networking

问题 I need to write a web application which receives a lot of HTTP requests and takes a long time (30s to 2min) to process each request (in turn making other network requests) before returning a response. Because there would be a lot of requests coming in and those connections are held open I'm thinking of going down an event driven route, which leads me to think Netty is appropriate. If each request takes a long time to process, is that going to block netty's processing? Or can I receive a

问题 I have an application that uses the System.Net.Security.SslStream class to make a secure connection to a server. On Windows 7 and Windows 8/8.1, this works fine. On Windows 10, the call to SslStream.AuthenticateAsClient throws an exception - "AuthenticationException: A call to SSPI failed, see inner exception". The inner exception is "Win32Exception: The Local Security Authority cannot be contacted". This is not specific to one Windows 10 machine. I thought that it might have something to do

问题 I have an application that uses the System.Net.Security.SslStream class to make a secure connection to a server. On Windows 7 and Windows 8/8.1, this works fine. On Windows 10, the call to SslStream.AuthenticateAsClient throws an exception - "AuthenticationException: A call to SSPI failed, see inner exception". The inner exception is "Win32Exception: The Local Security Authority cannot be contacted". This is not specific to one Windows 10 machine. I thought that it might have something to do

问题 I am using bash to get the IP address of my machine with that script: _MyGW="$( ip route get 8.8.8.8 | awk 'N=3 {print $N}' )" And now I am trying to get the Subnet Mask in this type: 192.168.1.0/24 But I have no idea how can I do that. 回答1: there are couple of ways to achieve this: first: to print the mask in format 255.255.255.0, you can use this: /sbin/ifconfig wlan0 | awk '/Mask:/{ print $4;} ' second: we can use ip command to get the mask in format 192.168.1.1/24 ip -o -f inet addr show

问题 The problem Inside nginx-proxy Docker container (more info below), I always see the same IP adress for every connection: 172.18.0.1 (which is the nginx-proxy network gateway). For example: nginx.1 | www.my-site.tld 172.18.0.1 - - [28/Nov/2017:17:22:21 +0000] "GET /some/path HTTP/2.0" 200 46576 "https://www.my-site.tld/some/path" "Mozilla/5.0 (Linux; Android 4.4.2; PSP5507DUO Build/KVT49L) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 YaBrowser/17.10.0.446.00 Mobile Safari/537.36

问题 Docker creates these virtual ethernet interfaces veth[UNIQUE ID] listed in ifconfig . How can I find out which interface belongs to a specific docker container? I want to listen to the tcp traffic. 回答1: To locate interface In my case getting value from container was like (check eth0 to): $ docker exec -it my-container cat /sys/class/net/eth1/iflink 123 And then: $ ip ad | grep 123 123: vethd3234u4@if122: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker_gwbridge state UP

问题 Docker creates these virtual ethernet interfaces veth[UNIQUE ID] listed in ifconfig . How can I find out which interface belongs to a specific docker container? I want to listen to the tcp traffic. 回答1: To locate interface In my case getting value from container was like (check eth0 to): $ docker exec -it my-container cat /sys/class/net/eth1/iflink 123 And then: $ ip ad | grep 123 123: vethd3234u4@if122: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker_gwbridge state UP

问题 I have a server with two separate Ethernet connections. When I bind a socket in python it defaults to one of the two networks. How do I pull a multicast stream from the second network in Python? I have tried calling bind using the server's IP address on the second network, but that hasn't worked. 回答1: I recommend you don't use INADDR_ANY. In production multicast environments you want to be very specific with your multicast sockets and don't want to be doing things like sending igmp joins out

问题 I have a server with two separate Ethernet connections. When I bind a socket in python it defaults to one of the two networks. How do I pull a multicast stream from the second network in Python? I have tried calling bind using the server's IP address on the second network, but that hasn't worked. 回答1: I recommend you don't use INADDR_ANY. In production multicast environments you want to be very specific with your multicast sockets and don't want to be doing things like sending igmp joins out

问题 I have a server with two separate Ethernet connections. When I bind a socket in python it defaults to one of the two networks. How do I pull a multicast stream from the second network in Python? I have tried calling bind using the server's IP address on the second network, but that hasn't worked. 回答1: I recommend you don't use INADDR_ANY. In production multicast environments you want to be very specific with your multicast sockets and don't want to be doing things like sending igmp joins out