Hálózatok konfigurálása Bevezetés (mit és hogyan állítsak, hogy elérjem az Internetet otthon)
Hálózatok konfigurálása
Bevezetés(mit és hogyan állítsak, hogy elérjem az
Internetet otthon)
OSI és az Internet
Application
Presentation
Session
Process/Application
Transport Host to Host
Network Internetwork
Data Link
Physical
Network
Access
TCP/IP protokoll architektúra
OSI Layer 4(Transport)
TCP UDP
ICMP routing SNMPOSI Layer 3(Network)
IP Filtering IP NAT IP
OSI Layer 2(Data Link)
ARP RARP PPP PPPoE LCP
802.3 802.11 ATM . . .OSI Layer 1(Physical)
10/100 Ethernet CableModem
WirelessLAN
xDSL Modem
Microsoft Network Protokoll Architektúra
NETBIOS
NetBIOS overTCP/IP
Windows Sockets
TDI (Transport Driver Inteface)
NWLink NetBEUI (NBF) TCP/IP
NDIS (Network Driver Interface Specification)
Adapter drivers
Network adapters
Dokumentáció, információ, help
• RFC
• man
• /usr/doc directory
• help
• fórumok
• google és más keresők
Hálózat konfigurálása
• Network Access: – általában automatikus
• Internetwork: – manuális– DHCP (Dynamis Host Configuration)
• Host to Host és felette:– igény szerint… most nem foglalkozunk vele
Tipikus „Network access” otthon:
• Telefon modem (PPP)
• ADSL (PPPoE)
• Cable modem
• MicroWave, Wireless
• IrDA, Bluetooth
• Ethernet (Coax, UTP)
• Egyéb más megoldások
Fontosabb hálózati parancsok
• ipconfig, ifconfig,• ping,• traceroute, tracert,• route,• nslookup, host,• arp,• NET (Windows NT, 2K, stb.)• grafikus adminisztrátori programok
(W2K) > ipconfig /all
Windows 2000 IP Configuration
Host Name . . . . . . . . . . . . : oasis1
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : inf.u-szeged.hu
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : inf.u-szeged.hu
Description . . . . . . . . . . . : SMC EZ Card 10/100 (SMC1255TX)
Physical Address. . . . . . . . . : 00-04-E2-1F-A6-EC
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 160.114.37.21
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : 160.114.37.254
DHCP Server . . . . . . . . . . . : 160.114.37.205
DNS Servers . . . . . . . . . . . : 160.114.37.205
160.114.51.3
Lease Obtained. . . . . . . . . . : Friday, March 12, 2004 1:14:45 AM
Lease Expires . . . . . . . . . . : Friday, March 12, 2004 1:24:45 AM
(Debian)> ifconfig
eth0 Link encap:Ethernet HWaddr 00:04:E2:1F:A6:1C
inet addr:160.114.37.205 Bcast:160.114.37.255 Mask:255.255.254.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:141009687 errors:2740 dropped:0 overruns:2740 frame:2740
TX packets:148590695 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1221478403 (1.1 GiB) TX bytes:2052918402 (1.9 GiB)
Interrupt:18 Base address:0xe800
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2090944 errors:0 dropped:0 overruns:0 frame:0
TX packets:2090944 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:446367543 (425.6 MiB) TX bytes:446367543 (425.6 MiB)
(W2K)> ping amadea.inf.u-szeged.hu
Pinging amadea.inf.u-szeged.hu [160.114.37.193] with 32 bytes of data:
Reply from 160.114.37.193: bytes=32 time=16ms TTL=255
Reply from 160.114.37.193: bytes=32 time<10ms TTL=255
Reply from 160.114.37.193: bytes=32 time<10ms TTL=255
Ping statistics for 160.114.37.193:
Packets: Sent = 3, Received = 3, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 16ms, Average = 5ms
(Debian) > ping amadea.inf.u-szeged.hu
PING amadea.inf.u-szeged.hu (160.114.37.193): 56 data bytes
64 bytes from 160.114.37.193: icmp_seq=0 ttl=255 time=1.1 ms
64 bytes from 160.114.37.193: icmp_seq=1 ttl=255 time=0.6 ms
64 bytes from 160.114.37.193: icmp_seq=2 ttl=255 time=0.6 ms
--- amadea.inf.u-szeged.hu ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.6/0.7/1.1 ms
(W2K) > tracert www.depo.hu
Tracing route to www.depo.hu [195.228.75.30]
over a maximum of 30 hops:
1 16 ms <10 ms 16 ms swarp0.inf.u-szeged.hu [160.114.37.254]
2 16 ms <10 ms <10 ms 160.114.120.81
3 <10 ms 16 ms <10 ms 160.114.120.61
4 <10 ms <10 ms 16 ms 195.111.97.241
5 <10 ms 32 ms <10 ms c6513-tengbeth5-1.vh.hbone.hu [195.111.97.242]
6 <10 ms 16 ms 15 ms ge2-10.osr0-vhugo.matav.net [145.236.89.193]
7 15 ms 16 ms <10 ms g4-3-0.core0-ip2.matav.net [145.236.85.13]
8 <10 ms 15 ms 16 ms vlan9.6509-1-msfc2.adatpark.hu [145.236.89.6]
9 <10 ms 16 ms <10 ms web1.hirekmedia.hu [195.228.75.30]
Trace complete.
(amadea) > traceroute www.depo.hu
traceroute to www.depo.hu (195.228.75.30), 30 hops max, 20 byte packets
1 swarp0 (160.114.37.254) 2 ms 2 ms 3 ms
2 160.114.120.81 (160.114.120.81) 7 ms 15 ms 7 ms
3 160.114.120.61 (160.114.120.61) 8 ms 7 ms 9 ms
4 195.111.97.241 (195.111.97.241) 10 ms 9 ms 16 ms
5 c6513-tengbeth5-1.vh.hbone.hu (195.111.97.242) 9 ms 8 ms 8 ms
6 ge2-10.osr0-vhugo.matav.net (145.236.89.193) 11 ms 9 ms 9 ms
7 g4-3-0.core0-ip2.matav.net (145.236.85.13) 9 ms 11 ms 9 ms
8 vlan9.6509-1-msfc2.adatpark.hu (145.236.89.6) 12 ms 11 ms 10 ms
9 web1.hirekmedia.hu (195.228.75.30) 11 ms 10 ms 10 ms
(W2K) > route print
. . .
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 160.114.37.254 160.114.37.21 1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
160.114.36.0 255.255.254.0 160.114.37.21 160.114.37.21 1
160.114.37.21 255.255.255.255 127.0.0.1 127.0.0.1 1
160.114.255.255 255.255.255.255 160.114.37.21 160.114.37.21 1
169.254.0.0 255.255.0.0 169.254.218.201 169.254.218.201 1
169.254.218.201 255.255.255.255 127.0.0.1 127.0.0.1 1
169.254.255.255 255.255.255.255 169.254.218.201 169.254.218.201 1
192.168.17.0 255.255.255.0 192.168.17.1 192.168.17.1 1
192.168.17.1 255.255.255.255 127.0.0.1 127.0.0.1 1
192.168.17.255 255.255.255.255 192.168.17.1 192.168.17.1 1
224.0.0.0 224.0.0.0 160.114.37.21 160.114.37.21 1
224.0.0.0 224.0.0.0 169.254.218.201 169.254.218.201 1
224.0.0.0 224.0.0.0 192.168.17.1 192.168.17.1 1
255.255.255.255 255.255.255.255 169.254.218.201 169.254.218.201 1
Default Gateway: 160.114.37.254
. . .
(Debian) > /sbin/route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
160.114.36.0 * 255.255.254.0 U 0 0 0 eth0
default swarp0.inf.u-sz 0.0.0.0 UG 0 0 0 eth0
(W2K) > nslookup
> set qtype=ANY
> inf.u-szeged.hu
Server: rgai.inf.u-szeged.hu
Address: 160.114.37.205
inf.u-szeged.hu MX preference = 100, mail exchanger = orion.fwall.u-szeged.hu
inf.u-szeged.hu MX preference = 200, mail exchanger = eos.fwall.u-szeged.hu
inf.u-szeged.hu MX preference = 300, mail exchanger = amadea.inf.u-szeged.hu
u-szeged.hu nameserver = dns.cc.u-szeged.hu
u-szeged.hu nameserver = ns2.sztaki.hu
u-szeged.hu nameserver = dns1.szote.u-szeged.hu
u-szeged.hu nameserver = huni6.cc.u-szeged.hu
orion.fwall.u-szeged.hu internet address = 160.114.120.249
eos.fwall.u-szeged.hu internet address = 160.114.120.248
amadea.inf.u-szeged.hu internet address = 160.114.37.193
dns.cc.u-szeged.hu internet address = 160.114.8.21
ns2.sztaki.hu internet address = 193.225.86.1
dns1.szote.u-szeged.hu internet address = 160.114.103.224
huni6.cc.u-szeged.hu internet address = 160.114.8.16
(RH) > host amadea.inf.u-szeged.hu
amadea.inf.u-szeged.hu has address 160.114.37.193
(W2K) > arp -a
Interface: 160.114.37.21 on Interface 0x1000005
Internet Address Physical Address Type
160.114.37.193 00-60-b0-59-0d-7c dynamic
160.114.37.204 00-10-dc-23-7d-38 dynamic
160.114.37.206 00-10-dc-23-7d-1f dynamic
160.114.37.254 00-01-e7-97-c9-00 dynamic
(RH) > arp –a
nokiaa.inf.u-szeged.hu (160.114.37.74) at 00:40:07:02:01:A3 [ether] on eth1
oasis1.inf.u-szeged.hu (160.114.37.21) at 00:04:E2:1F:A6:EC [ether] on eth1
Fontosabb hálózati file-ok
• hosts,
• services,
• protocols,
• dhcpd.conf
• samba/smb.conf
(W2K) > Dir C:\WINNT\system32\drivers\etc
Volume in drive C has no label.
Volume Serial Number is 3031-B4D4
Directory of c:\WINNT\system32\drivers\etc
05/13/2002 05:58p <DIR> .
05/13/2002 05:58p <DIR> ..
10/17/2003 09:33p 2,410 hosts
07/26/2000 01:00p 3,683 lmhosts.sam
07/26/2000 01:00p 407 networks
07/26/2000 01:00p 799 protocol
07/26/2000 01:00p 7,116 services
5 File(s) 14,415 bytes
2 Dir(s) 1,025,839,104 bytes free
(RH) > ls \etc
. . .
(amadea) > cat hosts
. . .
127.0.0.1 localhost loopback
160.114.37.113 ihp01.inf.u-szeged.hu ihp01
160.114.37.114 ihp02.inf.u-szeged.hu ihp02
160.114.37.115 ihp03.inf.u-szeged.hu ihp03
160.114.37.116 ihp04.inf.u-szeged.hu ihp04
160.114.37.117 ihp05.inf.u-szeged.hu ihp05
160.114.37.118 ihp06.inf.u-szeged.hu ihp06
. . .
(amadea) > cat services
. . .
daytime 13/udp #
qotd 17/tcp quote # Quote of the Day
chargen 19/tcp ttytst source # Character Generator
chargen 19/udp ttytst source #
ftp-data 20/tcp # File Transfer Protocol (Data)
ftp 21/tcp # File Transfer Protocol (Control)
ssh 22/tcp # Secure Shell Protocol (telnet)
ssh 22/udp # Secure Shell Protocol (telnet)
telnet 23/tcp # Virtual Terminal Protocol
smtp 25/tcp # Simple Mail Transfer Protocol
time 37/tcp timeserver # Time
time 37/udp timeserver #
rlp 39/udp resource # Resource Location Protocol
whois 43/tcp nicname # Who Is
domain 53/tcp nameserver # Domain Name Service
domain 53/udp nameserver #
bootps 67/udp # Bootstrap Protocol Server
. . .
(amadea) > cat protocols
. . .
ip 0 IP # internet protocol, pseudo protocol number
icmp 1 ICMP # internet control message protocol
igmp 2 IGMP # internet group management protocol
ggp 3 GGP # gateway-gateway protocol
tcp 6 TCP # transmission control protocol
egp 8 EGP # exterior gateway protocol
pup 12 PUP # PARC universal packet protocol
udp 17 UDP # user datagram protocol
hmp 20 HMP # host monitoring protocol
xns-idp 22 XNS-IDP # Xerox NS IDP
rdp 27 RDP # "reliable datagram" protocol
. . .
(Debian) > cat /etc/dhcpd.conf
. . .
# rtx5 - rgai
#host rtx5 {
# hardware ethernet 00:00:A7:12:76:71;
# fixed-address 160.114.37.20;
#}
# Felfoldi Laszlo (15) - rgai
host oasis1 {
hardware ethernet 00:04:E2:1F:A6:EC;
fixed-address 160.114.37.21;
}
# Toth Laszlo (20) - rgai
host oasis2 {
hardware ethernet 00:0C:6E:A4:FC:73;
fixed-address 160.114.37.22;
}
. . .