夊皢tcpdump杩涚▼缁堟鎵嶄細鍋滄鎶撳寘銆?/p>
渚嬪锛?/p>
shell> tcpdump -nn -i eth0 icmp
涓嬮潰鏄缁嗙殑tcpdump鐢ㄦ硶銆?/p>
1.1 tcpdump閫夐」
瀹冪殑鍛戒护鏍煎紡涓猴細
tcpdump [ -DenNqvX ] [ -c count ] [ -F file ] [ -i interface ] [ -r file ]
[ -s snaplen ] [ -w file ] [ expression ]
鎶撳寘閫夐」锛?br>-c锛氭寚瀹氳鎶撳彇鐨勫寘鏁伴噺銆傛敞鎰忥紝鏄渶缁堣鑾峰彇杩欎箞澶氫釜鍖呫€備緥濡傦紝鎸囧畾"-c 10"灏嗚幏鍙?0涓寘锛屼絾鍙兘宸茬粡澶勭悊浜?00涓寘锛屽彧涓嶈繃鍙湁10涓寘鏄弧瓒虫潯浠剁殑鍖呫€?br>-i interface锛氭寚瀹歵cpdump闇€瑕佺洃鍚殑鎺ュ彛銆傝嫢鏈寚瀹氳閫夐」锛屽皢浠庣郴缁熸帴鍙e垪琛ㄤ腑鎼滃缂栧彿鏈€灏忕殑宸查厤缃ソ鐨勬帴鍙?涓嶅寘鎷琹oopback鎺ュ彛锛岃鎶撳彇loopback鎺ュ彛浣跨敤tcpdump -i lo)锛?br> 锛氫竴鏃︽壘鍒扮涓€涓鍚堟潯浠剁殑鎺ュ彛锛屾悳瀵婚┈涓婄粨鏉熴€傚彲浠ヤ娇鐢ㄢ€榓ny鈥樺叧閿瓧琛ㄧず鎵€鏈夌綉缁滄帴鍙c€?br>-n锛氬鍦板潃浠ユ暟瀛楁柟寮忔樉寮忥紝鍚﹀垯鏄惧紡涓轰富鏈哄悕锛屼篃灏辨槸璇?n閫夐」涓嶅仛涓绘満鍚嶈В鏋愩€?br>-nn锛氶櫎浜?n鐨勪綔鐢ㄥ锛岃繕鎶婄鍙f樉绀轰负鏁板€硷紝鍚﹀垯鏄剧ず绔彛鏈嶅姟鍚嶃€?br>-N锛氫笉鎵撳嵃鍑篽ost鐨勫煙鍚嶉儴鍒嗐€備緥濡倀cpdump灏嗕細鎵撳嵃鈥榥ic鈥樿€屼笉鏄€榥ic.ddn.mil鈥樸€?br>-P锛氭寚瀹氳鎶撳彇鐨勫寘鏄祦鍏ヨ繕鏄祦鍑虹殑鍖呫€傚彲浠ョ粰瀹氱殑鍊间负"in"銆?out"鍜?inout"锛岄粯璁や负"inout"銆?br>-s len锛氳缃畉cpdump鐨勬暟鎹寘鎶撳彇闀垮害涓簂en锛屽鏋滀笉璁剧疆榛樿灏嗕細鏄?5535瀛楄妭銆傚浜庤鎶撳彇鐨勬暟鎹寘杈冨ぇ鏃讹紝闀垮害璁剧疆涓嶅鍙兘浼氫骇鐢熷寘鎴柇锛岃嫢鍑虹幇鍖呮埅鏂紝
锛氳緭鍑鸿涓細鍑虹幇"[|proto]"鐨勬爣蹇?proto瀹為檯浼氭樉绀轰负鍗忚鍚?銆備絾鏄姄鍙杔en瓒婇暱锛屽寘鐨勫鐞嗘椂闂磋秺闀匡紝骞朵笖浼氬噺灏憈cpdump鍙紦瀛樼殑鏁版嵁鍖呯殑鏁伴噺锛?br> 锛氫粠鑰屼細瀵艰嚧鏁版嵁鍖呯殑涓㈠け锛屾墍浠ュ湪鑳芥姄鍙栨垜浠兂瑕佺殑鍖呯殑鍓嶆彁涓嬶紝鎶撳彇闀垮害瓒婂皬瓒婂ソ銆?br>
杈撳嚭閫夐」锛?br>-e锛氳緭鍑虹殑姣忚涓兘灏嗗寘鎷暟鎹摼璺眰澶撮儴淇℃伅锛屼緥濡傛簮MAC鍜岀洰鏍嘙AC銆?br>-q锛氬揩閫熸墦鍗拌緭鍑恒€傚嵆鎵撳嵃寰堝皯鐨勫崗璁浉鍏充俊鎭紝浠庤€岃緭鍑鸿閮芥瘮杈冪畝鐭€?br>-X锛氳緭鍑哄寘鐨勫ご閮ㄦ暟鎹紝浼氫互16杩涘埗鍜孉SCII涓ょ鏂瑰紡鍚屾椂杈撳嚭銆?br>-XX锛氳緭鍑哄寘鐨勫ご閮ㄦ暟鎹紝浼氫互16杩涘埗鍜孉SCII涓ょ鏂瑰紡鍚屾椂杈撳嚭锛屾洿璇︾粏銆?br>-v锛氬綋鍒嗘瀽鍜屾墦鍗扮殑鏃跺€欙紝浜х敓璇︾粏鐨勮緭鍑恒€?br>-vv锛氫骇鐢熸瘮-v鏇磋缁嗙殑杈撳嚭銆?br>-vvv锛氫骇鐢熸瘮-vv鏇磋缁嗙殑杈撳嚭銆?br>
鍏朵粬鍔熻兘鎬ч€夐」锛?br>-D锛氬垪鍑哄彲鐢ㄤ簬鎶撳寘鐨勬帴鍙c€傚皢浼氬垪鍑烘帴鍙g殑鏁板€肩紪鍙峰拰鎺ュ彛鍚嶏紝瀹冧滑閮藉彲浠ョ敤浜?-i"鍚庛€?br>-F锛氫粠鏂囦欢涓鍙栨姄鍖呯殑琛ㄨ揪寮忋€傝嫢浣跨敤璇ラ€夐」锛屽垯鍛戒护琛屼腑缁欏畾鐨勫叾浠栬〃杈惧紡閮藉皢澶辨晥銆?br>-w锛氬皢鎶撳寘鏁版嵁杈撳嚭鍒版枃浠朵腑鑰屼笉鏄爣鍑嗚緭鍑恒€傚彲浠ュ悓鏃堕厤鍚?-G time"閫夐」浣垮緱杈撳嚭鏂囦欢姣弔ime绉掑氨鑷姩鍒囨崲鍒板彟涓€涓枃浠躲€傚彲閫氳繃"-r"閫夐」杞藉叆杩欎簺鏂囦欢浠ヨ繘琛屽垎鏋愬拰鎵撳嵃銆?br>-r锛氫粠缁欏畾鐨勬暟鎹寘鏂囦欢涓鍙栨暟鎹€備娇鐢?-"琛ㄧず浠庢爣鍑嗚緭鍏ヤ腑璇诲彇銆?/code>鎺ㄨ崘缁欎綘锛?a href="http://mp.weixin.qq.com/s?__biz=MzI0MDQ4MTM5NQ==&mid=2247500085&idx=2&sn=5455a50a3ec0fc0a69a7cc910a316ebe&chksm=e918a429de6f2d3f4ba700653b387459cb16dd4bf34cd42b4b0ef53c2dd91a53ce40abf0f2a2&scene=21#wechat_redirect" target="_blank" data-itemshowtype="0" data-linktype="2">鍊煎緱鏀惰棌锛丩inux绯荤粺甯哥敤鍛戒护閫熸煡鎵嬪唽
鎵€浠ュ父鐢ㄧ殑閫夐」涔熷氨杩欏嚑涓細
-
tcpdump -D
-
tcpdump -c num -i int -nn -XX -vvv
1.2 tcpdump琛ㄨ揪寮?/strong>
琛ㄨ揪寮忕敤浜庣瓫閫夎緭鍑哄摢浜涚被鍨嬬殑鏁版嵁鍖咃紝濡傛灉娌℃湁缁欏畾琛ㄨ揪寮忥紝鎵€鏈夌殑鏁版嵁鍖呴兘灏嗚緭鍑猴紝鍚﹀垯鍙緭鍑鸿〃杈惧紡涓簍rue鐨勫寘銆傚湪琛ㄨ揪寮忎腑鍑虹幇鐨剆hell鍏冨瓧绗﹀缓璁娇鐢ㄥ崟寮曞彿鍖呭洿銆?/p>
tcpdump鐨勮〃杈惧紡鐢变竴涓垨澶氫釜"鍗曞厓"缁勬垚锛屾瘡涓崟鍏冧竴鑸寘鍚獻D鐨勪慨楗扮鍜屼竴涓狪D(鏁板瓧鎴栧悕绉?銆傛湁涓夌淇グ绗︼細
(1).type锛氭寚瀹欼D鐨勭被鍨嬨€?/strong>
鍙互缁欏畾鐨勫€兼湁host/net/port/portrange銆備緥濡?host foo"锛?net 128.3"锛?port 20"锛?portrange 6000-6008"銆傞粯璁ょ殑type涓篽ost銆?/p>
(2).dir锛氭寚瀹欼D鐨勬柟鍚戙€?/strong>
鍙互缁欏畾鐨勫€煎寘鎷瑂rc/dst/src or dst/src and dst锛岄粯璁や负src or dst銆備緥濡傦紝"src foo"琛ㄧず婧愪富鏈轰负foo鐨勬暟鎹寘锛?dst net 128.3"琛ㄧず鐩爣缃戠粶涓?28.3鐨勬暟鎹寘锛?src or dst port 22"琛ㄧず婧愭垨鐩殑绔彛涓?2鐨勬暟鎹寘銆?/p>
(3).proto锛氶€氳繃缁欏畾鍗忚闄愬畾鍖归厤鐨勬暟鎹寘绫诲瀷銆?/strong>
甯哥敤鐨勫崗璁湁tcp/udp/arp/ip/ether/icmp绛夛紝鑻ユ湭缁欏畾鍗忚绫诲瀷锛屽垯鍖归厤鎵€鏈夊彲鑳界殑绫诲瀷銆備緥濡?tcp port 21"锛?udp portrange 7000-7009"銆?/p>
鎵€浠ワ紝涓€涓熀鏈殑琛ㄨ揪寮忓崟鍏冩牸寮忎负"proto dir type ID"
闄や簡浣跨敤淇グ绗﹀拰ID缁勬垚鐨勮〃杈惧紡鍗曞厓锛岃繕鏈夊叧閿瓧琛ㄨ揪寮忓崟鍏冿細gateway锛宐roadcast锛宭ess锛実reater浠ュ強绠楁湳琛ㄨ揪寮忋€?/p>
琛ㄨ揪寮忓崟鍏冧箣闂村彲浠ヤ娇鐢ㄦ搷浣滅" and / && / or / || / not / ! "杩涜杩炴帴锛屼粠鑰岀粍鎴愬鏉傜殑鏉′欢琛ㄨ揪寮忋€傚"host foo and not port ftp and not port ftp-data"锛岃繖琛ㄧず绛涢€夌殑鏁版嵁鍖呰婊¤冻"涓绘満涓篺oo涓旂鍙d笉鏄痜tp(绔彛21)鍜宖tp-data(绔彛20)鐨勫寘"锛屽父鐢ㄧ鍙e拰鍚嶅瓧鐨勫搴斿叧绯诲彲鍦╨inux绯荤粺涓殑/etc/service鏂囦欢涓壘鍒般€?/p>
鍙﹀锛屽悓鏍风殑淇グ绗﹀彲鐪佺暐锛屽"tcp dst port ftp or ftp-data or domain"涓?tcp dst port ftp or tcp dst port ftp-data or tcp dst port domain"鎰忎箟鐩稿悓锛岄兘琛ㄧず鍖呯殑鍗忚涓簍cp涓旂洰鐨勭鍙d负ftp鎴杅tp-data鎴杁omain(绔彛53)銆?/p>
浣跨敤鎷彿"()"鍙互鏀瑰彉琛ㄨ揪寮忕殑浼樺厛绾э紝浣嗛渶瑕佹敞鎰忕殑鏄嫭鍙蜂細琚玸hell瑙i噴锛屾墍浠ュ簲璇ヤ娇鐢ㄥ弽鏂滅嚎""杞箟涓?()"锛屽湪闇€瑕佺殑鏃跺€欙紝杩橀渶瑕佸寘鍥村湪寮曞彿涓€?/p>
1.3 tcpdump绀轰緥
娉ㄦ剰锛宼cpdump鍙兘鎶撳彇娴佺粡鏈満鐨勬暟鎹寘銆?/p>
(1).榛樿鍚姩
tcpdump
榛樿鎯呭喌涓嬶紝鐩存帴鍚姩tcpdump灏嗙洃瑙嗙涓€涓綉缁滄帴鍙?闈瀕o鍙?涓婃墍鏈夋祦閫氱殑鏁版嵁鍖呫€傝繖鏍锋姄鍙栫殑缁撴灉浼氶潪甯稿锛屾粴鍔ㄩ潪甯稿揩銆?/p>
(2).鐩戣鎸囧畾缃戠粶鎺ュ彛鐨勬暟鎹寘
tcpdump -i eth1
濡傛灉涓嶆寚瀹氱綉鍗★紝榛樿tcpdump鍙細鐩戣绗竴涓綉缁滄帴鍙o紝濡俥th0銆?/p>
(3).鐩戣鎸囧畾涓绘満鐨勬暟鎹寘锛屼緥濡傛墍鏈夎繘鍏ユ垨绂诲紑longshuai鐨勬暟鎹寘
tcpdump host longshuai
(4).鎵撳嵃helios<-->hot鎴杊elios<-->ace涔嬮棿閫氫俊鐨勬暟鎹寘
tcpdump host helios and ( hot or ace )
(5).鎵撳嵃ace涓庝换浣曞叾浠栦富鏈轰箣闂撮€氫俊鐨処P鏁版嵁鍖?浣嗕笉鍖呮嫭涓巋elios涔嬮棿鐨勬暟鎹寘
tcpdump ip host ace and not helios
(6).鎴幏涓绘満hostname鍙戦€佺殑鎵€鏈夋暟鎹?/strong>
tcpdump src host hostname
(7).鐩戣鎵€鏈夊彂閫佸埌涓绘満hostname鐨勬暟鎹寘
tcpdump dst host hostname
(8).鐩戣鎸囧畾涓绘満鍜岀鍙g殑鏁版嵁鍖?/strong>
tcpdump tcp port 22 and host hostname
(9).瀵规湰鏈虹殑udp 123绔彛杩涜鐩戣(123涓簄tp鐨勬湇鍔$鍙?
tcpdump udp port 123
(10).鐩戣鎸囧畾缃戠粶鐨勬暟鎹寘锛屽鏈満涓?92.168缃戞閫氫俊鐨勬暟鎹寘锛?-c 10"琛ㄧず鍙姄鍙?0涓寘
tcpdump -c 10 net 192.168
(11).鎵撳嵃鎵€鏈夐€氳繃缃戝叧snup鐨刦tp鏁版嵁鍖?娉ㄦ剰,琛ㄨ揪寮忚鍗曞紩鍙锋嫭璧锋潵浜?杩欏彲浠ラ槻姝hell瀵瑰叾涓殑鎷彿杩涜閿欒瑙f瀽)
shell> tcpdump 鈥榞ateway snup and (port ftp or ftp-data)鈥?/code>
(12).鎶撳彇ping鍖?/strong>
[root@server2 ~]# tcpdump -c 5 -nn -i eth0 icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
12:11:23.273638 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16422, seq 10, length 64
12:11:23.273666 IP 192.168.100.62 > 192.168.100.70: ICMP echo reply, id 16422, seq 10, length 64
12:11:24.356915 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16422, seq 11, length 64
12:11:24.356936 IP 192.168.100.62 > 192.168.100.70: ICMP echo reply, id 16422, seq 11, length 64
12:11:25.440887 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16422, seq 12, length 64
packets captured
packets received by filter
packets dropped by kernel
濡傛灉鏄庣‘瑕佹姄鍙栦富鏈轰负192.168.100.70瀵规湰鏈虹殑ping锛屽垯浣跨敤and鎿嶄綔绗︺€?/p>
[root@server2 ~]# tcpdump -c 5 -nn -i eth0 icmp and src 192.168.100.62
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
12:09:29.957132 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16166, seq 1, length 64
12:09:31.041035 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16166, seq 2, length 64
12:09:32.124562 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16166, seq 3, length 64
12:09:33.208514 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16166, seq 4, length 64
12:09:34.292222 IP 192.168.100.70 > 192.168.100.62: ICMP echo request, id 16166, seq 5, length 64
packets captured
packets received by filter
packets dropped by kernel
娉ㄦ剰涓嶈兘鐩存帴鍐檌cmp src 192.168.100.70锛屽洜涓篿cmp鍗忚涓嶆敮鎸佺洿鎺ュ簲鐢╤ost杩欎釜type銆?/p>
(13).鎶撳彇鍒版湰鏈?2绔彛鍖?/strong>
[root@server2 ~]# tcpdump -c 10 -nn -i eth0 tcp dst port 22
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
12:06:57.574293 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 535528834, win 2053, length 0
12:06:57.629125 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 193, win 2052, length 0
12:06:57.684688 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 385, win 2051, length 0
12:06:57.738977 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 577, win 2050, length 0
12:06:57.794305 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 769, win 2050, length 0
12:06:57.848720 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 961, win 2049, length 0
12:06:57.904057 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 1153, win 2048, length 0
12:06:57.958477 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 1345, win 2047, length 0
12:06:58.014338 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 1537, win 2053, length 0
12:06:58.069361 IP 192.168.100.1.5788 > 192.168.100.62.22: Flags [.], ack 1729, win 2052, length 0
packets captured
packets received by filter
packets dropped by kernel
(14).瑙f瀽鍖呮暟鎹?/strong>
[root@server2 ~]# tcpdump -c 2 -q -XX -vvv -nn -i eth0 tcp dst port 22
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
12:15:54.788812 IP (tos 0x0, ttl 64, id 19303, offset 0, flags [DF], proto TCP (6), length 40)
192.168.100.1.5788 > 192.168.100.62.22: tcp 0
0x0000: 000c 2908 9234 0050 56c0 0008 0800 4500 ..)..4.PV.....E.
0x0010: 0028 4b67 4000 4006 a5d8 c0a8 6401 c0a8 .(Kg@.@.....d...
0x0020: 643e 169c 0016 2426 5fd6 1fec 2b62 5010 d>....$&_...+bP.
0x0030: 0803 7844 0000 0000 0000 0000 ..xD........
12:15:54.842641 IP (tos 0x0, ttl 64, id 19304, offset 0, flags [DF], proto TCP (6), length 40)
192.168.100.1.5788 > 192.168.100.62.22: tcp 0
0x0000: 000c 2908 9234 0050 56c0 0008 0800 4500 ..)..4.PV.....E.
0x0010: 0028 4b68 4000 4006 a5d7 c0a8 6401 c0a8 .(Kh@.@.....d...
0x0020: 643e 169c 0016 2426 5fd6 1fec 2d62 5010 d>....$&_...-bP.
0x0030: 0801 7646 0000 0000 0000 0000 ..vF........
packets captured
packets received by filter
packets dropped by kernel
鎬荤殑鏉ヨ锛宼cpdump瀵瑰熀鏈殑鏁版嵁鍖呮姄鍙栨柟娉曡繕鏄緝绠€鍗曠殑銆傚彧瑕佹帉鎻℃湁闄愮殑鍑犱釜閫夐」(-nn -XX -vvv -i -c -q)锛屽啀缁勫悎琛ㄨ揪寮忓嵆鍙€?/p>
杞嚜锛氶獜椹噾榫?/em>
www.cnblogs.com/f-ck-need-u/p/7064286.html
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