Arch Linux

6ng4n

Member

Registered: 2012-02-07

Posts: 84

Unanswered Name-Resolve requests on Arch Linux

Hi,

I've a Atheros AR8161 ethernet card whose driver is brand new alx on my Asus Laptop.Sometimes when using network of my university its dns resolving function randomly gets broken and I cannot resolve any names. I overcome that problem by rmmod'ing and modprobing the alx module again. This is happening rarely but when I enabled my wifi card as an access point ( by using hostapd, dhcp server and NAT over iptables) this issue starts happening very often and I can't manage the situation by rmmoding.However, it turns to the previous state by stopping all these services. So I captured a piece from my network via Wireshark. What I see is  a lot of unanswered ARP requests when issue happens. It tries resolve the name from last IP of our network. Our university gives public static IPs to students so I can't share my info for security reasons.

The strangest thing is my system works on Windows successfully, even when I shared my Internet on wlan with Windows' Internet Share & Connectify utility ( a util to create wifi APs on Windows). Our university also uses WINS but It is not relevant.

My iptables rules:

Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination         

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination         
MASQUERADE  all  --  anywhere             anywhere