My setup at home is as follows: I have a cable modem, which is
connected to a Cisco 1605 R router, which plugs into a 3com gig
switch. Everything on my network is also plugged into the switch. One
of the computers at my house is a caching nameserver (for speedier
dns). I recently installed the Cisco router. Previously, I have used
Linksys, 3Com, and D-Link routers without any trouble whatsoever. Ever
since I started using the Cisco however, I've had trouble browsing web
sites. When I first go to a website (google.com, for example), it says
"Resolving host google.com." After a good 10 seconds, it finally moves
on to "Connecting to google.com", at which point it quickly downloads
and displays the site. Subsequent connections to the same domain name
are responsive and don't exhibit this delay (presumably because it's
using the cached dns information from my internal nameserver). At
first I assumed that something was broken with my dns setup, but when
I do an nslookup from my workstation, I get a response immediately
(even for domain names that I know are not cached by my nameserver). I
only started experiencing this problem when I started going through
the Cisco router, so that's where I assume the problem lies. Below is
most of my router config (minus passwords, etc..). I replaced my
actual "outside" address below with 1.2.3.4. My internal network
segment is 172.30.27.0/24
Router Config:
version 12.3
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
!
hostname gw1-rh
!
boot-start-marker
boot system flash flash:c1600-y-mz.123-13.bin
boot-end-marker
!
logging buffered 4096 debugging
!
clock timezone EST -5
clock summer-time EDT recurring
aaa new-model
aaa session-id common
ip subnet-zero
no ip source-route
ip name-server 172.30.27.5
ip name-server 65.254.0.2
!
interface Ethernet0
description Cablevision OptimumOnline
ip address dhcp
no ip redirects
no ip unreachables
ip nat outside
no cdp enable
!
interface Ethernet1
description LAN 172.30.27.0/24
ip address 172.30.27.1 255.255.255.0
no ip redirects
no ip unreachables
ip nat inside
!
ip nat pool xlate 1.2.3.4 1.2.3.4 netmask 255.255.240.0
ip nat inside source list 1 pool xlate overload
ip nat inside source static tcp 172.30.27.5 53 interface Ethernet0 53
ip nat inside source static udp 172.30.27.5 53 interface Ethernet0 53
ip classless
ip route 0.0.0.0 0.0.0.0 Ethernet0
ip route 172.30.30.0 255.255.255.0 172.30.1.1
no ip http server
!
access-list 1 permit 172.30.27.0 0.0.0.255
!
end |
