npm 명령어로 socket.io , websocket, express 등등의 하위 모듈을 설치하려고 하니 계속 에러가 나는데

로그 아시는분 조언좀 부탁드립니다~~

30 verbose stack Error: connect ETIMEDOUT ip:443

30 verbose stack     at Object.exports._errnoException (util.js:1020:11)

30 verbose stack     at exports._exceptionWithHostPort (util.js:1043:20)

30 verbose stack     at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1090:14)

31 verbose cwd /home/node/socket

32 error Linux 3.10.0-693.el7.x86_64

33 error argv "/usr/bin/node" "/usr/bin/npm" "install" "websocket"

34 error node v6.12.3

35 error npm  v3.10.10

36 error code ETIMEDOUT

37 error errno ETIMEDOUT

38 error syscall connect

39 error network connect ETIMEDOUT ip:443

40 error network This is most likely not a problem with npm itself

40 error network and is related to network connectivity.

40 error network In most cases you are behind a proxy or have bad network settings.

40 error network

40 error network If you are behind a proxy, please make sure that the

40 error network 'proxy' config is set properly.  See: 'npm help config'