Thursday, October 16, 2014

Domain: doleta.gov

Domain: doleta.gov

If you are seeing queries for this domain, than you are likely participating in DNS Amplification attacks and your DNS server is probably reachable from the internet and has recursion enabled.

If you are seeing responses for this domain.. unlucky. You are currently beeing DDOS-ed! Good luck.


IPtables:


There are two iptable rules available. If your distribution supports Iptables 'u32' module pick this one, otherwise use the 'string' rule.

U32:
iptables --insert INPUT -p udp --dport 53 -m u32 --u32 "0x28&0xFFDFDFDF=0x06444f4c && 0x2c&0xDFDFDFFF=0x45544103 && 0x30&0xDFDFDFFF=0x474f5600 && 0x34&0xFFFF0000=0x00FF0000" -j DROP -m comment --comment "DROP DNS Q doleta.gov"

More U32 rules can be found here:

https://github.com/smurfmonitor/dns-iptables-rules/blob/master/domain-blacklist.txt

String:
iptables --insert INPUT -p udp --dport 53 -m string --from 40 --to 54 --algo bm --hex-string '|06646f6c65746103676f760000ff|' -j DROP -m comment --comment "DROP DNS Q doleta.gov"
More Iptables rules for the STRING module can be found here:


https://github.com/smurfmonitor/dns-iptables-rules/blob/master/domain-blacklist-string.txt

Source:


No IP source for this domain

Name server:


;; ANSWER SECTION:
doleta.gov. 899 IN NS ns06.dol.gov.
doleta.gov. 899 IN NS ns4.dol.gov.
doleta.gov. 899 IN NS ns2.dol.gov.
doleta.gov. 899 IN NS ns1.dol.gov.
doleta.gov. 899 IN NS ns05.dol.gov.
doleta.gov. 899 IN NS dino.doleta.gov.


Response:


A 15
AAAA 2
DNSKEY 4
MX 7
NS 14
NSEC3PARAM 2
RRSIG 9
SOA 2
TXT 2
Rsize 3691






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