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之前发过一个帖子有关Telus, Shaw 的比较, 0 A% B; ?% K# X5 r- A6 i
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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5 G7 V# h" P/ v: p- U8 J* P4 NDoes Telus block any ports? 0 f! d' k, X% N' t& j& J
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The only packages with no blocked ports at this time are the Server packages. + t! l3 u3 q0 M ]# o" _
. _4 m$ l6 Y; e8 v. e$ t; iThe Blocked ports currently are:
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TCP 21 (ftp)% x& V/ H; t# L/ w/ i3 F6 L9 h
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)# O3 L; g1 t& M+ z3 X& T, s
Customers 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.' f3 k9 J, h; g) H
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TCP 80 (www)7 [, g: S$ M/ k+ v
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.; p! x+ ^4 e/ E! k* d6 S- l$ R
5 p' E: ^. e8 TTCP 110 (pop3)2 }# U/ N2 \" y
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.1 v l+ S. U% N! v$ \+ d% p; t, A
. |- {. U* S0 D/ I a6 WTCP 6667 (ircd); B% o* s; {1 G8 b, v, g0 |
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.! `- t: f8 G4 i9 z9 M- i: d
8 A3 F, m! c- l0 S2 F; STCP/UDP 135-139 (dcom and netbios)$ O- Y) C% i U/ [1 m
These ports are commonly exploited by worm viruses:3 J7 @8 j( O- Q2 d, z
135 Windows RPC
6 g% B; p, x- u2 \) H136 PROFILE Naming System (basically unused)
, V7 K6 X# K( @5 b! @+ z' E2 c% v137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
* B6 r( m& K9 R1 `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., z2 m" e* ?* Z: m# a. ^
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TCP/UDP 1433-1434 (ms-sql)& j. U5 c8 |) T% @
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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