On Feb 20, 2013, at 10:45 AM, Anton Shterenlikht <[email protected]> wrote:
> From: Fleuriot Damien <[email protected]> > To: [email protected] > Subject: Re: cannot ssh into a box with DHCP assigned IP address > Date: Wed, 20 Feb 2013 10:31:22 +0100 > Cc: [email protected] > > On Feb 20, 2013, at 10:28 AM, Anton Shterenlikht <[email protected]> > wrote: > > > I have a laptop with FreeBSD -current, > > with ip address assigned via DHCP. > > The laptop has neither a static ip address, > > nor a domain. > > > > I can ping the laptop fine, but cannot > > ssh into it. The sshd is running, /etc/ssh/ssd_config > > seems fine, /etc/hosts.allow is fine. > > However, /etc/hosts is just the default: > > > > # > > ::1 localhost localhost.my.domain > > 127.0.0.1 localhost localhost.my.domain > > # > > > > Is it the lack of a domain that prevents > > me from getting ssh access? > > I try to ssh with just a dynamic ip address, > > for which ping seems to work fine. > > Or is the problem somewhere else? > > > > I'm not even sure I'm asking the right > > questions. > > > > Thanks > > > > Anton > > > First, check what ports SSH listens on: > sockstat | grep ssh > > root@zzz:~ # sockstat | grep ssh > mexas ssh 16193 3 tcp4 172.21.220.12:20541 137.222.187.241:22 > root sshd 1091 3 tcp6 *:22 *:* > root sshd 1091 4 tcp4 *:22 *:* > root@zzz:~ # > > I also see: > > /var/log/auth.log:Feb 18 11:54:25 zzz sshd[1091]: Server listening on :: port > 22 > . > /var/log/auth.log:Feb 18 11:54:25 zzz sshd[1091]: Server listening on 0.0.0.0 > po > rt 22. > > Is 0.0.0.0 expected? > 0.0.0.0 = * = all IPs / interfaces > Anything else I should check in the logs? > Not that I'm aware of > > Then, assuming SSH indeed listens on *:22 , > check if you have a firewall running that > could be preventing packets from reaching your box. > > I don't think so. > There's nothing in the kernel config > > By the way, do you get a login prompt at all, > over SSH, or just a plain timeout or connection reset ? > > Just a timeout: > > root@zzz:~ # ifconfig wlan0 > wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > ether 00:21:5c:50:68:c3 > inet 172.21.220.12 netmask 0xfffffc00 broadcast 255.255.255.255 > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > media: IEEE 802.11 Wireless Ethernet OFDM/54Mbps mode 11g > status: associated > ssid eduroam channel 1 (2412 MHz 11g) bssid 00:3a:98:62:cd:a0 > country US authmode WPA2/802.11i privacy ON deftxkey UNDEF > AES-CCM 2:128-bit AES-CCM 3:128-bit txpower 14 bmiss 10 scanvalid 450 > bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5 > protmode CTS wme roaming MANUAL > root@zzz:~ # > > TZAV> ping 172.21.220.12 > PING 172.21.220.12 (172.21.220.12): 56 data bytes > 64 bytes from 172.21.220.12: icmp_seq=0 ttl=60 time=2.056 ms > 64 bytes from 172.21.220.12: icmp_seq=1 ttl=60 time=1.766 ms > ^C > > TZAV> ssh 172.21.220.12 > ssh: connect to host 172.21.220.12 port 22: Operation timed out > TZAV> > > Thanks > > Anton > Run this on your server: tcpdump -ni wlan0 ip and port 22 Then try to ssh to the box, see if SYN packets arrive, see if your box sends SYN/ACK back. _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[email protected]"
