❶ 濡備綍閰嶇疆TCP/IP鍗忚灞炴у浘
銆銆鏂规硶濡備笅锛
銆銆1銆佺偣鍑诲紑濮嬶紝鐐瑰嚮杩愯岋紱
銆銆2銆佽緭鍏ncpa.cpl锛岀偣鍑荤‘瀹氾紱
銆銆3銆佸彸鍑绘湰鍦拌繛鎺ワ紝鐐瑰嚮灞炴э紱
銆銆4銆佸弻鍑籭nternet鍗忚 tcp/ip v4锛
銆銆5銆佺偣鍑讳娇鐢ㄤ笅闈㈢殑ip鍦板潃锛屼緷娆¤緭鍏ip鍦板潃銆佸瓙缃戞帺鐮併侀粯璁ょ綉鍏冲拰dns鏈嶅姟鍣ㄥ湴鍧锛岀偣鍑荤‘瀹氬嵆鍙銆
❷ tcp/ip鎵嬪姩閰嶇疆涓昏佹槸鍝鍥涗釜鍙傛暟
1銆乀CP/IP鍙傛暟璁剧疆锛氭柟娉1锛氫粠鈥滄帶鍒堕潰鏉库濅腑璁剧疆锛1锛夊紑濮–璁剧疆–鎺у埗闈㈡澘–鍙屽嚮鈥滅綉缁溾濆浘鏍囷紝鍗曞嚮鈥濋厤缃鈥濓紝鍑虹幇濡傚浘1鎵绀虹殑绐楀彛銆傦紙2锛夊崟鍑烩淭CP/IP-銆夌綉鍗＄被鍨嬪悕鈥濓紝鍐嶅崟鍑烩滃睘鎬р濓紝鍑虹幇瀵硅瘽妗嗐2銆佹垜浠鐜板湪鍦ㄥ钩鏃朵娇鐢ㄧ數鑴戞椂锛屾秹鍙婂埌鐨凾CP/IP鍗忚鐨勫弬鏁颁富瑕佹湁锛歍CP/IP鍦板潃銆佸瓙缃戞帺鐮併佺綉鍏炽丏NS銆3銆佹寚瀹氭湰鏈虹殑IP鍦板潃鍙婂瓙缃戞帺鐮併佹寚瀹氱綉鍏冲拰鍩熷悕鏈嶅姟鍣ㄥ湴鍧銆傜綉缁滃眰寮曞叆浜咺P鍗忚锛屽埗瀹氫簡涓濂楁柊鍦板潃锛屼娇寰楁垜浠鑳藉熷尯鍒嗕袱鍙颁富鏈烘槸鍚﹀悓灞炰竴涓缃戠粶锛岃繖濂楀湴鍧灏辨槸缃戠粶鍦板潃锛屼篃灏辨槸鎵璋撶殑IP鍦板潃銆4銆両nternet鍗忚(TCP/IP)鐨勫弬鏁帮紝鍏堟彁鏉′欢浣犵殑缃戠粶鏄灞鍩熺綉锛屽剁敤鐨勭數淇ADSL鍜岀綉閫氭槸涓嶉渶瑕佽剧疆鐨勶紝浠栦滑鏄闈犳嫧鍙蜂笂缃戠殑銆5銆侀厤缃闈欐乼cp/ip鍙傛暟鐨勬搷浣滀富瑕佸寘鎷涓変釜鏂归潰鍒嗗埆涓烘寚瀹氭湰鏈虹殑IP鍦板潃鍙婂瓙缃戞帺鐮併佹寚瀹氱綉鍏冲拰鍩熷悕鏈嶅姟鍣ㄥ湴鍧銆俆CP/IP浼犺緭鍗忚鏄淇濊瘉缃戠粶鏁版嵁淇℃伅鍙婃椂銆佸畬鏁翠紶杈撶殑涓や釜閲嶈佺殑鍗忚銆
❸ linux閰嶇疆绔鍙linux閰嶇疆绔鍙
鎬庢牱寮鏀惧拰鍏抽棴绔鍙ｏ紵
涓銆佹煡鐪嬪摢浜涚鍙ｈ鎵撳紑netstat-anp浜屻佸叧闂绔鍙ｅ彿:iptables-AINPUT-ptcp–drop绔鍙ｅ彿-jDROPiptables-AOUTPUT-ptcp–dport绔鍙ｅ彿-jDROP涓夈佹墦寮绔鍙ｅ彿锛歩ptables-AINPUT-ptcp–dport绔鍙ｅ彿-jACCEPT鍥涖佷互涓嬫槸linux鎵撳紑绔鍙ｅ懡浠ょ殑浣跨敤鏂规硶銆俷c-lp23(鎵撳紑23绔鍙ｏ紝鍗硉elnet)netstat-an|grep23(鏌ョ湅鏄鍚︽墦寮23绔鍙)浜斻乴inux鎵撳紑绔鍙ｅ懡浠ゆ瘡涓涓鎵撳紑鐨勭鍙ｏ紝閮介渶瑕佹湁鐩稿簲鐨勭洃鍚绋嬪簭鎵嶅彲浠ラ傚悎鍏ラ棬鐨勫︿範閫斿緞锛岃烽槄璇汇奓inux灏辫ヨ繖涔堝︺
Linux鏈嶅姟鍣ㄥ備綍寮鏀剧鍙ｏ紝閰嶇疆闃茬伀澧欙紵
鎵撳紑閰嶇疆鏂囦欢
鍛戒护浠ｇ爜
#vi/etc/sysconfig/iptables
姝ｇ‘鐨勯厤缃鏂囦欢
閰嶇疆浠ｇ爜
#-config-firewall
#.
*filter
:INPUTACCEPT
:FORWARDACCEPT
:OUTPUTACCEPT
-AINPUT-mstate_stateESTABLISHED,RELATED-jACCEPT
-AINPUT-picmp-jACCEPT
-AINPUT-ilo-jACCEPT
-AINPUT-mstate_stateNEW-mtcp-ptcp_dport22-jACCEPT
-AINPUT-mstate_stateNEW-mtcp-ptcp_dport80-jACCEPT
-AINPUT-jREJECT_reject-withicmp-host-prohibited
-AFORWARD-jREJECT_reject-withicmp-host-prohibited
COMMIT
閰嶇疆閫氶厤浠ｇ爜
-AINPUT-mstate_stateNEW-mtcp-ptcp_dport*-jACCEPT
娉ㄦ剰鐐癸細鏂板紑鏀剧殑绔鍙ｄ竴瀹氳佸湪绔鍙22鍚庨潰
閲嶅惎闃茬伀澧欎娇閰嶇疆鐢熸晥
鍛戒护浠ｇ爜
#/etc/init.d/iptablesrestart
鍏跺畠
鏌ョ湅寮鏀剧鍙
鍛戒护浠ｇ爜
#/etc/init.d/iptablesstatus
鍏抽棴闃茬伀澧
鍛戒护浠ｇ爜
#/etc/init.d/iptablesstop
linux涓涓绔鍙ｅ彲浠ヨ繍琛屽嚑涓杩涚▼锛屾瘮濡傛垜鍚屾椂鎵撳紑2涓娴忚堝櫒锛岄偅灞炰簬鍑犱釜绔鍙ｅ憿锛
姣忎釜绔鍙ｄ笂鍙浠ヨ繍琛岃稿氫釜杩涚▼锛屾瘡涓杩涚▼閮藉彲浠ヨ皟鐢ㄥ悓涓涓绔鍙ｏ紝浣嗘槸褰撴湁涓涓杩涚▼鍦ㄥ崰鐢ㄨョ鍙ｆ椂锛屽叾浠栬繘绋嬩細绛夊緟锛岀瓑鍓嶄竴涓杩涚▼閲婃斁璇ョ鍙ｅ悗鎵嶅彲浠ョ敱涓嬩竴涓杩涚▼璋冪敤銆
linux绯荤粺涓鎬庝箞绂佺敤绔鍙ｏ紵
1銆佺鍙ｄ竴鑸瀵瑰簲浜庣浉搴旂殑缃戠粶鏈嶅姟绋嬪簭锛岃佺佺敤绔鍙ｏ紝鍙浠ュ厛鏌ョ湅绔鍙ｆ墍瀵瑰簲鐨勬湇鍔°傜劧鍚庡皢鏈嶅姟鍏抽棴銆俷etstat-antup
2銆佷篃鍙浠ラ氳繃iptables灏嗗叾绂佺敤锛屼互8080绔鍙ｄ负渚嬶紝鎵ц屽備笅鍛戒护锛歩ptables-AINPUT-ptcp–dport8080-jDROPiptables-AINPUT-ptcp–sport8080-jDROPiptables-AINPUT-pudp–dport8080-jDROPiptables-AINPUT-pudp–sport8080-jDROP
linuxwiki鎬庝箞鍚鐢8080绔鍙ｏ紵
/sbin/iptables?-I?INPUT?-p?tcp?–dport?8080?-j?ACCEPT????#寮鍚8080绔鍙/etc/rc.d/init.d/iptables?save???????????????????????????#淇濆瓨闃茬伀澧欑殑鏇存敼
