Ljubomir Ljubojevic wrote: > Hi. > > For a long time I am puzzled why, when internet connection is gone > (beyond first router, outside of subnet) SSH (and telnet?) connection is > drastically slowed. > > Same behavior, but less impacted is observed when system boots without > working internet connection, and I am not sure, but I think even access > to SAMBA fileshares can be/is affected. Affected systems are mostly > production servers, and too spaced apart in time to be able to point a > finger in something I am doing wrong. > > I have not had time to gather more facts, I always forget/don;t have > time, so I will only focus on definite SSH issue on CentOS 6.3, although > I have seen same with 5.x. > > 1 server in question is set in following maner: > [root at chiron ~]# cat /etc/networks > default 0.0.0.0 > loopback 127.0.0.0 > link-local 169.254.0.0 > > [root at chiron ~]# cat /etc/sysconfig/network > NETWORKING=yes > NTPSERVERARGS=iburst > HOSTNAME=chiron.example.com > > [root at chiron ~]# cat /etc/hosts > 127.0.0.1 localhost localhost.localdomain localhost4 > localhost4.localdomain4 chiron.example.com chiron > ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 > chiron.example.com chiron > > Does it have anything to do with /etc/hosts file not having row with > used IP address, or is problem somewhere else? > > Searching the net gives too much irrelevant links, and all I need it to > be pointed in the right direction. perhaps due to DNS being down? try starting sshd in debug mode (-d up to -ddd) on the server and connecting while the internet connection is down and see what is being logged.