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Old 09-30-2013, 04:13 PM
bds bds is offline
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Default 9.2 Networking Oddities
Hi all,
I'm experiencing some networking strangeness on 9.2.
Code:
> uname -a
FreeBSD rook 9.2-RELEASE-p7 FreeBSD 9.2-RELEASE-p7 #0: Wed Sep 11 15:02:50 UTC 2013     root@amd64-builder.pcbsd.org:/usr/obj/usr/src/sys/GENERIC  amd64
I cannot connect to my workstation in the office from my laptop (above) via ssh on em0. I get the following error message:

Code:
> ssh workstation.at.the.office
ssh_exchange_identification: Connection closed by remote host
I'm able to ssh into other machines on our network - so far the only one I can't get into is mine. :/

If I switch to my wireless connection (iwn0 - wlan0), I can ssh to my workstation without a problem. I prefer not to do this, though - the wireless network in our office is atrocious.

I've checked /etc/hosts.allow and /etc/hosts.deniedssh, but everything looks normal in /etc/hosts.allow:
Code:
sshd : /etc/hosts.deniedssh : deny 
sshd : ALL : allow
and /etc/hosts.deniedssh is empty.

Any suggestions for things to check next? Thanks, in advance, for your time & trouble.


Code:
> ifconfig
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
	ether 00:1d:72:98:56:41
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect (100baseTX <full-duplex>)
	status: active
iwn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
	ether 00:1d:72:98:56:41
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng
	status: associated
ipfw0: flags=8801<UP,SIMPLEX,MULTICAST> metric 0 mtu 65536
	nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0xa 
	inet 127.0.0.1 netmask 0xff000000 
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether 00:1d:72:98:56:41
	inet6 fe80::21d:72ff:fe98:5641%lagg0 prefixlen 64 scopeid 0xb 
	inet 160.36.193.175 netmask 0xfffffc00 broadcast 160.36.195.255
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect
	status: active
	laggproto failover lagghash l2,l3,l4
	laggport: wlan0 flags=0<>
	laggport: em0 flags=5<MASTER,ACTIVE>
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	ether 00:1d:72:98:56:41
	inet6 fe80::21d:72ff:fe98:5641%wlan0 prefixlen 64 scopeid 0xc 
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: IEEE 802.11 Wireless Ethernet OFDM/36Mbps mode 11ng
	status: associated
	ssid office-open channel 11 (2462 MHz 11g ht/20) bssid 6c:f3:7f:ad:ea:61
	country US authmode OPEN privacy OFF txpower 14 bmiss 10
	scanvalid 450 bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7
	roam:rate 64 protmode CTS ampdulimit 64k ampdudensity 8
	-amsdutx amsdurx shortgi wme roaming MANUAL
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