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之前发过一个帖子有关Telus, Shaw 的比较,
9 K$ @8 k0 @9 V- @ w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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Does Telus block any ports? 5 S+ T0 E; v8 [! x8 T" G
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The only packages with no blocked ports at this time are the Server packages.
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8 O' Y# B" o$ @5 l+ V" q0 g7 lThe Blocked ports currently are:8 {. x% N' X$ Y9 g- [! H: E
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TCP 21 (ftp)* D `4 c* x$ D% w7 m
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)
; r+ ?$ z5 f/ _8 X( R) [* cCustomers 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.8 n) g: P5 g0 C$ e
# }& W& I. W* k; ~TCP 80 (www)" K- @/ x5 U2 m( H2 T) H0 i
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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. @" [+ _4 d* ?) S7 n4 WTCP 110 (pop3)8 u1 J, i+ m" V2 F* @% [) W
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.* x7 b. x1 A! u4 e8 K$ x/ h
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TCP 6667 (ircd)
: Q$ C6 l) x+ _3 P" }4 @; e. H2 ^$ c: lCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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: ]% @5 r7 L3 k" ITCP/UDP 135-139 (dcom and netbios)& k5 S e( A0 B7 {9 r2 l
These ports are commonly exploited by worm viruses:
' o8 A) c+ y, Z- u$ u, z135 Windows RPC# }& Y" N% n- d* R& C6 e2 Z5 K
136 PROFILE Naming System (basically unused)
. X" `7 Q6 z! e% q1 s0 C137-139 Windows NetBios
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% `3 c2 c) h& v7 LTCP/UDP 445 (ms-ds)
) y* i3 S# e j& | Z) y8 _Microsoft 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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TCP/UDP 1433-1434 (ms-sql)' y3 |. e! G: R( M, r6 o
Microsoft 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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