Skip to content

Fix DNS Timeout messages with retry system #80

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
initstring merged 1 commit into from
Jul 12, 2025
Merged

Fix DNS Timeout messages with retry system #80

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
40 changes: 22 additions & 18 deletions enum_tools/utils.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -168,30 +168,34 @@ def dns_lookup(nameserver, name):
nameserverfile = nameserver

res = dns.resolver.Resolver()
res.timeout = 10
res.timeout = 3
if nameserverfile:
nameservers = read_nameservers(nameserverfile)
res.nameservers = nameservers
else:
res.nameservers = [nameserver]

try:
res.query(name)
# If no exception is thrown, return the valid name
return name
except dns.resolver.NXDOMAIN:
return ''
except dns.resolver.NoNameservers as exc_text:
print(" [!] Error querying nameservers! This could be a problem.")
print(" [!] If you're using a VPN, try setting --ns to your VPN's nameserver.")
print(" [!] Bailing because you need to fix this")
print(" [!] More Info:")
print(exc_text)
return '-#BREAKOUT_DNS_ERROR#-'
except dns.exception.Timeout:
print(f" [!] DNS Timeout on {name}. Investigate if there are many"
" of these.")
return ''
tries = 0

while tries < 3:
try:
res.query(name)
# If no exception is thrown, return the valid name
return name
except dns.resolver.NXDOMAIN:
return ''
except dns.resolver.NoNameservers as exc_text:
print(" [!] Error querying nameservers! This could be a problem.")
print(" [!] If you're using a VPN, try setting --ns to your VPN's nameserver.")
print(" [!] Bailing because you need to fix this")
print(" [!] More Info:")
print(exc_text)
return '-#BREAKOUT_DNS_ERROR#-'
except dns.exception.Timeout:
tries += 1

print(f" [!] DNS lookup for {name} timed out after 3 tries. Investigate if there are many of these.")
return ''


def fast_dns_lookup(names, nameserver, nameserverfile, callback='', threads=5):
Expand Down