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之前发过一个帖子有关Telus, Shaw 的比较, % F; k6 y9 P, v/ b/ q
家用Telus 已经封锁了不少端口。 也随时不通知下说锁就锁, 非常讨厌。
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# _( @ y2 T& o( n x3 IDoes Telus block any ports? * x2 v' l/ i+ O# y: z7 |* H
$ y$ @ C N% d/ d7 i( MThe only packages with no blocked ports at this time are the Server packages. , a2 Y$ Y5 b2 R- O
; f4 @/ I; c0 q. uThe Blocked ports currently are:
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4 T$ g( p: c8 J' tTCP 21 (ftp)' }. w3 ]+ F/ |/ s
Customers running an FTP server will no longer be able to have Internet users connect to their server. Many customers computers are used as FTP servers to store illegal files.
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TCP 25 (smtp)
0 H3 _) c% r$ KCustomers running a SMTP mail server will no longer be able to receive email requests. Also, Telus users will not be able to connect to non-Telus smtp servers on port 25. Prevent mail servers that operate as an open relay. Open relays are used without a customer?s knowledge to sends millions of pieces of Spam.6 O- ^- k: O8 t: t( l
& C% l& F/ u5 gTCP 80 (www)2 [" }3 m+ m' l7 u" w6 P8 e" F5 `
Customers running a Web server will no longer be able to have Internet users connect to their server. Common exploit on old Window IIS server and Linux boxes that are not properly patched.
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: l: r8 E: q2 c6 M/ ETCP 110 (pop3)4 S) ^- G* J O& `1 M( g0 W! `( F
Customers running a POP mail server will no longer be able to have Internet users connect to the server. Prevent mail servers that operate as an open relay. Open relays are used without a customer?s knowledge to sends millions of pieces of Spam.
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; k# |# v. x S; x' xTCP 6667 (ircd)
! Z# P; c* d; O7 m/ l# gCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.3 v2 t4 g1 s3 I: `- k1 h' N
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TCP/UDP 135-139 (dcom and netbios)& n. U3 j) R& [- g+ l
These ports are commonly exploited by worm viruses:
9 B5 O, I4 ^% x& y7 Z135 Windows RPC
0 G$ L/ C: S) ^$ u3 {136 PROFILE Naming System (basically unused)* `( r, E" q$ a/ `" m. W" V
137-139 Windows NetBios
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* K% U, Z; P; v9 t" u2 {TCP/UDP 445 (ms-ds)
$ c9 T3 F I0 f4 l5 P, MMicrosoft Directory Services - Customers that allow legitimate Internet users access to their computers will loose this ability. This allows hackers to directly connect to a Windows based computer and gain total control over the OS.
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9 W) V. A7 L5 A8 Z+ A0 wTCP/UDP 1433-1434 (ms-sql)
& o1 ^, n5 V% v: h6 Z# l5 PMicrosoft SQL server - Customer running an SQL server will no long be able to have Internet user connect to their server. There are several worm viruses that exploit holes in SQL server. |
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