# Gateway router is assigning IP to CB client [.213] [CentOS], but LAN [and Gateway Router] sees CB router [.2] and its client [.213] [CentOS] as same MAC, # so can't make static @ Gateway router. ... arp -a [@ XPC] Interface: 192.168.1.101 --- 0xb Internet Address Physical Address Type 192.168.1.1 e0-3f-49-9a-8b-b8 dynamic 192.168.1.2 00-21-29-ae-77-b8 dynamic 192.168.1.213 00-21-29-ae-77-b8 dynamic 192.168.1.255 ff-ff-ff-ff-ff-ff static SSH @ Cygwin ... ssh -l Br1 192.168.1.2 Unable to negotiate with 192.168.1.2 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1 # Legacy/Solution @ https://www.openssh.com/legacy.html ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 Br1@192.168.1.2 ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 Br1@CB.LANDOMAIN # ... same results for either ... The authenticity of host 'cb.LANDOMAIN (192.168.1.2)' can't be established. RSA key fingerprint is SHA256:9nBTc20uoo4FpEzA88pATY2kNryMmlrVId5AgRQnWDY. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'cb.LANDOMAIN' (RSA) to the list of known hosts. DD-WRT v24 mini (c) 2008 NewMedia-NET GmbH Release: 07/27/08 (SVN revision: 10011) Load key "/home/USERNAME/.ssh/id_rsa": Is a directory Br1@cb.LANDOMAIN's password: Permission denied, please try again. Br1@cb.LANDOMAIN's password: # also try ... ssh -oHostKeyAlgorithms=+ssh-dss user@legacyhost Depending on the server configuration, it's possible for other connection parameters to fail to negotiate. You might find the Ciphers and/or MACs configuration options useful for enabling these. It's also possible to query which algorithms ssh supports: ssh -Q cipher # List supported ciphers ssh -Q mac # List supported MACs ssh -Q key # List supported public key types ssh -Q kex # List supported key exchange algorithms Finally, it's also possible to query the configuration that ssh is actually using when attempting to connect to a specific host, by using the -G option: ssh -G user@somehost.example.com SpeedTest 2017-01-03 12 Mbps Down / 5.8 Mbps Up WRT54GL in Client-Bridge Mode Mixed [11.b/g] 12 Mbps Down / 5.8 Mbps Up G-Only [11.g] 12 Mbps Down / 5.8 Mbps Up WiFi Bridge Mode ---------------- Router used as wireless bridge to the Gateway router's LAN; physically extends LAN to another area, wirelessly. Most effective for wired clients at [remote] bridge, else the double-WiFi-hop to base-station halves the effective speed. https://en.wikipedia.org/wiki/Bridging_(networking) dd-wrt Wiki :: Client Bridge http://www.dd-wrt.com/wiki/index.php/Client_Bridged @ Primary/Gateway router ... - Get WiFi info of Gateway [main] Router - SSID - Security info - mode (WEP/WPA2/WPA2-PSK) - key - Operating frequency info (2.4 and 5 GHz) @ Client Bridge [CB] router ... Primary and CB routers must be on same subnet if Primary router IP is ... 192.168.A.X then CB router needs IP of 192.168.A.Z So, each set @ router [self] Gateway @ 192.168.1.1 Client-Bridge @ 192.168.1.2 [OUTSIDE Gateway's DHCP-served range] - ADVANCED > Advanced Setup > Wireless Settings - Enable Bridge Mode - Get IP Address Dynamically - Get DNS Server Address Dynamically - Select same security mode as at Gateway Router ... note here the 'Dynamically' refers to hosts/clients of this client-bridge router. - Set Wireless Security to 'WPA2 Personal' - Set same wireless info/settings used by the Gateway [main] router. Gateway [Asus RT-AC66U] SMB 191.168.1.1 [SMB.LANDOMAIN] [router.asus.com] See [user.pass.key] Client-Bridge [WRT54GL-dd-wrt] CB 192.168.1.2 [CB.LANDOMAIN] See [user.pass.key] Router Name CB Router Model Linksys WRT54GL v1.1 Firmware Version DD-WRT v24-sp1 (07/27/08) mini - build 10011 LAN MAC Address 00:21:29:AE:77:B7 Wireless 2.4GHz SSID 7LOL Security WPA2-Personal AES See [user.pass.key] Wireless Status [2.4GHz] MAC Address 00:21:29:AE:77:B8 Radio Radio is On Mode Client Bridge Network Mixed SSID 7LOL Channel 6 TX Power 70 mW Rate 24 Mbps Encryption - Interface wl0 Enabled, WPA2 Personal PPTP Status Disconnected Advanced Routing Operating Mode: 'Router' DD-WRT Firmware: Current: v24-sp1 (07/27/08) mini - build 10011 Same (?) as ... v24 SP1 [Stable] Build 10020 dd-wrt.v24_mini_ge dd-wrt Wiki :: Linksys WRT54GL http://www.dd-wrt.com/wiki/index.php/Linksys_WRT54GL ftp://ftp.dd-wrt.com/stable/dd-wrt.v24%20SP1/Consumer/Linksys/WRT54GL_1.1/ dd-wrt.v24_micro_generic.bin [2008] ftp://ftp.dd-wrt.com/others/eko/V24_TNG/svn12548/ dd-wrt.v24-12548_NEWD_mini.bin [2009] dd-wrt default ... user: root p/w: admin # router IP :: see 'default' ... ip route [Uzer@localhost ~]$ ip route 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.183 metric 1 default via 192.168.1.1 dev eth0 proto static ifconfig # release/renew ip ... sudo dhclient -v -r eth0 sudo dhclient -v eth0