一個(gè)簡(jiǎn)單的端口掃描程序:
addstr = "發(fā)現(xiàn)端口" & Str(port) & "打開(kāi)" & Space(5) Select Case port Case 7 plus = "ECHO服務(wù)" Case 21 plus = "FTP服務(wù)★★★★★" Case 25 plus = "SMTP服務(wù)★★" Case 43 plus = "Whois服務(wù)" Case 53 plus = "DNS服務(wù)☆" Case 80 plus = "HTTP服務(wù)★★★★★" Case 81 plus = "HOSTS2名稱(chēng)服務(wù)" Case 99 plus = "NCX99后門(mén)★★★★★" Case 110 plus = "pop3服務(wù)★★★★★" Case 111 plus = "Sun RPC服務(wù)★★" Case 135 plus = "本地服務(wù)" Case 137 plus = "NETBIOS 名稱(chēng)服務(wù)/流影POP" Case 138 plus = "NETBIOS 數(shù)據(jù)存儲(chǔ)服務(wù)" Case 139 plus = "NETBIOS 會(huì)議服務(wù)★★★" Case 119 plus = "NNTP虛擬服務(wù)" Case 163 plus = "SNMP服務(wù)" Case 443 plus = "https服務(wù)" Case 512 plus = "遠(yuǎn)程執(zhí)行服務(wù)" Case 513 plus = "login, remote login" Case 514 plus = "cmd, exec with auto auth." Case 600 plus = "Sun IPC服務(wù)器" Case 1080 plus = "SOCKS代理服務(wù)★★★" Case 1433 plus = "SQL服務(wù)器★★★" Case 3128 plus = "HTTP代理服務(wù)" Case 7626 plus = "木馬冰河★★★★★" Case 8080 plus = "HTTP代理服務(wù)" Case Else plus = "未知服務(wù)!"
本書(shū)是關(guān)于C#網(wǎng)絡(luò)開(kāi)發(fā)的教材,主要包括三個(gè)方面內(nèi)容,首先簡(jiǎn)要介紹了有關(guān)C#網(wǎng)絡(luò)開(kāi)發(fā)的基礎(chǔ)知識(shí);接著講解基礎(chǔ)服務(wù)器開(kāi)發(fā)、基礎(chǔ)客戶(hù)端開(kāi)發(fā)、FTP開(kāi)發(fā)、SMTP開(kāi)發(fā)、pop3開(kāi)發(fā)和遠(yuǎn)程控制開(kāi)發(fā);最后是高級(jí)應(yīng)用,包括Win32網(wǎng)絡(luò)組件開(kāi)發(fā)、Web數(shù)據(jù)庫(kù)基礎(chǔ)、Win32異步套接字?jǐn)?shù)據(jù)庫(kù)開(kāi)發(fā)、XML Web Services開(kāi)發(fā)以及一個(gè)完整的分布式網(wǎng)絡(luò)應(yīng)用程序開(kāi)發(fā)實(shí)例。
本書(shū)適合于C#開(kāi)發(fā)人員進(jìn)行網(wǎng)絡(luò)開(kāi)發(fā),對(duì)Visual C++ .NET和Visual Basic.NET開(kāi)發(fā)人員也很有參考意義。