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之前发过一个帖子有关Telus, Shaw 的比较, * \2 h4 b4 n7 V9 s
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。9 t X: l1 v' [
9 Y( f8 W: K8 N" z0 p# U9 \% QDoes Telus block any ports? 8 E/ R0 H# o. g9 Y& p& G/ y
( z% T+ l a" u" W( z1 z' rThe only packages with no blocked ports at this time are the Server packages. " v" y; t% }0 E% J$ _
8 V5 o, `" }2 T# x. ~- qThe Blocked ports currently are:5 T- \; M. F" [
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TCP 21 (ftp)
$ h) S# q& u" I' hCustomers 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.( k$ X5 ]. i/ _. L6 f e
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TCP 25 (smtp)
% b* `+ U$ \% c& Q% JCustomers 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.
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M8 H9 A x* s1 OTCP 80 (www)
9 s8 X0 Y) |+ _) GCustomers 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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' S/ _ P$ p2 s3 H, [0 cTCP 110 (pop3); w; g2 o7 f- l% x8 u
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.0 a8 B' @1 V) |" |$ J/ E- `
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TCP 6667 (ircd)
/ S% |8 }" G1 G# ~/ V/ {" {( oCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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* a% c5 f7 X v2 @1 i% F+ ATCP/UDP 135-139 (dcom and netbios)% ?. S3 Y w' S
These ports are commonly exploited by worm viruses:
. Q! y! k2 b9 b* M+ c2 \135 Windows RPC
, }6 r, u2 r! A7 h, q136 PROFILE Naming System (basically unused). e5 D N5 {" ^+ f6 G, U) L
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
, e5 h o6 U9 j* q: q5 wMicrosoft 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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$ [2 _' G( z1 d" ETCP/UDP 1433-1434 (ms-sql)7 g" n, [" R G0 F
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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