# 哪些端口无法访问？

<a>出于安全因素考虑，部分运营商会对下列端口进行拦截，导致无法访问。建议避免使用下列端口：</a>

<div id="bkmrk-%E5%8D%8F%E8%AE%AE-%E4%B8%8D%E6%94%AF%E6%8C%81%E7%AB%AF%E5%8F%A3-tcp-42-135-"><div><table border="1" cellpadding="4" cellspacing="0" frame="border" id="bkmrk-%E5%8D%8F%E8%AE%AE-%E4%B8%8D%E6%94%AF%E6%8C%81%E7%AB%AF%E5%8F%A3-tcp-42-135--0" rules="all" summary=""><thead align="left"><tr id="bkmrk-%E5%8D%8F%E8%AE%AE-%E4%B8%8D%E6%94%AF%E6%8C%81%E7%AB%AF%E5%8F%A3"><th align="left" class="cellrowborder" id="bkmrk-%E5%8D%8F%E8%AE%AE" valign="top" width="12.120000000000001%">协议

</th><th align="left" class="cellrowborder" id="bkmrk-%E4%B8%8D%E6%94%AF%E6%8C%81%E7%AB%AF%E5%8F%A3" valign="top" width="87.88%">不支持端口

</th></tr></thead><tbody><tr id="bkmrk-tcp-42-135-137-138-1"><td class="cellrowborder" headers="mcps1.3.2.1.3.1.1 " valign="top" width="12.120000000000001%">TCP

</td><td class="cellrowborder" headers="mcps1.3.2.1.3.1.2 " valign="top" width="87.88%">[42 135 137 138 139](tel:42%20135%20137%20138%20139) [444 445 593 1025](tel:444%20445%20593%201025) [1068 1434 3127 3128](tel:1068%201434%203127%203128) [3129 3130 4444 4789](tel:3129%203130%204444%204789) [4790 5554 5800 5900](tel:4790%205554%205800%205900) 9996

</td></tr><tr id="bkmrk-udp-135%7E139-1026-102"><td class="cellrowborder" headers="mcps1.3.2.1.3.1.1 " valign="top" width="12.120000000000001%">UDP

</td><td class="cellrowborder" headers="mcps1.3.2.1.3.1.2 " valign="top" width="87.88%">135~139 [1026 1027 1028 1068](tel:1026%201027%201028%201068) [1433 1434 4789 4790](tel:1433%201434%204789%204790) [5554 9996](tel:5554%209996)

</td></tr></tbody></table>

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