Iptables blocking apt-get

[badgerbox76]

How can I fix this? My iptables polices is blocking apt-get.

apt-get install chkrootkit
Reading package lists... Done
Building dependency tree... Done
The following NEW packages will be installed:
  chkrootkit
0 upgraded, 1 newly installed, 0 to remove and 50 not upgraded.
Need to get 247kB of archives.
After unpacking 705kB of additional disk space will be used.
Err http://us.archive.ubuntu.com dapper/main chkrootkit 0.46a-2
  Temporary failure resolving 'us.archive.ubuntu.com'
Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/c/chkrootkit/chkrootkit_0.46a-2_i386.deb  Temporary failure resolving 'us.archive.ubuntu.com'
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ssh
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:www
RETURN     tcp  --  anywhere             anywhere            tcp flags:FIN,SYN,RST,ACK/SYN limit: avg 1/sec burst 3
syn_flood  tcp  --  anywhere             anywhere            tcp flags:FIN,SYN,RST,ACK/SYN
ACCEPT     icmp --  anywhere             anywhere            limit: avg 1/sec burst 1
LOG        icmp --  anywhere             anywhere            limit: avg 1/sec burst 1 LOG level warning prefix `PING-DROP:'
DROP       icmp --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:www
DROP       all  --  anywhere             anywhere

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     icmp --  anywhere             anywhere

Chain syn_flood (1 references)
target     prot opt source               destination
RETURN     all  --  anywhere             anywhere            limit: avg 1/sec burst 3
DROP       all  --  anywhere             anywhere

[chipsafts]

Don't see why you think it is an IPTables problem. Seems to me to either be a problem at the other end or a DNS problem.

[martinfst]

Try to ping the servers:

ping us.archive.ubuntu.com

If you get a response, it's not iptables related. The error seem to indicate a DNS kind of error.