连接超时java HttpClient库中的异常，但不是通过Chrome浏览器？

Question

I have blocked a port 8070 by the following command:

sudo iptables -A INPUT -p tcp --destination-port 8070 -j DROP

Now, when I deploy my web application in embedded Tomcat 7 on port 8070, and If I access through the URL http://localhost:8070/app or http://192.168.1.3:8070/app , I always get the exception Connection timed out . That is usual because I have blocked that port.

But when I access the URL http://192.168.1.3:8070/app through the chrome browser, I get the Connection Timed out error message. That is also as expected. But When I try to access http://localhost:8070/app through chrome browser, It gives me successful response. This is unusual.

Why I am able to access through browser on localhost, but not through Apache HttpClient library?

Answer 1

Note, that this should be on serverfault.com .

But you should try indicating your network interface for iptables like this:

iptables -A INPUT -p tcp -s 192.168.1.3 --destination-port 8070 -j DROP
iptables -A INPUT -p tcp -s localhost --destination-port 8070 -j DROP

Answer 2

Chrome uses IPv6 so it can resolve localhost using that, the other examples are using IPv4. So check your hosts file if it contains an ::1 entry for localhost?

You can try with no IPv6 for chrome as well with this command line flag:

--disable-ipv6