Lectures notes for 2010 - KTH
Lectures notes for 2010 - KTH Lectures notes for 2010 - KTH
Storing other attributes - TXT records The general syntax is: TXT “=” Examples: host.widgets.com IN TXT “printer=lpr5” sam.widgets.com IN TXT “favorite drink=orange juice” For more information see: RFC 1464: Using the Domain Name System To Store Arbitrary String Attributes Maguire Storing other attributes - TXT records 4: 58 of 74 maguire@kth.se 2010.03.21 Internetworking/Internetteknik
Configuring DNS • Configuring the BIND resolver • /etc/resolv.config • Configuring the BIND nameserver (named) • /etc/named.boot or /etc/named.config • Configuring the nameserver database files (zone files) • named.hosts the zone file that maps hostnames to IP addresses • named.rev the zone file that maps IP addresses to hostnames Maguire Configuring DNS 4: 59 of 74 maguire@kth.se 2010.03.21 Internetworking/Internetteknik
- Page 239 and 240: UDP Checksum and Pseudo-Header •
- Page 241 and 242: Port numbers in three groups Range
- Page 243 and 244: Fragmentation Required If datagram
- Page 245 and 246: • on a BSDI system: • each of t
- Page 247 and 248: With an even larger UDP packet I re
- Page 249 and 250: Datagram truncation What if the app
- Page 251 and 252: Learning about Socket programming F
- Page 253 and 254: UDP server design Stevens, Vol, 1,
- Page 255 and 256: Changed the client Changing the fol
- Page 257 and 258: if (!(proto = getprotobyname("raw")
- Page 259 and 260: ICMP Source Quench Error Since UDP
- Page 261 and 262: No error control Since UDP has no e
- Page 263 and 264: BOOTP continued When a request is s
- Page 265 and 266: DHCP: Dynamic Host Configuration Pr
- Page 267 and 268: • Message - used by a server to p
- Page 269 and 270: DHCP’s importance • allows reus
- Page 271 and 272: Example of dhcpd.conf ### Managed b
- Page 273 and 274: Trivial File Transfer Procotol (TFT
- Page 275 and 276: Mapping names to IP addresses Host
- Page 277 and 278: Zones A zone is a subtree of the DN
- Page 279 and 280: (see Stevens, Vol. 1, figure 14.2,
- Page 281 and 282: Domain registrars Internet Corporat
- Page 283 and 284: Resource Records (RR) See Stevens,
- Page 285 and 286: Network names Conventions: • it.k
- Page 287 and 288: Example: $ORIGIN it.kth.se. @ 1D IN
- Page 289: How to give your host a name? Host
- Page 293 and 294: Load leveling [1] For example, f.ro
- Page 295 and 296: Where is f.root-servers.net ? trace
- Page 297 and 298: Dynamic Domain Name System (DDNS) R
- Page 299 and 300: Attacks upon DNS • Denial of serv
- Page 301 and 302: DNS performance - top 100 From www.
- Page 303 and 304: Web performance - continued Using P
- Page 305 and 306: This lecture we have discussed: •
- Page 307 and 308: IK1550 Internetworking/Internettekn
- Page 309 and 310: Transport layer protocols • User
- Page 311 and 312: Applications which use TCP Lots of
- Page 313 and 314: TCP header continued Reliability is
- Page 315 and 316: time client SYN, seq=x SYN, seq=y,
- Page 317 and 318: client active close ACKs from clien
- Page 319 and 320: Maximum Segment Size • The Maximu
- Page 321 and 322: Window size Increasing window size
- Page 323 and 324: Silly Window Syndrome If receiver a
- Page 325 and 326: Disabling the Nagle Algorithm But s
- Page 327 and 328: Resulting bulk data flow Every segm
- Page 329 and 330: Congestion Avoidance So far we have
- Page 331 and 332: Slow start In 1989, Van Jacobson in
- Page 333 and 334: Round-Trip Time Measurement Fundame
- Page 335 and 336: Congestion Avoidance Algorithm Slow
- Page 337 and 338: Per-Route Metrics Newer TCPs keeps
- Page 339 and 340: TCP Keepalive Timer No data flows a
Configuring DNS<br />
• Configuring the BIND resolver<br />
• /etc/resolv.config<br />
• Configuring the BIND nameserver (named)<br />
• /etc/named.boot or /etc/named.config<br />
• Configuring the nameserver database files (zone files)<br />
• named.hosts the zone file that maps hostnames to IP addresses<br />
• named.rev the zone file that maps IP addresses to hostnames<br />
Maguire Configuring DNS 4: 59 of 74<br />
maguire@kth.se <strong>2010</strong>.03.21 Internetworking/Internetteknik
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