CHECK
NETWORK HARDWARE
[root@Tusharjahdav ~]# lspci -vvv | grep -i eth
02:01.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet Controller
(Copper) (rev 01)
---------------------------------------------------------------------------------------------------------------------
[root@Tusharjahdav ~]# lspci –n ------check Hardware
PCI ID’s
00:00.0 0600: 8086:7190 (rev 01)
00:0f.0 0300: 15ad:0405
02:01.0
0200: 8086:100f (rev 01) ----------LAN CARD
02:02.0 0401: 1274:1371 (rev 02)
---------------------------------------------------------------------------------------------------------------------
What
is 600, 400, 300 PCI ID’s
---------------------------------------------------------------------------------------------------------------------
How
to update PCI ID
[root@Tusharjahdav ~]# yum update pciids
--------------update pci ids
---------------------------------------------------------------------------------------------------------------------
How
to check installed Lan Card Driver
[root@Tusharjahdav ~]# dmesg | grep -i eth -------check
Lan card drivers
R8189 --------------------driver name and extension
is .ko
---------------------------------------------------------------------------------------------------------------------
How
to find driver location
[root@Tusharjahdav
modules]# tree | grep -i eth----find driver path( go to the /lib/module)
│ │ │
├── ethoc.ko
│ │ │
├── forcedeth.ko
│ │ │
│ ├── cdc_ether.ko
│ │ │
│ ├── kaweth.ko
│ │ │
├── veth.ko
[root@Tusharjahdav
modules]# tree | grep -i ip
│ │ │
├── mtip32xx
│ │ │
│ └── mtip32xx.ko
│ │ │
├── ipmi
│ │ │
│ ├── ipmi_devintf.ko
│ │ │
│ ├── ipmi_poweroff.ko
│ │ │
│ └── ipmi_watchdog.ko
│ │ │
│ └── ipwireless
│ │ │
│ └── ipwireless.ko
│ │ │
├── chips
│ │ │
│ ├── ipath
│ │ │
│ │ └── ib_ipath.ko
│ │
│ ├── ipoib
---------------------------------------------------------------------------------------------------------------------
[root@Tusharjahdav modules]# tree | grep -i .ko -----check
all driver
[root@Tusharjahdav modules]# tree | grep –i r8169 ----check lan card drivers and Path
[root@Tusharjahdav modules]# tree | grep –i
[root@Tusharjahdav modules]# tree | grep -i .ko | wc –l
-------Total count of installed drivers
2006
------------------------------------------------------------installed
drivers
---------------------------------------------------------------------------------------------------------------------
KLM
-----LKM | MONOLITHIC | MODULOR
---------------------------------------------------------------------------------------------------------------------
Ethernet
alias name – eth0 / eth1
/ (Driver Name )
mii
tool used for LAN cable connection
[root@Tusharjahdav modules]# mii-tool -v eth0 ----check
media cable connection
eth0: negotiated 100baseTx-FD, link ok
product
info: vendor 00:50:43, model 2 rev 3
basic
mode: autonegotiation enabled
basic
status: autonegotiation complete, link ok
capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD
100baseTx-HD 10baseT-FD 10baseT-HD
link
partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
---------------------------------------------------------------------------------------------------------------------
[root@Tusharjahdav modules]# mii-tool ( help | flags)
No interface specified
usage: mii-tool [-VvRrwl] [-A media,... | -F media]
<interface> ...
-V,
--version display version
information
-v,
--verbose more verbose
output
-R,
--reset reset MII to
poweron state
-r,
--restart restart
autonegotiation
-w,
--watch monitor for link
status changes
-l,
--log with -w, write
events to syslog
-A,
--advertise=media,... advertise only
specified media
-F,
--force=media force specified
media technology
media: 100baseT4, 100baseTx-FD, 100baseTx-HD,
10baseT-FD, 10baseT-HD,
(to
advertise both HD and FD) 100baseTx, 10baseT
---------------------------------------------------------------------------------------------------------------------
[root@Tusharjahdav ~]# ethtool –h -------help
ethtool version 3.5
ethtool -s|--change DEVNAME Change generic options
[ speed %d ]
[ duplex half|full ]
[ port tp|aui|bnc|mii|fibre ]
[ autoneg on|off ]
[ advertise %x ]
[ phyad %d ]
[ xcvr internal|external ]
[ wol p|u|m|b|a|g|s|d... ]
[ sopass %x:%x:%x:%x:%x:%x ]
[ msglvl %d | msglvl type on|off ... ]
---------------------------------------------------------------------------------------------------------------------
How
to check Ethernet properties
[root@Tusharjahdav ~]# ethtool eth0 ----to get the properties
of eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes:
10baseT/Half 10baseT/Full
100baseT/Half
100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes:
10baseT/Half 10baseT/Full
100baseT/Half
100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed:
1000Mb/s
Duplex: Full
Port:
Twisted Pair
PHYAD:
0
Transceiver: internal
Auto-negotiation: on
MDI-X:
Unknown
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link
detected: yes
---------------------------------------------------------------------------------------------------------------------
[root@Tusharjahdav ~]# ethtool -p eth0 -----to
check Lan port (after this command lan port link blinking fast for 5 seconds and
we can identify the port easily )
---------------------------------------------------------------------------------------------------------------------
[root@Tusharjahdav ~]# ifconfig –a ----------------To
check all the interface of lan
eth0 Link
encap:Ethernet HWaddr 00:0C:29:EC:46:4E
inet
addr:192.168.5.159
Bcast:192.168.5.255
Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:feec:464e/64 Scope:Link
UP
BROADCAST RUNNING MULTICAST
MTU:1500 Metric:1
RX
packets:5779780 errors:0 dropped:0 overruns:0 frame:0
TX
packets:122502 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX
bytes:1171990553 (1.0 GiB) TX
bytes:85676256 (81.7 MiB)
lo Link
encap:Local Loopback
inet
addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP
LOOPBACK RUNNING MTU:16436 Metric:1
RX
packets:153 errors:0 dropped:0 overruns:0 frame:0
TX
packets:153 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX
bytes:9358 (9.1 KiB) TX bytes:9358 (9.1
KiB)
---------------------------------------------------------------------------------------------------------------------
HOW TO CONFIGURE IP IN LINUX
[root@Tusharjahdav ~]# ifconfig eth0 192.168.5.160 netmask 255.255.255.0 ---IP ADD but temparory
---------------------------------------------------------------------------------------------------------------------
HOW TO PERMENT IP IN LINUX
[root@Tusharjahdav ~]# cd /etc/sysconfig/network-scripts/
----go to network-scripts dir
[root@Tusharjahdav network-scripts]# ls
ifcfg-eth0 ifdown-bnep
ifdown-ipv6 ifdown-ppp ifdown-tunnel ifup-bnep
ifup-ipv6 ifup-plusb ifup-routes
ifup-wireless network-functions
ifcfg-lo
ifdown-eth ifdown-isdn ifdown-routes
ifup ifup-eth ifup-isdn
ifup-post ifup-sit init.ipv6-global network-functions-ipv6
ifdown
ifdown-ippp ifdown-post ifdown-sit
ifup-aliases ifup-ippp ifup-plip
ifup-ppp ifup-tunnel net.hotplug
ETH0
IP ADD STORE in ifcfg-eth0 FILE
----------for ip persistence files
[root@Tusharjahdav network-scripts]# vi
ifcfg-eth0 -Add IP for permeant(ip configure file )
DEVICE="eth0”
----------------Ethernet port
ONBOOT=yes
-----------------------always yes
BOOTPROTO=none
----------------- (used for STATIC and DHFP)
UUID="1ec719ef-f110-4d98-943b-e36486a4f38a"
HWADDR=00:0C:29:EC:46:4E
---------------------------MAC ADD
IPADDR=192.168.5.160 ----------------------------------IP ADD
NETMASK=255.255.255.0
--------------------------------SUBNET
GATEWAY=192.168.5.1
-------------------------------GW
wq!------save
---------------------------------------------------------------------------------------------------------------------
HOW
TAKE BAKCUP OF ETH0 / NETWORK FILE
[root@Tusharjahdav network-scripts]# cp ifcfg-eth0 eth0-ifcfg.bak
[root@Tusharjahdav network-scripts]# ls
eth0-ifcfg.bak
-----Backup File
ifcfg-eth0 ----------eth0 original file
---------------------------------------------------------------------------------------------------------------------
[root@Tusharjahdav ~]# service network restart ---
Restart all Interface
[root@Tusharjahdav ~]# ifconfig eth0 down
-------Single Port Down
[root@Tusharjahdav ~]# ifconfig eth0 up -------Single
Port UP
[root@Tusharjahdav ~]# ifup eht0
[root@Tusharjahdav ~]# ifdown eht0
---------------------------------------------------------------------------------------------------------------------
HOW TO CONFIGURE IP ADD PERMENT IN LINUX
[root@Tusharjahdav ~]# neat – tui
[root@Tusharjahdav ~]# netconfig
[root@Tusharjahdav ~]# setup ----Configure with Graphic Mode
[root@Localhost
~]# system-config- tab tab---- used for
Graphics mode
system-config-authentication system-config-firewall system-config-keyboard system-config-network-cmd system-config-users system-config-date system-config-firewall-tui system-config-network system-config-network-tui
[root@Tusharjahdav ~]# system-config-network-tui
----Configure with Graphic Mode
---------------------------------------------------------------------------------------------------------------------
IP
Aliasing --Ã IP Additional Configure
Linux
Standard –63 IP Assign to single LAN port & depends upon Lan Card
---------------------------------------------------------------------------------------------------------------------
HOW TO ASSIGN MULTIPLE IP’S TO SINGLE LAN PORT
[root@Tusharjahdav ~]# ifconfig eth0:0 192.168.5.50 netmask 255.255.255.0
[root@Tusharjahdav ~]# ifconfig eth0:1 192.168.4.150 netmask 255.255.255.0
[root@Tusharjahdav ~]# ifconfig eth0:2 192.168.7.190 netmask 255.255.255.0
Above
commands for temporary
[root@Tusharjahdav ~]# ping 192.168.5.50
PING 192.168.5.50 (192.168.5.50) 56(84) bytes of
data.
64 bytes from 192.168.5.50: icmp_seq=1 ttl=64
time=0.082 ms
64 bytes from 192.168.5.50: icmp_seq=2 ttl=64
time=0.050 ms
64 bytes from 192.168.5.50: icmp_seq=1 ttl=64
time=0.042 ms
64 bytes from 192.168.5.50: icmp_seq=2 ttl=64
time=0.049 ms
64 bytes from 192.168.5.50: icmp_seq=3 ttl=64
time=0.047 ms
[root@Tusharjahdav ~]# ping 192.168.4.190
PING 192.168.4.190 (192.168.4.190) 56(84) bytes of
data.
64 bytes from 192.168.4.190: icmp_seq=1 ttl=64
time=0.060 ms
64 bytes from 192.168.4.190: icmp_seq=2 ttl=64
time=0.049 ms
64 bytes from 192.168.4.190: icmp_seq=3 ttl=64
time=0.051 ms
64 bytes from 192.168.4.190: icmp_seq=4 ttl=64
time=0.050 ms
64 bytes from 192.168.4.190: icmp_seq=5 ttl=64
time=0.051 ms
[root@Tusharjahdav ~]# ifconfig –a -----OUT PUT
eth0 Link encap:Ethernet HWaddr 00:0C:29:EC:46:4E
inet addr:192.168.5.159 Bcast:192.168.5.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:feec:464e/64 Scope:Link
UP
BROADCAST RUNNING MULTICAST
MTU:1500 Metric:1
RX
packets:5822412 errors:0 dropped:0 overruns:0 frame:0
TX
packets:127144 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX
bytes:1184719105 (1.1 GiB) TX
bytes:86150544 (82.1 MiB)
eth0:0
Link encap:Ethernet HWaddr 00:0C:29:EC:46:4E
inet addr:192.168.5.50 Bcast:192.168.5.255 Mask:255.255.255.0
UP
BROADCAST RUNNING MULTICAST
MTU:1500 Metric:1
eth0:1 Link encap:Ethernet HWaddr 00:0C:29:EC:46:4E
inet addr:192.168.4.190 Bcast:192.168.4.255 Mask:255.255.255.0
UP
BROADCAST RUNNING MULTICAST
MTU:1500 Metric:1
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP
LOOPBACK RUNNING MTU:16436 Metric:1
RX
packets:165 errors:0 dropped:0 overruns:0 frame:0
TX
packets:165 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX
bytes:10174 (9.9 KiB) TX bytes:10174
(9.9 KiB)
Eth0 ---------- Stand for Interface
IP -------------Stand for Identify
MAC --------Stand for transfer data
RX ----------Stand for Receiving the data
TX ---------- Stand for transfer the data
lo
-------------Stand
for loop bank add (Virtual Interface )
user/app use this interface for testing purpose
Sito
-----IP4 & IP6 Turning
---------------------------------------------------------------------------------------------------------------------
Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }
ip [
-force ] -batch filename
where OBJECT
:= { link | addr | addrlabel | route | rule | neigh | ntable |
tunnel | maddr | mroute | mrule | monitor | xfrm | token }
OPTIONS
:= { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |
-f[amily] { inet | inet6 | ipx | dnet | link } |
-o[neline] | -t[imestamp] | -b[atch] [filename] |
-rc[vbuf] [size]}
---------------------------------------------------------------------------------------------------------------------
[root@Localhost
~]# ip l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc
noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0:
<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen
1000
link/ether
00:0c:29:ec:46:4e brd ff:ff:ff:ff:ff:ff
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# ip addr show ------check ip, mac
and card details
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc
noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet
127.0.0.1/8 scope host lo
inet6
::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:
<BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen
1000
link/ether
00:0c:29:ec:46:4e brd ff:ff:ff:ff:ff:ff
inet
192.168.5.159/24 brd 192.168.5.255 scope global eth0
inet6
fe80::20c:29ff:feec:464e/64 scope link
valid_lft forever preferred_lft forever
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# ip a ------check ip, mac and card details
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc
noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet
127.0.0.1/8 scope host lo
inet6
::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu
1500 qdisc pfifo_fast state UP qlen 1000
link/ether
00:0c:29:ec:46:4e brd ff:ff:ff:ff:ff:ff
inet
192.168.5.159/24 brd 192.168.5.255 scope global eth0
inet6
fe80::20c:29ff:feec:464e/64 scope link
valid_lft forever preferred_lft forever
---------------------------------------------------------------------------------------------------------------------
[root@localhost root]# ip r ------check Lan status
192.168.7.0/24 dev eth0 proto kernel
scope link src 192.168.7.50
192.168.5.0/24 dev eth0 scope link
169.254.0.0/16 dev eth0 scope link
127.0.0.0/8 dev lo
scope link
default via 192.168.5.254 dev eth0
---------------------------------------------------------------------------------------------------------------------
HOW TO CONFIGURE GATEWAY
We can configure Default GATEWAY only one in single system and configure multiple
GETWAY in single system.
[root@Localhost ~]# route –n ------check route and Gateway
Kernel IP routing table
Destination
Gateway Genmask Flags Metric Ref Use Iface
192.168.5.0
0.0.0.0 255.255.255.0 U
1 0 0 eth0
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# route add default gw 192.168.5.1
------Gateway add
[root@Localhost ~]# route –n ------to check Gateway
Kernel IP routing table
Destination
Gateway Genmask Flags Metric Ref Use Iface
192.168.5.0
0.0.0.0 255.255.255.0 U
1 0 0 eth0
0.0.0.0
192.168.5.1 0.0.0.0 UG
0 0 0 eth0
[root@Localhost ~]# route add default gw 192.168.4.1
--I will try 2 Getway in single system
SIOCADDRT: No such process ------------------not accept 2 GETWAY
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# route del default gw 192.168.5.1
-------Delete GATEWAY
[root@Localhost ~]# route –n -------------------to
check
Kernel IP routing table
Destination
Gateway Genmask Flags Metric Ref Use Iface
192.168.5.0
0.0.0.0 255.255.255.0 U
1 0 0 eth0
---------------------------------------------------------------------------------------------------------------------
HOW
TO PERSISTENT OF GATEWAY
[root@Localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0 ----Add gateway entry.
[root@Localhost ~]# vi /etc/sysconfig/network
------- change hostname
[root@Localhost ~]# service network restart
-----restart network
[root@Localhost ~]# route –n -------------------to
check
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# ping -I eth0 192.168.5.15
------send packets to specific netwaork
PING 192.168.5.15 (192.168.5.15) from 192.168.5.159
eth0: 56(84) bytes of data.
64 bytes from 192.168.5.15: icmp_seq=1 ttl=64
time=1.44 ms
64 bytes from 192.168.5.15: icmp_seq=2 ttl=64
time=0.227 ms
64 bytes from 192.168.5.15: icmp_seq=3 ttl=64
time=0.208 ms
64 bytes from 192.168.5.15: icmp_seq=4 ttl=64 time=0.197
ms
64 bytes from 192.168.5.15: icmp_seq=5 ttl=64
time=0.197 ms
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# ping
Usage: ping [-LRUbdfnqrvVaA] [-c count] [-i
interval] [-w deadline]
[-p pattern] [-s packetsize] [-t ttl] [-I interface or address]
[-M mtu discovery hint] [-S sndbuf]
[
-T timestamp option ] [ -Q tos ] [hop1 ...] destination
[root@Localhost
~]# ping -c 10 -s 1024 192.168.5.15 ----ping 5.15 IP and send 1024 packages
& c for count (stop after 10 line)
PING 192.168.5.15 (192.168.5.15) 1024(1052) bytes of
data.
1032 bytes from 192.168.5.15: icmp_seq=1 ttl=64
time=0.602 ms
1032 bytes from 192.168.5.15: icmp_seq=2 ttl=64
time=0.220 ms
1032 bytes from 192.168.5.15: icmp_seq=3 ttl=64
time=0.232 ms
1032 bytes from 192.168.5.15: icmp_seq=4 ttl=64
time=0.269 ms
1032 bytes from 192.168.5.15: icmp_seq=5 ttl=64
time=0.206 ms
1032 bytes from 192.168.5.15: icmp_seq=6 ttl=64
time=0.196 ms
1032 bytes from 192.168.5.15: icmp_seq=7 ttl=64
time=0.230 ms
1032 bytes from 192.168.5.15: icmp_seq=8 ttl=64
time=0.211 ms
1032 bytes from 192.168.5.15: icmp_seq=9 ttl=64
time=0.224 ms
1032 bytes from 192.168.5.15: icmp_seq=10 ttl=64
time=0.187 ms
---------------------------------------------------------------------------------------------------------------------
Icmp
----internet control messaging protocols
( for testing the reachability )
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# traceroute google.com
traceroute to google.com (216.58.220.14), 30 hops
max, 60 byte packets
1 122.15.105.49 (122.15.105.49) 19.963 ms
19.593 ms 19.489 ms
2 182.19.106.198 (182.19.106.198) 19.334 ms
19.258 ms 19.410 ms
3 103.29.44.7 (103.29.44.7) 19.799 ms
19.232 ms 19.126 ms
4 103.29.44.4 (103.29.44.4) 19.519 ms
19.399 ms 19.313 ms
5 72.14.211.218 (72.14.211.218) 19.278 ms
19.112 ms 19.192 ms
6 72.14.236.136 (72.14.236.136) 20.785 ms
8.664 ms 8.478 ms
7 74.125.37.235 (74.125.37.235) 10.619 ms
9.758 ms 10.416 ms
8 bom05s05-in-f14.1e100.net
(216.58.220.14) 13.045 ms 12.795 ms
12.768 ms
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# mtr google.com
My traceroute [v0.75]
Localhost.localdomain (0.0.0.0)
Fri Jan 22 03:27:05 2016
Resolver: Received error response 2. (server
failure)er of fields quit
Packets Pings
Host
Loss% Snt Last
Avg Best Wrst StDev
1.
122.15.105.49
14.0% 93 8.7 17.4
4.1 58.9
14.3
2.
182.19.106.198 8.6% 93 17.7 18.2 4.3 73.8
15.0
3. 103.29.44.7 98.9% 93
4.8 4.8 4.8 4.8
0.0
4.
103.29.44.4
8.6% 93 11.5 20.0
4.3 90.4
19.6
5.
72.14.211.218 15.1% 93
9.5 24.9
5.0 83.3
20.9
6.
72.14.236.136
14.0% 93 11.8 19.8
5.3 77.0
18.1
7.
74.125.37.235 3.2% 93 19.9 21.5
5.4 92.9
19.9
8.
bom05s05-in-f14.1e100.net
7.5% 93 8.3 18.7 5.1 94.1
16.8
---------------------------------------------------------------------------------------------------------------------
PACKET
SNIFFER TOOLS |||||| PACKET CAPTURE TOOLS
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# ethtool eth0
-----------Deprecate (OLDER)
[root@Localhost ~]# tcpdump ------------| To
check broadcast
[root@Localhost ~]# tcpdump –vvv ------| To
check broadcast
[root@Localhost ~]# tcpdump -vvv >/opt/tcpfile
-----Packets copy to tcpfiles to /opt/ folder
(sniffer | capture tools)
tcpdump: listening on eth0, link-type EN10MB
(Ethernet), capture size 65535 bytes
[root@Localhost opt]# less tcpfile -----check dump
file
[root@Localhost opt]# cat tcpfile -----check dump
file
iptraf
wireshark
---------rpm
---------------------------------------------------------------------------------------------------------------------
PORT --Protocols -----Set of rules
HTTP
–Web |
FTP – Data Transfer | SSH -
Remote |
SMTP – Mail | DHCP –Assign IP
Port
help to connect application & Protocols.
Port
on associated with protocols.
[root@Localhost ~]# less /etc/services -----to get
the all port details
tcpmux
1/tcp # TCP port service
multiplexer
echo
7/udp
ftp-data
20/tcp
ftp 21/udp fsp fspd # 21 is registered to ftp,
but also used by fsp
ssh 22/tcp # The Secure Shell
(SSH) Protocol
telnet
23/udp
lmtp
24/tcp #
LMTP Mail Delivery # 24 - private mail system
smtp 25/tcp mail
tacacs
49/tcp #
Login Host Protocol (TACACS)
re-mail-ck
50/tcp #
Remote Mail Checking Protocol
domain 53/tcp DNS # name-domain server
bootps 67/tcp DHCP # BOOTP server
bootpc 68/tcp DHCP # BOOTP client
tftp 69/udp DHCP
http 80/tcp www www-http # WorldWideWeb HTTP
rtelnet
107/tcp #
Remote Telnet
pop3
110/tcp pop-3 # POP version 3
sunrpc
111/tcp portmapper
rpcbind # RPC 4.0 portmapper TCP
auth
113/tcp authentication tap
ident
rdesktop
3389
ntp
123/udp #
Network Time Protocol
samba
137/139/445 # NETBIOS Datagram Service
imap 143/tcp imap2 # Interim Mail Access Proto v2
https
443/tcp #
http protocol over TLS/SSL
rsync
873/tcp #
rsync
rquotad
875/tcp #
rquota daemon
telnets
992/tcp
imaps 993/tcp # IMAP over SSL
pop3s 995/udp # POP-3 over SSL
MYSQL 3306
Idap
389
Nfs
2049
---------------------------------------------------------------------------------------------------------------------
How
to check port status on own system (Local Machin)
[root@Localhost ~]# nmap 127.0.0.1 -----local
system to test port
Starting Nmap 5.51 ( http://nmap.org ) at 2016-01-22
04:10 PST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000010s latency).
Not shown: 998 closed ports
PORT STATE
SERVICE
22/tcp open
ssh
25/tcp open
smtp
Nmap done: 1 IP address (1 host up) scanned in 0.13
seconds
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# nmap localhost -----local system to test port
Starting Nmap 5.51 ( http://nmap.org ) at 2016-01-22
04:10 PST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.0000070s latency).
Other addresses for localhost (not scanned):
127.0.0.1
Not shown: 998 closed ports
PORT STATE
SERVICE
22/tcp open
ssh
25/tcp open
smtp
Nmap done: 1 IP address (1 host up) scanned in 0.07
seconds
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# ip r l -----check IP , GW,
Subnet details
192.168.7.0/24 via 192.168.5.1 dev eth0 ----------------------------------------------
--GW -NW
192.168.5.0/24 dev eth0 proto kernel
scope link src 192.168.5.159 metric 1
------NW - IP
default via 192.168.5.1 dev eth0 proto static
----------------------------------------------GW
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# nmap -v -sn 192.168.4.0/24
----check all network ips details
[root@Localhost ~]# nmap 192.168.5.0/24
[root@Localhost ~]# nmap 192.168.5.0/255.255.255.0
---------------------------------------------------------------------------------------------------------------------
HOW
TO OPEN PORT IN LOCAL MACHIN (SERVER SYSTEM)
[root@Localhost ~]# namap localhost
[root@Localhost ~]# service httpd start --------open
80 port
[root@Localhost ~]# service vsftp start --------open
21/20 port
HOW
TO CHECK PORT STATUS
[root@Localhost ~]# telnet 127.0.0.1 22 -----check
22 port
[root@Localhost ~]# nc 127.0.0.1 22 – net cat -------carser is blick means port open
[root@Localhost ~]# nc 127.0.0.1 80 ----------check
80 port status on local system
[root@Localhost ~]# nc 127.0.0.1 net cat
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]#
nc …..chatting…..----remote display
[root@Localhost ~]# netstat ----------Listen |
Established
[root@Localhost ~]# netstat –an
[root@Localhost ~]# netstat –tulnp
[root@Localhost ~]# netstat –vatnp
[root@Localhost ~]# netshat –tulnp | grep –I ssh
---------------------------------------------------------------------------------------------------------------------
HOW TO SET | CHANGE HOSTNAME
[root@Localhost ~]# hostname
Localhost.locathost -----------------------------------host name
[root@Localhost ~]# hostname champu.example.com ----this command for temparory.
[root@Localhost ~]# cat /proc/sys/kernel/hostname ------temp
[root@Localhost ~]# vi /etc/sysconfig/network -------add host name in this file
Hostname=champu.example.com
[root@Localhost ~]#vi /etc/hosts -----flat DNS example
192.168.1.X champu.example.com champu ---for resolved ip to name and name to ip
1 2 3
---------------------------------------------------------------------------------------------------------------------
( DNS ----called ---Bind )
---------------------------------------------------------------------------------------------------------------------
PING
CHECK
1) /etc/hosts
2) /etc/resolv.conf
---------------------------------------------------------------------------------------------------------------------
HTTP://
FTP://
---------------------------------------------------------------------------------------------------------------------
[root@Localhost ~]# ls /etc/resolv.conf
------File contain DNS Server Informations
[root@Localhost ~]# vi /etc/resolv.conf -------add dns name
nameserver
203.12.10.201 ]
nameserver
203.12.10.202 ] ISP IP
nameserver
8.8.8.8 ]
nameserver
4.2.2.2 ] Global DNS
---------------------------------------------------------------------------------------------------------------------
No comments:
Post a Comment