networking

问题 If my development machine has an iptables rule to FORWARD some packets, are those packets being captured by tcpdump? I have this question because I know there exist other chain called INPUT which filters packets to apps, if a packet is routed to FORWARD chain, will it reach tcpdump app? May you make some reliable reference to official documentation or express well explained ideas to solve this question? 回答1: TCPDump captures traffic from the hardware device. Iptables handles network frames at

问题 I am trying to write C++ code programmatically installing NDIS 6.0 lightweight filter driver. After reviewing WinDDK, online examples and MSDN documentation I ended up with the code sample below. ************** hr = InstallSpecifiedComponent( ModuleFileName, L"MS_NdisLwf", &GUID_DEVCLASS_NETSERVICE ); ************** hr = HrInstallNetComponent( pnc, lpszPnpID, pguidClass, lpszInfFile ); ************** if ( !SetupCopyOEMInfW(lpszInfFullPath, DirWithDrive, // Other files are in the same dir.as

问题 I am trying to write C++ code programmatically installing NDIS 6.0 lightweight filter driver. After reviewing WinDDK, online examples and MSDN documentation I ended up with the code sample below. ************** hr = InstallSpecifiedComponent( ModuleFileName, L"MS_NdisLwf", &GUID_DEVCLASS_NETSERVICE ); ************** hr = HrInstallNetComponent( pnc, lpszPnpID, pguidClass, lpszInfFile ); ************** if ( !SetupCopyOEMInfW(lpszInfFullPath, DirWithDrive, // Other files are in the same dir.as

问题 Trying to plot a network with the ggraph package and specify the coordinates of each node. While I can implement this with the igraph package - I cannot do this with the ggraph package. # reproducible example to generate a random graph library(igraph) g1 <- erdos.renyi.game(20, 1/2) plot(g1) # function to produce coordinates for each node in order of the node # degree (number of links per node) coord <- function(g){ n.nod <- length(V(g)) mat.c <- matrix(0, nrow = n.nod, ncol = 2) deg <-

问题 Trying to plot a network with the ggraph package and specify the coordinates of each node. While I can implement this with the igraph package - I cannot do this with the ggraph package. # reproducible example to generate a random graph library(igraph) g1 <- erdos.renyi.game(20, 1/2) plot(g1) # function to produce coordinates for each node in order of the node # degree (number of links per node) coord <- function(g){ n.nod <- length(V(g)) mat.c <- matrix(0, nrow = n.nod, ncol = 2) deg <-

问题 Trying to plot a network with the ggraph package and specify the coordinates of each node. While I can implement this with the igraph package - I cannot do this with the ggraph package. # reproducible example to generate a random graph library(igraph) g1 <- erdos.renyi.game(20, 1/2) plot(g1) # function to produce coordinates for each node in order of the node # degree (number of links per node) coord <- function(g){ n.nod <- length(V(g)) mat.c <- matrix(0, nrow = n.nod, ncol = 2) deg <-

问题 Trying to plot a network with the ggraph package and specify the coordinates of each node. While I can implement this with the igraph package - I cannot do this with the ggraph package. # reproducible example to generate a random graph library(igraph) g1 <- erdos.renyi.game(20, 1/2) plot(g1) # function to produce coordinates for each node in order of the node # degree (number of links per node) coord <- function(g){ n.nod <- length(V(g)) mat.c <- matrix(0, nrow = n.nod, ncol = 2) deg <-

问题 Trying to plot a network with the ggraph package and specify the coordinates of each node. While I can implement this with the igraph package - I cannot do this with the ggraph package. # reproducible example to generate a random graph library(igraph) g1 <- erdos.renyi.game(20, 1/2) plot(g1) # function to produce coordinates for each node in order of the node # degree (number of links per node) coord <- function(g){ n.nod <- length(V(g)) mat.c <- matrix(0, nrow = n.nod, ncol = 2) deg <-

问题 Trying to plot a network with the ggraph package and specify the coordinates of each node. While I can implement this with the igraph package - I cannot do this with the ggraph package. # reproducible example to generate a random graph library(igraph) g1 <- erdos.renyi.game(20, 1/2) plot(g1) # function to produce coordinates for each node in order of the node # degree (number of links per node) coord <- function(g){ n.nod <- length(V(g)) mat.c <- matrix(0, nrow = n.nod, ncol = 2) deg <-

问题 I'm using sqlsrv (php_pdo_sqlsrv_55_ts.dll and php_sqlsrv_55_ts.dll) in PHP (5.5.12) to connect to a MSSQL 2012 Server over a VPN tunnel. But the transfer rate for large result sets is very slow. Testing SSMS on the same PC over the same VPN tunnel for this query: SELECT * FROM [Data].[dbo].[Logins] WHERE date >= '2014-01-27 00:00:00.000' AND date < '2014-01-29 00:00:00.000' returns about 100,000 rows in 4 seconds. Checking the transfer rate on my firewall/VPN shows 2,500 KB/s (on a 100mbit